Class / Patent application number | Description | Number of patent applications / Date published |
210696000 | Preventing, decreasing, or delaying precipitation, coagulation or flocculation | 89 |
20090026144 | METHOD AND DEVICE FOR PREVENTING CORROSION IN HOT WATER SYSTEMS - Disclosed is a method of controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed one or more active chemical species into the hot water system. | 01-29-2009 |
20090065439 | METHOD AND DEVICE FOR PREVENTING CORROSION IN HOT WATER SYSTEMS UNDERGOING INTERMITTENT OPERATIONS - Disclosed is a method of controlling a real-time oxidation-reduction potential in a hot water system undergoing a wet layup sequence to inhibit corrosion in the hot water system. The method includes separating the wet layup sequence into a plurality of phases. Each phase is either short-term or long-term and a subset of the short-term phases is optionally transitional. The method further includes defining one or more zones in the hot water system. At least one of the defined zones is selected for each phase and one or more of the selected zones include at least one ORP probe operable to measure the real-time ORP and communicate with a controller. The ORP probe(s) either intermittently or continuously measure the real-time ORP at operating temperature and pressure at one or more of the selected zones in one or more of the phases and transmit the measured real-time ORP to the controller. The real-time ORP is assessed to determine whether it conforms to an ORP setting for that phase. The invention further includes a multi-component control device for a hot water system undergoing a wet layup sequence. | 03-12-2009 |
20090065440 | METHOD AND DEVICE FOR CLEANUP AND DEPOSIT REMOVAL FROM INTERNAL HOT WATER SYSTEM SURFACES - Disclosed is a method of inhibiting and/or removing deposits from internal surfaces in a hot water system. The method includes controlling a real-time oxidation-reduction potential in a hot water system to alter the dynamic between deposit constituents and the bulk water of the system to inhibit deposition or initiate deposit removal. The method is equally effective for a system undergoing a wet layup sequence or in an online operational system. The invention further includes a multi-component deposit inhibition and/or removal device, including a receiver, a processor, and a transmitter that work in unison to alter the system dynamics to inhibit or remove deposits. | 03-12-2009 |
20090095686 | Process And System For Treating Waste From Aluminum Production Containing PAH And Fluoride Ions By Flotation And Stabilization - A process for treating a waste material coming from aluminum production, the waste material containing contaminants polycyclic aromatic hydrocarbons (PAH) and inorganic fluoride compounds containing fluoride ions, involves flotation of a waste mixture of the waste material in the presence of a surfactant capable of producing PAH-rich micelles that are floated to produce froth containing the PAH-rich micelles; and stabilization of the waste mixture by adding a fluoride ion stabilizer to form stabilized fluoride compounds with reduced solubility in the waste mixture and in a toxicity characteristics leaching procedure test, to produce decontaminated solids containing the stabilized fluoride compounds and a leachate solution. | 04-16-2009 |
20100176060 | Method to Inhibit Scale Formation in Cooling Circuits Using Carbon Dioxide - Scaling is controlled in a cooling water system with CO2 based upon measurements of the cooling water's pH, alkalinity and Ca | 07-15-2010 |
20100288706 | METHOD FOR THE PREPARATION OF AT LEAST ONE COMPOUND FROM BLOOD, AND EXTRACTION DEVICE FOR USE IN THE EXECUTION OF SAID METHOD - Method for the preparation of at least one compound with biological properties from blood, where said method is performed in sealed tubes at a pressure below atmospheric pressure, thereby reducing or preventing the bacterial contamination of the compound through handling. The method comprises the repetition, for as many times as is required, of the following steps: connecting a second container that is vacuum-sealed to an extraction device connected in turn to a first container that contains blood separated into fractions, waiting for a period of time until the required fraction(s) is/are transferred, and removing said second container, with it thus being possible to obtain several second containers with different compounds for different medical applications including biological therapies. The steps may be performed in a closed system, without removing the caps of the containers, or alternatively the first container may be opened prior to the introduction of the extraction device. | 11-18-2010 |
20120031849 | AERATED REACTOR APPARATUS AND METHODS - A reaction tank useful for precipitating struvite from aqueous solutions such as wastewater comprises an aeration system. The aeration system includes air diffusers in the reaction tank. The air diffusers are located at a level below an outlet of the reaction tank. The airflow control mechanism comprises means for automatically controlling the flow of the stripping gas from the diffusers. The airflow control mechanism may be configured to automatically control the flow of stripping gas in response to a signal from a sensor measuring the pH of the aqueous solution the alkalinity of the aqueous solution or the concentration of dissolved carbon dioxide in the aqueous solution. | 02-09-2012 |
20120175313 | SYSTEM AND METHOD FOR ADJUSTMENT OF BLOOD SEPARATION PROCEDURE PARAMETERS - Systems and methods are provided for automatically adjusting the operational parameters of a blood separation procedure. A blood separation device has an inlet for passing fluid thereinto and an outlet for removing fluid therefrom. A pump system is provided for moving fluid into and out of the device. In use, blood is conveyed into the device, where platelets are separated from at least a portion of the blood. A controller determines the amount of platelets in the device. Based at least in part on the amount of platelets in the device, corrective action is taken to avoid platelet aggregation in the device. The corrective action may be conveying an elevated amount of anticoagulant into the blood and/or the device and may be initiated when the determined amount of platelets approaches, meets, or exceeds a threshold predicted likelihood of platelet aggregation. | 07-12-2012 |
20130026105 | METHOD TO INHIBIT SCALE FORMATION IN COOLING CIRCUITS USING CARBON DIOXIDE - Scaling is controlled in a cooling water system with CO2 based upon measurements of the cooling water's pH, alkalinity and Ca | 01-31-2013 |
20130048569 | PULSE-POWER APPARATUS AND WATER TREATMENT SYSTEM FOR INHIBITING SCALE FORMATION AND MICROORGANISM GROWTH - The present invention relates to an apparatus for inhibiting scale formation and microorganism growth within a moving water system, with the apparatus including: (i) a pulse-power assembly having a fly-back pulse generator circuit effective to produce a current pulse that when terminated yields a voltage spike and generates a plurality of frequencies of energy, where the fly-back pulse generator circuit comprises a coil as an integral portion of the fly-back pulse generator circuit; and (ii) a chamber for passing water from the moving water system therethrough, where the coil is wound around the chamber so as to transmit the plurality of frequencies of energy into the chamber in order to inhibit scale formation and microorganism growth within the moving water system. Water treatment systems and methods of using the apparatus are also provided. | 02-28-2013 |
20130062287 | APPARATUS AND METHOD FOR DE-WATERING OF SLURRIES - A system for dewatering a stream of slurry has a first and a second separator. The first separator removes objects above a first size, to produce a stream of primary treated slurry. The second separator removes objects above a second size from the primary treated stream, the second size being smaller than the first size. Optionally, a third separator removes objects above a yet smaller third size from the stream of secondary treated slurry. The first separator has a plurality of sieve mat supports alternately connected to a main support frame section and a movable support frame section so that the flexible sieve mat can be agitated by the movable support frame section, a collector being provided for collecting the primary treated slurry passing through the flexible sieve mat. In an optional step, water contained in the separated solids is removed. | 03-14-2013 |
20130082004 | WATER AREA EQUIPMENT THAT CAN INHIBIT WATER SCALE FORMATION - There is provided a water area equipment that can inhibit water scale formation and further can very easily remove formed water scale. In the water area equipment, silicic acid polymerization can be inhibited to reduce water scale formation, and, further, formed water scale can very easily be removed, for example, by lightly wiping off the water scale. The water area equipment on which water from a water supply source can be poured comprises a unit configured to add an inhibitor for silicic acid polymerization to water deposited as water residual on the surface of the water area equipment and can inhibit water scale formation and can allow formed water scale to be easily removed. A specific unit that inhibits the polymerization of silicic acid is configured to enhance the acidity of water and, for example, to adjust pH of residual water to 1.5 to 5.5. | 04-04-2013 |
20130118987 | ANTI-SCALE WATER TREATMENT SYSTEM AND METHOD - This invention relates to an anti-scale water treatment system, composition and related methods. The system suppresses hard scale formation by releasing small amounts of transforming agent into water. | 05-16-2013 |
20130233803 | METHOD AND APPARATUS FOR PRODUCING PLATELET RICH PLASMA AND/OR PLATELET CONCENTRATE - Platelet rich plasma and/or platelet concentrate is prepared by placing whole blood in a first chamber of a sterile processing disposable having two chambers. The processing disposable is subjected to a first centrifugation to separate red blood cells, and the resulting platelet rich plasma supernatant is decanted to the second chamber. The processing disposable is subjected to a second centrifugation to concentrate platelets. A volume of the platelet poor plasma supernatant in the second chamber is removed, and the platelets are re-suspended in the remaining plasma. The second chamber may contain anticoagulant to preclude aggregation of the platelets. | 09-12-2013 |
20140027384 | Apparatus and Methods for Controlled Release of Additive Compositions - Containers for controlled release of an additive composition into a liquid composition include a liquid impermeable casing having a hollow interior, at least one first opening, at least one second opening and at least one third opening, a liquid valve operable to allow a liquid composition to pass into the hollow interior across the liquid valve, an air valve operable to allow air to pass out of the hollow interior across the air valve and a membrane component secured to the casing. Methods of releasing additive compositions into liquid compositions are also provided. | 01-30-2014 |
20140076820 | SYSTEM AND METHOD FOR AERATION - An aeration device includes a foam suppression system. The aeration device raises the level of oxygen and air in a body of substantially liquid fluid, such as an aerating-oxidizing pond, lagoon, basin, or reservoir. The aeration system is buoyant and floats on top of the body of fluid. The foam suppression system includes a submersible grinder pump coupled to a sprinkler head by a fluid conduction system. The submersible grinder pump draws in a fluid from beneath a surface of a body of fluid and pumps it through the fluid conduction system and out of the sprinkler head. The sprinkler head sprays the fluid drawn from beneath the fluid surface far outward onto an area surrounding the aeration device with surface foam. The falling water or fluid sprayed from the sprinkler head quashes the surface foam. The sprinkler head is disposed in a location on the aeration device suitable to suppress the surface foam. | 03-20-2014 |
20140083949 | SCALE INHIBITION METHOD AND GEOTHERMAL POWER GENERATING DEVICE - A method for inhibiting scale including inorganic cations, and an economically operable geothermal power generating device which can inhibit deposition of scale. The geothermal power generating device includes: an inorganic cation concentration measuring device for measuring the concentration of bivalent or more inorganic cations in geothermal water collected from a production well; a flowmeter for measuring the flow rate of the geothermal water collected from the production well; a heat removal unit for lowering the temperature of the geothermal water; a thermometer for measuring the temperature of the geothermal water after removing heat; a pH measuring device for measuring the pH of the geothermal water after removing heat; a calculation processing unit for calculating the additive amount of a scale inhibitor; and a control unit for adding the scale inhibitor to the geothermal water by the amount calculated by the calculation processing unit. | 03-27-2014 |
20140197108 | METHOD OF CONTAINING A SPILL IN AN AQUEOUS ENVIRONMENT AND/OR A SPILL CONTAINMENT APPARATUS - A method of containing a spill in an aqueous environment, comprises the steps of: placing a polymeric pipe under the surface level of the aqueous environment in the vicinity of a site of potential spillage; and raising the pipe from under the surface level to a containment level; wherein the pipe forms, when raised, at least a partial boundary around the spill for containing the spill. | 07-17-2014 |
20140311988 | METHOD AND APPARATUS FOR PRODUCING PLATELET RICH PLASMA AND/OR PLATELET CONCENTRATE - Platelet rich plasma and/or platelet concentrate is prepared by placing whole blood in a first chamber of a sterile processing disposable having two chambers. The processing disposable is subjected to a first centrifugation to separate red blood cells, and the resulting platelet rich plasma supernatant is decanted to the second chamber. The processing disposable is subjected to a second centrifugation to concentrate platelets. A volume of the platelet poor plasma supernatant in the second chamber is removed, and the platelets are re-suspended in the remaining plasma. The second chamber may contain anticoagulant to preclude aggregation of the platelets. | 10-23-2014 |
20140326674 | Zero Liquid Discharge Method for High Silica Solutions - Disclosed are zero liquid discharge (ZLD) processes that utilize naturally occurring or supplemental silicate in the water supply for removing magnesium and calcium hardness from aqueous alkaline streams in the form of a silica gel, thereby allowing separation of a low hardness supernant for recycling. | 11-06-2014 |
20150027955 | UTILIZATION OF TEMPERATURE HEAT ADSORPTION SKIN TEMPERATURE AS SCALE CONTROL REAGENT DRIVER - The invention provides methods, compositions, and apparatuses for preventing the formation of scale in heap leach process solution distribution systems comprised of piping, spray nozzels, or emitter tubes. Solution distribution system components often become fouled by scale because of local hot spots more prone to form scale than other locations along the systems length. Positioning sensors that detect periods of high temperature stress and adjusting scale control reagent dosage to send the right amount to inhibit hot spot deposition allows for the control of scale without using wasteful excessive amounts of scale control reagents. This can vastly improve scale control performance under high temperature stress conditions while minimizing scale control reagent waste under less severe stress conditions to reduce the total operating cost of running heap leach mining operations which depend upon well-functioning solution distribution systems. | 01-29-2015 |
20150090665 | ACTIVATED SOLUTIONS FOR WATER TREATMENT - The present invention relates to activated solutions comprising one or more of hypochlorous acid, bicarbonate ions, and phosphate ions for use in water treatment, in particular water purification and descaling, and processes for making the same. | 04-02-2015 |
20150122739 | DEVICE AND METHOD FOR SEPARATING GRINDING OIL FROM GRINDING SLURRIES - An apparatus has a stirred tank with a stirrer movable upwards and downwards. Oil-containing grinding sludge is introduced into the stirred tank by a supply conduit. Separating agent is introduced into the stirred tank for separating the grinding oil from the grinding sludge. The sludge is discharged into a receiving tank via a discharge conduit. In the stirred tank, a movable annular plate is guided to form a seal on a stirrer guide tube and/or on the inner face of the wall of the tank. The plate has a passage for discharging the grinding oil. A discharge conduit for the de-oiled grinding sludge is at the lowest point of the tank. The stirrer achieves a homogeneous mixture of separating agent and grinding sludge, so that the grinding oil can be separated from grinding particles of the sludge. The grinding oil can then float and be removed. | 05-07-2015 |
20160075582 | PROCESS FOR WORKING UP WASTE WATER FROM NITROBENZENE PREPARATION - The present invention provides a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein | 03-17-2016 |
20160106908 | System and Method for the Re-Anticoagulation of Platelet Rich Plasma - A method for the re-anticoagulation of platelet rich plasma in a blood apheresis system includes priming the blood apheresis system with anticoagulant, such that a volume of anticoagulant is transferred to a PRP container. The method may then transfer the anticoagulant within the PRP container to a red blood cell container, and collect a volume of platelet rich plasma within the PRP container. The platelet rich plasma may be collected in a plurality of cycles. Between collection cycles, the method may transfer a portion of the volume of anticoagulant from the red blood cell container to the PRP container. | 04-21-2016 |
20160115052 | SYSTEM AND METHOD FOR THE TREATMENT OF LIQUID WASTE IN ZERO GRAVITY - A waste handling assembly includes a hose with an inlet for accepting waste. A plurality of pretreatment tablets are located within the hose and are removeably attached to the hose. | 04-28-2016 |
20160115061 | WATER TREATMENT SYSTEM, WATER TREATMENT METHOD, COOLING FACILITY AND POWER GENERATING FACILITY - A water treatment system provided with: a first scale inhibitor-supplying unit which supplies a scale inhibitor to a blowdown water, the blowdown water being water to be treated that is generated in a cooling tower and contains at least a salt and silica; a first pH-adjusting unit which adjusts the pH of the blowdown water, to which the scale inhibitor has been supplied using a pH adjusting agent; a first desalinating apparatus which is provided downstream of the first pH-adjusting unit, removes the salt in the blowdown water, and separates the water into a first reclaimed water and a first concentrated water; and a first crystallizing unit which is provided downstream of the first desalinating apparatus and has a first crystallizing tank for calcium sulfate from the first concentrated water and a first seed crystal-supplying unit for supplying calcium sulfate seed crystals of calcium sulfate to the first crystallizing tank. | 04-28-2016 |
20160137521 | METHOD AND SYSTEM FOR EXTRACTING RED-MUD LUMPS FROM SLURRY - The present invention provides a method and system for extracting a plurality of red mud lumps from a slurry. The method and system includes separating an aqueous content from the slurry by simultaneous action of one or more de-watering agents and a physical force, and extracting the plurality of red-mud lumps having a moisture content of less than 18 percent from a slurry mixture. The separating of the aqueous content from the slurry includes feeding the slurry mixture to a filtering arrangement, exerting a first physical force to the slurry mixture in the filtering arrangement; and exerting a second physical force to the slurry mixture in the filtering arrangement. The slurry mixture includes the slurry and the one or more de-watering agents in a pre-determined quantity. The filtering arrangement is utilized for the extracting of the plurality of red-mud lumps from the slurry. | 05-19-2016 |
20160138349 | TREATMENT OF HEAVY OIL CUTTINGS FOR DISPOSAL - The present disclosure is directed to stabilized drill cuttings and a process to stabilize the drill cuttings recovered from drilling a well. The cuttings are mixed with an emulsifier and waxy binding agent and then passed through a centrifuge to separate the stabilized drill cuttings from liquid. The stabilized drill cuttings can then be disposed in a suitable landfill. The stabilized cuttings may also be processed to remove oil and/or bitumen from them, prior to disposal. | 05-19-2016 |
20160151556 | System and Method for Collecting Platelets and Anticipating Plasma Return | 06-02-2016 |
20160167997 | METHOD FOR TREATING COOLING WATER SYSTEM | 06-16-2016 |
210697000 | Utilizing inorganic phosphorus agent | 8 |
20090294372 | INHIBITION OF WATER FORMED SCALE IN ACID CONDITIONS - The current invention relates to the inhibition of scale deposits in an acidic slurry or solution. The current invention uses an aqueous synthetic mixture comprising a phosphate, phosphonate, anionic polymer, or combinations thereof in the slurry and/or solution to inhibit scale during the processing of ore. The production of scale in an acidic environment is difficult because of the acidic solution neutralizing most known inhibitors. The claimed invention has a significant decrease in the scale production allowing for reduced down time of systems for de-scaling procedures. | 12-03-2009 |
20090294373 | INHIBITION OF WATER FORMED SCALE IN ACID CONDITIONS - The current invention relates to the inhibition of scale deposits in a slurry or solution under acidic conditions. The current invention uses an aqueous synthetic mixture comprising a phosphate, phosphonate, anionic polymer, or combinations thereof in the slurry and/or solution to inhibit scale deposition from acidic process streams. The control of scale under acidic conditions is difficult because the acidic environment renders most known inhibitors ineffective. The claimed invention causes a significant decrease in the scale generated allowing for reduced down time of systems for de-scaling procedures and thus increasing production. | 12-03-2009 |
20120024796 | Sustainable method and system for treating water bodies affected by bacteria and microalgae at low cost - A sustainable method and system for treating and maintaining bodies of water at low cost for low density recreational use is disclosed. A system of the invention generally includes at least one containing means, at least one coordination means, at least one chemical application means, at least one non-intrusive mobile suction means, and at least one filtration means. The coordinating means can receive information regarding water quality parameters that are controlled, and can timely activate the processes necessary to adjust the water quality parameters within their respective limits. The disclosed methods and system filter only a small fraction of the total water volume, up to 200 times less per day than the flow filtered by conventional swimming pool filtration systems. The disclosed methods and system also use less chemicals, up to 100 times less than conventional swimming pool water treatment systems. The methods and system of the present invention can be used to treat recreational water bodies affected by bacteria and microalgae and provide sustainable methods for producing water that complies with bacteriological and physicochemical requirements for recreational water, as set forth by governmental regulatory agencies such as the Environmental Protection Agency (EPA), for bathing with full body contact. | 02-02-2012 |
20130068695 | Methods and Compositions For the Prevention of Struvite Scale Formation In Wastewater Systems - A blend of micro-crystals of magnesium ammonium phosphate and other seed materials with magnesium hydroxide slurries reduces struvite scale in wastewater collection systems leading into waste-water treatment plants. These “seeds” act as attractants to phosphates and ammonia to allow the seeds to grow and remain dispersed throughout the waste water system. This greatly minimizes, or prevents struvite scale from building up in unwanted areas such as pipes, pumps, and valves that could potentially cause water flow blockage. | 03-21-2013 |
20130299432 | Sulfate Scale Control In Low PH Aqueous Systems - Scale control agents comprising organic phosphonates, either alone or in mixtures with inorganic phosphonates and also optionally polymers, such as low molecular weight polymeric dispersants. The scale control agents may be applied to inhibit scale formation or deposition in highly acidic aqueous systems by adding these agents to such systems in amounts effective to inhibit metal sulfate scale formation. | 11-14-2013 |
20140332470 | Trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method - A trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method are provided, And a preparation method thereof comprises steps of processing Michael addition reaction on trimethylolpropane triacrylate (CH | 11-13-2014 |
20140360943 | Corrosion control composition for water treatment process - The present invention relates to a water treatment composition comprising blended phosphates which exhibit a synergistic effect for corrosion and scale control and as a sequestering chemical treatment of potable water and more particularly to chemistry which lowers the phosphate concentration necessary to achieve effective corrosion prevention. The composition controls corrosion and cleans the water distribution line by removing scale, tuberculation, and biofilm. Sequestration of the heavy metals and soft metals such as iron, manganese, calcium, and magnesium provides complete solubility of the material to be removed from the metal surface. The inclusion of citric acid with the blended phosphate formula improves drinking water quality in 2 ways: 1) a reducing agent reverses the oxidation of metals which would convert metal to metal salts (copper/lead, etc.) and 2) by chelation, it encapsulates transition metal cations, especially Manganese and Iron, found while source water passes through the treatment process and the drinking water distribution piping network. | 12-11-2014 |
20160068416 | ANTISCALANT COMPOSITION AND ITS USE - The invention relates to a liquid antiscalant composition for reducing calcium oxalate scale formation. The composition comprises a polyanionic antiscalant agent having a plurality of anionic groups, which antiscalant agent is selected from the group consisting of polyphosphates, polymers comprising at least one carboxylic group and any of their mixtures. The antiscalant composition further comprises magnesium ions. The invention further relates to use of the antiscalant composition for inhibiting and/or reducing formation of calcium oxalate scale in pulp and paper industry. | 03-10-2016 |
210698000 | Utilizing organic agent | 50 |
20080264870 | Cooling water corrosion inhibition method - A method of providing corrosion inhibition to copper, nickel, aluminum, zinc, tin, lead, beryllium, carbon steel, various alloys of such metals, and galvanized coatings in evaporative cooling water applications approaching zero liquid discharge that are specifically attacked by cooling water with residuals of corrosive chemistry or ions such as ammonia/ammonium ion, chloride, high TDS, OH | 10-30-2008 |
20080264871 | Method of Treating Fumed Silica-Containing Drainage Water - In a process for treatment of powdery fumed silica, fumed silica to be discarded is collected by dispersing the fumed silica in water. Disclosed is a method for treatment of a fumed silica-containing wastewater collected in the process. The method comprises the steps of: adding an inorganic coagulant containing a metal to a fumed silica-containing wastewater in an amount of 15 to 300 mg/l. in terms of the metal, wherein the wastewater is either a wastewater containing fumed silica at a concentration of 0.05 to 3.0% by mass or a wastewater whose fumed silica content is adjusted to 0.05 to 3.0% by mass; and adding an organic polymeric coagulant to the mixture. | 10-30-2008 |
20100116750 | SILANE SUBSTITUTED POLYALKYLENE OXIDE REAGENTS AND METHODS OF USING FOR PREVENTING OR REDUCIN ALUMINOSILICATE SCALE IN INDUSTRIAL PROCESSES - Materials and methods are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″) | 05-13-2010 |
20100122956 | METHOD FOR TREATING IRON IN A SILVER RECOVERY PROCESS - A method of reducing or preventing the amount of iron sludge or precipitate that forms as a result of the recovery of silver from chemical solutions, such as a standard photographic solution. The method generally involves the introduction of a source of a conjugate organic base, such as a weak organic acid like citric acid or a salt of the conjugate organic base like a citrate salt, to the chemical fluid either before or during the silver recovery process. Preferably the source of conjugate organic base is introduced by combining it with a binder to form a time release cake or placing it in a container that has a semipermeable membrane that maintains the concentration of the conjugate organic base in the chemical fluid from about 0.2 to about 78 milimolar over a period of time. | 05-20-2010 |
20110309027 | METHOD FOR DEGRADING CHLORINATED-ORGANIC POLLUTANT - A method for degrading chlorinated-organic pollutant comprises the steps of providing a chlorinated-organic pollutant contaminated medium having at least one chlorinated-organic pollutant of high concentration; adding a biodegradable surfactant into the chlorinated-organic pollutant contaminated medium to enable the chlorinated-organic pollutant of high concentration to reduce surface tension and increase solubility, and makes the chlorinated-organic pollutant of high concentration dissolve in water easily; adding a persulfate (S | 12-22-2011 |
20120318745 | METHOD FOR INHIBITING FLOCCULATION IN WASTEWATER TREATMENT - Methods for inhibiting, preventing, and disrupting flocculations in wastewater treatment streams. | 12-20-2012 |
20130015139 | Composition and System for Treating Paint Spray Booth Water - Disclosed are combinations of one or more cationic starch(es) and aluminum salts to produce a composition for detackifying paint at lower doses than those required using conventional treatments while providing improved handling and a more “green” environmental profile. The compositions may be utilized in methods of detackifying and dispersing solvent borne paints and/or coagulating/flocculating and dispersing waterborne paints during the treatment of paint spray booth water. | 01-17-2013 |
20130037491 | POLYMER MIXTURES AS DEPOSIT INHIBITORS IN WATER-BEARING SYSTEMS - A polymer mixture in solid or aqueous form includes a content of from 5 to 95% by weight of a first polymer and a content of from 5 to 95% by weight of a second polymer. The first polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 20 000 g/mol. The second polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 50 000 g/mol. The polymer mixture can inhibit precipitation and sedimentation of calcium salts and magnesium salts in water-bearing systems. | 02-14-2013 |
20130146545 | USE OF ECO-FRIENDLY MICROEMULSIONS IN OIL CLEANING APPLICATIONS - An environmentally-friendly cleaning composition for oil cleaning comprising (a) a blend of dibasic esters, (b) one or more surfactants (c) and, optionally, (d) water or a solvent. The dibasic esters are be derived from a blend of adipic, glutaric, and succinic diacids, and, in one particular embodiment, the blend comprises dialkyl adipate, dialkyl methylglutarate and dialkyl ethylsuccinate, wherein the alkyl groups individually comprise a C | 06-13-2013 |
20130180926 | PREPARING MALEIC ACID-ISOPRENOL COPOLYMERS - The invention relates to a process for preparing maleic acid-isoprenol copolymers from
| 07-18-2013 |
20130220936 | METHOD TO SUPPORT AN EMISSION-FREE AND DEPOSIT-FREE TRANSPORT OF SULPHIDE IN SEWER SYSTEMS TO WASTE WATER TREATMENT PLANTS AND AGENT FOR USE THEREIN - The present invention concerns a method for the conditioning of septic waste water to prevent the formation of hydrogen sulphide and prevent subsequent precipitation of FeS, also provided is an agent for use in said method. The agent comprises an aqueous solution of iron salts and an anionic polymer. | 08-29-2013 |
20140042099 | Oil Spill Treatment Compositions, Methods of Manufacture, and Methods of Use - An oil spill treatment composition including one or more surfactants formulated to reduce the thickness of oil floating the surface of a body of water, a method for use, and method of manufacturing thereof are disclosed herein. Also disclosed herein are oil spill treatment compositions comprising one or more chemical dispersants and one or more crude or refined oils having the same or similar composition as the oil spill to be treated. Methods for use thereof and methods of manufacture thereof are also disclosed. | 02-13-2014 |
20140110344 | COMPOSITIONS AND METHODS FOR OIL SPILL REMEDIATION - Compositions and methods for remediation of oil spills in a oil spill impacted water environment are described. The methods may further include degrading spilled oil by oxidation or bioremediation. | 04-24-2014 |
20140124451 | SURFACTANT BASED SMALL MOLECULES FOR REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS - The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more GPS-surfactant based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 05-08-2014 |
20140131283 | Multiple Uses of Amine Salts for Industrial Water Treatment - A method for treating in an industrial water treatment system for at least two of metal corrosion inhibition, scale inhibition, suspended matter dispersion, biocide efficacy, or biofilm removal/biofilm dispersion is taught by the use of at least one compound which is a salt derived from a thioamine or an oxyamine and an acid. | 05-15-2014 |
20140319063 | PROCESS TO OBTAIN RANDOM COPOLYMERS DERIVED FROM ITACONIC ACID AND/OR ITS ISOMERS AND SODIUM ALKENYL SULFONATES AND USE OF THE PRODUCT THEREOF - A process for obtaining random copolymers from itaconic acid and/or isomers and sodium alkenyl sulfonates is by polymerization in an aqueous solution via free radicals at an acidic pH in the range from 1.0 to 3.5 and with a redox system as initiator. The copolymers can be used as calcium carbonate and calcium, strontium and barium sulfates mineral scale inhibitors and as dispersants of clays, iron oxides, calcium carbonate and strontium, barium and calcium sulfates. Random copolymers prevent and control damage in an oil reservoir, obstruction of water injection and crude oil production pipelines, and in production rigs due to mineral scale precipitation caused by high levels of salinity of the injection water and formation water. Random copolymers are tolerant to high concentrations of divalent ions, such as calcium, magnesium, strontium and barium, and can be added to the reservoir and to injection or production pipelines, treated water, sea water and water that is used as means of transportation. The copolymers can also be used to inhibit and disperse mineral scale occurring in cooling systems and boilers used in the oil and chemistry industry. | 10-30-2014 |
20140346117 | METHOD FOR INHIBITNG THE PLUGGING OF CONDUITS BY GAS HYDRATES - A method for inhibiting the plugging of a conduit containing a flowable mixture comprising at least an amount of hydrocarbons capable of forming hydrates in the presence of water and an amount of water, which method comprises adding to the mixture an amount of a functionalized dendrimer effective to inhibit formation and/or accumulation of hydrates in the mixture at conduit temperatures and pressures; and flowing the mixture containing the functionalized dendrimer and any hydrates through the conduit wherein the functionalized dendrimer comprises at least one quaternary ammonium zwitterionic functional end group. | 11-27-2014 |
20140360944 | SYSTEM AND METHOD FOR OBTAINING A CELLULAR SAMPLE ENRICHED WITH DEFINED CELLS SUCH AS PLATELET RICH PLASMA (PRP) - The invention relates to a system and method for obtaining a cellular fraction enriched with defined cells effective in promoting a defined cellular response from an in vivo cellular sample comprising: a collection tube for collecting a cell suspension ( | 12-11-2014 |
20150144569 | POLY(ZWITTERION-ALT-SULFUR DIOXIDE) COPOLYMER - The poly(zwitterion-alt-sulfur dioxide) copolymer includes a structural unit having the structural formula: | 05-28-2015 |
20150329390 | PRODUCT AND METHOD FOR TREATMENT OF SOIL AND GROUNDWATER CONTAMINATED WITH POLLUTANTS THAT CAN BE ANAEROBICALLY BIOREMEDIATED - Exemplary products and methods are described for in situ treatment of groundwater or aquifer material that is or may become contaminated with pollutants that can be anaerobically bioremediated. Easily biodegradable organic material and humic material may be injected into the soil in a manner such that portions thereof are carried below the water table to create anaerobic conditions. Thereafter water is injected in an amount sufficient that, with natural groundwater flow, the organic and humic materials are distributed throughout a zone to be treated. | 11-19-2015 |
20150376037 | ION ENHANCEMENT - A method and apparatus for treating a body of water to kill microorganisms by enhancing the concentration metal ions therein. The apparatus comprising a dispenser with a first housing having a water accessible compartment containing 5,5-dimethylhydantoin for releasing the 5,5-dimethylhydantoin when contacted by the body of water and a second housing having a water accessible compartment containing a biocidal metal to the body of water for generating biocidal metal ions when contacted by the body of water containing the 5,5-dimethylhydantoin | 12-31-2015 |
20160060147 | SCALE-INHIBITING POLYMERS AND METHODS FOR PREVENTING SCALE FORMATION - Scale-inhibiting polymers, compositions comprising the scale-inhibiting polymers and methods for preventing scale formation in circulating fluid are provided. The scale-inhibiting polymers comprise two or more recurring monomers wherein in at least one recurring monomer is an allyl-sulfonate-containing monomer, and at least one recurring monomer is a styrene-sulfonate-containing monomer. The polymers, compositions and methods may be used in industrial processes including metal extraction from mineral ores. | 03-03-2016 |
20160083277 | HYDROPHOBICALLY MODIFIED POLYAMINE SCALE INHIBITORS - Hydrophobically modified Si-containing polyamines are useful for treating scale in industrial process streams. Preferred hydrophobically modified Si-containing polyamines are particularly useful for treating aluminosilicate scale in difficult-to-treat industrial process streams, such as in the Bayer alumina process streams, nuclear waste streams and kraft paper mill effluent streams. | 03-24-2016 |
20160115051 | Treatment of Aqueous Systems - A method is described for selecting a treatment additive for aqueous systems, in which crystal habit modification properties are prioritized; for aqueously preparing a substantially poly-maleic additive through in-situ formation of maleic acid copolymer so that mono-carboxylic acids, non-ionic functional groups, and terminal hydroxyl groups are also formed during polymerization; and for applying such additives for treatment of aqueous systems. Treatment agents resulting from these processes are also described. | 04-28-2016 |
210699000 | Phosphorus containing | 14 |
20090294374 | METHOD FOR INHIBITING THE FORMATION AND DEPOSITION OF SILICA SCALE IN AQUEOUS SYSTEMS - A method for inhibiting the formation and deposition of silica and silicate compounds in water systems comprising adding to the water in the water system an effective inhibiting amount of one or more water-soluble polymers of formula | 12-03-2009 |
20120273430 | Method and Composition For Operation Of Evaporative Cooling Towers At Increased Cycles of Concentration - A method and chemical composition are provided which permit operation of evaporative cooling towers at increased cycles of concentration without formation of calcium scale. The method can include first determining the calcium hardness and total alkalinity of the makeup water, calculating the operating cycles of concentration using a formula developed for the specified chemical composition, then dosing the treated water to maintain a constant level of the chemical composition. The method permits scale-free operation of evaporative cooling towers at a minimum of two (2) cycles of concentration over existing technology. | 11-01-2012 |
20130075337 | DISPERSANT FOR SPILLED OIL - A method for dispersing oil spilled into the aqueous environment comprising the treatment of the spilled oil with an oil dispersant composition comprising a phospholipid and a polysaccharide derivative is disclosed. | 03-28-2013 |
20130334141 | METHOD AND COMPOSITION FOR OPERATION OF EVAPORATIVE COOLING TOWERS AT INCREASED CYCLES OF CONCENTRATION - A method and chemical composition are provided which permit operation of evaporative cooling towers at increased cycles of concentration without formation of calcium scale. The method can include first determining the calcium hardness and total alkalinity of the makeup water, calculating the operating cycles of concentration using a formula developed for the specified chemical composition, then dosing the treated water to maintain a constant level of the chemical composition. The method permits scale-free operation of evaporative cooling towers at a minimum of two (2) cycles of concentration over existing technology. | 12-19-2013 |
20140332471 | Pentaerythritol core, phosphonic acid terminated dendrimer and its preparation method - A pentaerythritol core, phosphonic acid terminated dendrimer, its preparation method and application are provided. A preparation method of the pentaerythritol core, phosphonic acid terminated dendrimer (PETA-ADA-12PO | 11-13-2014 |
20150027956 | LOW MOLECULAR WEIGHT PHOSPHORUS-CONTAINING POLYACRYLIC ACIDS AND USE THEREOF AS SCALE INHIBITORS IN WATER-CARRYING SYSTEMS - The invention relates to an aqueous solution of acrylic acid polymers, obtainable by polymerization of acrylic acid in feed mode with peroxodisulfate as initiator in the presence of hypophosphite in water as solvent, wherein
| 01-29-2015 |
210700000 | Nitrogen containing | 8 |
20080223790 | Desalination Scale Inhibitors - A method and composition for processing natural water such as seawater, brackish, and estuarine water wherein the water is concentrated with or without heating comprising adding to the water (I) a water-soluble polymeric phosphonate and (II) a water-soluble polycarboxylate to control scale formation and deposition. Optionally a water-soluble poly[isopropenylphosphonic acid] can also be utilized as component (I) without the addition of component (II). | 09-18-2008 |
20100163494 | PREPARATION OF ENVIRONMENTALLY ACCEPTABLE SCALE INHIBITORS - Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate. | 07-01-2010 |
20110114564 | Preventing Silica And Silicate Scale With Inhibitors In Industrial Water Systems - A method of inhibiting the deposition of silica and silicate compounds on surfaces in water systems by treating the water with an effective amount of an alkoxylated amines or imidized polymer from alkoxylated amines either alone or in combination with acrylic acid or maleic acid homo- or co-polymers and phosphonates. | 05-19-2011 |
20130264289 | METHOD OF SCALE INHIBITION - A method is disclosed to inhibit scale formation in aqueous systems whereby a threshold amount of a scale inhibiting agent, represented by an aminoacid alkylphosphonic acid, is added to the aqueous system. The aminoacid moiety can be represented by α-species or by species having, at least, two or more carbon atoms between the carboxylic moiety and the amine group. These aminoacid based inhibitors exhibit unusually superior performance and system acceptability compared to leading state-of-the-art inhibitors. | 10-10-2013 |
20130341282 | METHOD OF CONTROLLING SCALE IN STEAM GENERATING SYSTEMS - Water soluble or water dispersible terpolymers are employed in high pressure steam generating systems to control deposit formation and contaminant transport in the aqueous medium in such systems. The terpolymer may comprise repeat units formed from acrylic acid, allylalkoxylated ethers, and allylhydroxylated alkyl ether. | 12-26-2013 |
20140190895 | CALCIUM SALFATE SCALE -INHIBITING COMPOSITIONS - The calcium sulfate scale-inhibiting compositions are polyelectrolyte antiscalant compositions for the inhibition of calcium sulfate scale formation in desalination plant feed brine, such as that typically used with reverse osmosis desalination plants. In order to inhibit the formation of calcium sulfate scale, the polyelectrolyte antiscalant compositions are mixed at a concentration between approximately 1 ppm and approximately 50 ppm into the desalination plant feed brine. The polyelectrolyte antiscalant composition may be either poly[disodium 3-(diallylamino)propanephosphonate]-alt-(sulfur dioxide), poly[sodium 5-(diallylcarboxymethylammonio)pentanoate]-alt-(sulfur dioxide), or poly[sodium 5-(diallylcarboxymethylammonio)pentanoate]. | 07-10-2014 |
20140217033 | INHIBITORS FOR ORGANICS SOLUBILIZED IN PRODUCED WATER - A surface active compound is supplied into contact with an oilfield production fluid that comprises a mixture of water and oil including water soluble organics. The surface active compound comprises at least one alkoxylate chain and at least one end group attached to each of the at least one alkoxylate chain. The surface active compound is supplied into the oilfield production fluid at a dosage rate that is effective to self-associate at interfaces between the water and oil and inhibit the water soluble organics in the oil from entering the water when the oilfield production fluid is depressurized. | 08-07-2014 |
20140319064 | Ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer and its use as antiscalant - A preparation method of ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer and application thereof is provided, wherein terminal amino groups of ethylenediamine core, 0 generation, PAMAM dendrimer is modified by methylene phosphonic acid. The ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer has an excellent performance to inhibit scales of CaCO | 10-30-2014 |
210701000 | Acrylic polymer | 12 |
20080223791 | METHOD FOR TREATING FEEDWATER - A method for treating feedwater is provided. The method includes steps of introducing a treatment composition into a feedwater stream to provide a treated feedwater stream containing scale inhibitor at a concentration of at least about 0.1 ppm, and combining the treated feedwater stream with a detersive composition. The scale inhibitor can include a phosphate scale inhibitor, a carbonate scale inhibitor, or a combination of a phosphate scale inhibitor and a carbonate scale inhibitor. The detersive composition can be provided as a cleaning composition, a rinse agent composition, or a drying agent composition. A treatment composition and an apparatus for treating feedwater are provided. | 09-18-2008 |
20090008335 | Use of Copolymers for Reducing Precipitates and Deposits from Inorganic and Organic Impurities in the Bayer Process for the Extraction of Aluminium Hydroxide - Use of water-soluble copolymers, said copolymers composed of monoethylenically unsaturated, acid group-bearing monomers a) and at least one hydrophobic component b) which contains unsaturated double bonds in Bayer process caustic solutions as agents for reducing precipitation and formation of scales by inorganic and organic impurities. | 01-08-2009 |
20090101587 | METHOD OF INHIBITING SCALE FORMATION AND DEPOSITION IN DESALINATION SYSTEMS - This invention relates to an improved method of inhibiting corrosion and calcium sulfate and calcium carbonate scaling in thermal and membrane desalination processes. The method includes adding a composition having an acrylic acid 2-acrylamido-2-methylpropyl sulfonic acid copolymer, optionally combined with an oligomeric phosphinosuccinic acid to seawater or recirculation brine in a desalting process to produce water for drinking and industrial applications. The method also includes adding a composition including mono, bis, and oligomeric phosphinosuccinic acid adducts to the desalting process. | 04-23-2009 |
20100051559 | METHOD FOR INHIBITING SCALE FORMATION AND DEPOSITION IN MEMBRANE SYSTEMS VIA THE USE OF AN AA-AMPS COPOLYMER - A method of inhibiting scale formation and deposition from a feed stream passing through a membrane system is disclosed. The method comprises: (a) controlling the pH of said feed stream within the range between about 7.0 and about 8.2; (b) optionally controlling the temperature of said feed stream within the range between about 5° C. to about 40° C. when the membrane system is an RO system, a NF system, an ED system, an EDI system or a combination thereof; (c) optionally controlling the temperature of said feed stream within the range between about 40° C. and about 80° C. when the membrane system is an MD system; and (d) adding an effective amount of a scale inhibitor to said feed stream, said scale inhibitor comprises an AA-AMPS copolymer. | 03-04-2010 |
20140183140 | FLUORESCENT MONOMERS AND TAGGED TREATMENT POLYMERS CONTAINING SAME FOR USE IN INDUSTRIAL WATER SYSTEMS - The invention is directed towards methods and compositions for making and using fluorescent monomers which are synthesized by reacting a substituted or non-substituted benzoxanthene anhydride with an amine and with a moiety containing a polymerizable group. Such monomers are useful for the preparation of tagged treatment polymers. Such tagged treatment polymers are useful as scale inhibitors in industrial water systems. | 07-03-2014 |
20140263078 | FOULING MITIGATION IN EQUIPMENT USED DURING HYDROCARBON PRODUCTION - Methods for dispersing foulants are disclosed herein. Various effective dispersant compositions are also disclosed. The dispersant composition can include a silt dispersant and a hydrocarbon dispersant. Generally, the silt dispersant can be a homopolymer or a copolymer of one or more monomers, and the monomers can be one or more of acrylic acid, methacrylic acid, α-halo acrylic acid, maleic acid, itaconic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, β-carboxylic acrylate, and their salts. The silt dispersant can also be a terpolymer of acrylic acid, acrylamide, and sulfonated acrylamide. The hydrocarbon dispersant can be a non-ionic surfactant or a nonylphenol or a nonylphenol ethoxylate, such as a high EO 9 Nonyl phenol resin. Also disclosed are methods for preventing or reducing fouling in equipment that contacts water used during a hydrocarbon production process. | 09-18-2014 |
20140319065 | AUGMENTED POLYACRYLATE ANTI-SCALE MEDIA AND METHODS OF MAKING THE SAME - A scale suppression media and methods of making augmented polyacrylate resin beads combined with a directing agent to facilitate the formation of calcite and aragonite forms of calcium carbonate, the directing agent deposited directly into said polyacrylate resin beads. A strong acid monovalent salt, such as a metal ion, is added to the polyacrylate resin, and is adapted to be time released, and templates the calcium carbonate in the influent to form crystals in the water with reduced deposition of scale on the surfaces of material in contact with the water. The pores of the resin are filled with metal templating agent, and the agent is released as the influent passes over the resin. | 10-30-2014 |
20140326675 | RHEOLOGY MODIFYING AGENTS FOR SLURRIES - Rheology modifying agents and methods of modifying the rheology of a slurry are disclosed, in addition to methods for the prevention of fouling. The slurry can be a lime slurry or a magnesium oxide slurry. The rheology modifying agent can be a low molecular weight anionic polymer, a high molecular weight polymer, a mixture of a low molecular weight anionic polymer and a high molecular weight polymer, a mixture of a high molecular weight polymer and a chelating agent, and a mixture of a chelating agent, a high molecular weight polymer, and a low molecular weight anionic polymer. | 11-06-2014 |
20150076074 | SYNERGISTIC SILICA SCALE CONTROL - A method for controlling colloidal/amorphous silica scale deposition in an aqueous system is described, which comprises adding to the aqueous system an effective amount of a synergistic combination comprising: A) 10% to 90% by weight of at least one carboxylate polymer comprising units derived from one or more carboxylate monomers; and B) 90% to 10% by weight of at least one chelating agent, based on the total weight of said synergistic combination. The carboxylate polymer may be a homopolymer of (meth)acrylic acid, maleic acid, itaconic acid, or their salts, or a copolymer of one or more monomers selected from meth)acrylic acid, maleic acid, itaconic acid, and their salts and, optionally, one or more sulfonic-free ethylenically unsaturated monomers. The chelating agent may be one or more of: methylamine, ethanolamine methylethanolamine (MEA), ethylenediamine (EDA), diethylenetriamine (DETA), ethylenediamine tetraacetic acid (EDTA), ethylenediamine disuccinic acid (EDDS), iminodiaacetic acid (IDA), tetrasodium ethylene diaminetetraacetic acid, and derivatives thereof, among others. | 03-19-2015 |
20160046515 | METHOD FOR PREVENTING SCALE DEPOSITION AND SCALE INHIBITOR - An object of the invention is to provide a method for preventing scale deposition that can prevent deposition of calcium fluoride scale without increasing phosphorus concentration in a fluorine-containing water system. Provided is a method for preventing scale deposition comprising adding a phosphorus-free maleic acid/ethyl acrylate/vinyl acetate copolymer to a fluorine-containing water system. The phosphorus-free copolymer is preferably a polymer obtained by copolymerization of monomer components containing maleic acid at a rate of 60 mol % or more, ethyl acrylate, and vinyl acetate. It preferably has a weight-average molecular weight of 500 to 5000. | 02-18-2016 |
20160075580 | METHOD FOR REMOVING SCALES IN STEAM GENERATION FACILITY - Provided is a method for removing a scale in a steam generation facility, whereby it becomes possible to remove a scale deposited on the inside of a boiler vessel during the operation of a boiler without causing corrosion of the boiler. A method for removing a scale in a steam generation facility is disclosed, wherein in the steam generation facility, a pH of boiler water is adjusted to 11.3 or more, and a polyacrylic acid having a weight average molecular weight that is 0.50 to 2.00 times a reference weight average molecular weight as calculated from the following calculation formula (1), or a salt thereof, is added in accordance with the pH value of the boiler water during the operation of a boiler, thereby removing a scale deposited on the inside of a boiler vessel: | 03-17-2016 |
20160176995 | SCALE INHIBITOR COMPOSITIONS AND METHODS OF USING | 06-23-2016 |