Class / Patent application number | Description | Number of patent applications / Date published |
210729000 | Utilizing organic precipitant | 55 |
20080257827 | USE OF SILICON-CONTAINING POLYMERS TO IMPROVE RED MUD FLOCCULATION IN THE BAYER PROCESS - The suspended solids content of a Bayer process stream is reduced by contacting the stream with silicon-containing polymers. | 10-23-2008 |
20090200243 | METHOD OF TREATING SEALING COMPOUND AND APPARATUS FOR TREATING THE SAME - [Problem to be Solved] To provide a method of treating a sealing compound that can efficiently separate and recover a used sealing compound into rubber latex and a liquid constituent, and also simplify the treatment of the rubber latex and liquid constituent separated from the used sealing compound. | 08-13-2009 |
20140197112 | POTABILISATION METHOD - A potabilisation method of a water to be treated, containing a coagulation-flocculation step wherein the step includes: a) a step of adding a liquid composition including a solubilized cationic starch to the aqueous solution to be treated; b) a step of adding one or several metal salts selected from ferric salts and aluminum salts to the aqueous solution to be treated; steps a) and b) being carried out in any order and being carried out either separately, simultaneously or using a liquid composition including both the solubilized cationic starch and the metal salt, the steps a) and b) being followed: c) by a step of stirring the supplemented aqueous solution; d) by a step of separating the coagulated solids by sedimentation or floatation; e) by a step of recovering a purified water; the liquid composition including cationic starch having a viscosity, measured according to test A, higher than 1000 mPa·s. | 07-17-2014 |
20150360989 | Dispersant Enhanced Ballast Recovery - Disclosed are apparatus and methods for treating wastewater. In one example there is provided a wastewater treatment system. The wastewater treatment system comprises a separation vessel including a separator inlet and a settled sludge outlet, a source of treated wastewater including a ballast material configured and arranged to introduce the treated wastewater into the separation vessel, a separator configured and arranged to separate ballast from settled sludge output from the settled sludge output of the separation vessel, a sludge conduit providing fluid communication between the settled sludge outlet and the separator, and a source of dispersant configured and arranged to introduce dispersant into the settled sludge prior to separation of the ballast from the settled sludge in the separator. | 12-17-2015 |
20160002077 | PERCHLORATE REMOVAL FROM AQUEOUS INDUSTRIAL LIQUIDS - The invention provides processes for purification of aqueous industrial liquids from perchlorate ions by reducing perchlorate ion concentration or by precipitating a water-insoluble perchlorate salts. | 01-07-2016 |
20160176735 | USE OF PERCARBOXYLIC ACIDS FOR SCALE PREVENTION IN TREATMENT SYSTEMS | 06-23-2016 |
210730000 | From natural source or chemical modification thereof | 10 |
20090266769 | METHODS FOR RECOVERING TALLOW FROM WASTEWATER - A method for recovering tallow from meat processing wastewater includes adding a coagulant composition to the wastewater to agglomerate suspended fat, oil and grease particles in the wastewater, separating solid waste materials from the wastewater and isolating tallow from the solid waste materials. The coagulant composition includes tannin. | 10-29-2009 |
20130105402 | METHOD FOR CLARIFYING A WINE SEDIMENT | 05-02-2013 |
20130299433 | PLANT-DERIVED FLOCCULANT, FLOCCULANT MIXTURE, METHOD OF FLOCCULATION, AND METHOD FOR PREPARING PLANT-DERIVED FLOCCULANT - Disclosed are a plant-derived flocculant and a flocculant mixture having a higher flocculation capacity. The plant-derived flocculant comprises at least one of a dried matter of | 11-14-2013 |
20140076823 | PAINT COAGULATION USING FATTY ACIDS - The present invention relates to the use of fatty acids, finely dispersed in water, as detackifying agents in the industrial elimination of dispersed solids, in particular of paint particles dispersed in recirculating water in the context of wet scrubbing of paint overspray in paint booths, from an aqueous carrier medium that represents, in particular, recirculating water of a paint booth with wet scrubbing. The fatty-acid-based detackifying agent can be used in a manner entirely free of corrosive anions, so that energy recovery from the paint coagulate that is removed from the recirculating water can be operated cost-effectively. | 03-20-2014 |
20150144574 | POLYSACCHARIDE AGENTS AND METHODS OF THEIR USE FOR REMOVING SOLIDS FROM WATER - Polysaccharide agents for removing solids from an aqueous suspension and methods for using the polysaccharide agents to remove solids from an aqueous suspension. | 05-28-2015 |
210731000 | Starch | 5 |
20100155338 | Method for the cationisation of legume starches, cationic starches thus obtained applications thereof - A novel solvent-free method for the cationisation of a legume starch, and uses of the cationic starches thus obtained, in aqueous compositions and the paper industry, including the folding carton or paper thus obtained. | 06-24-2010 |
20130153511 | PROCESS FOR DEWATERING OF OIL SAND TAILING MUDS - The present invention relates to a process for dewatering oil sand tailing muds, comprising: (a) adding a flocculant into oil sand tailing muds and mixing the flocculant and the tailing muds; (b) filtering the flocculated tailing muds using a dynamic filtration system, wherein in step (b) a pressure difference is applied over the filter and wherein the dynamic filtration system comprises a means for producing a dynamic action by which the filter cake is continuously or intermittently moved, deformed and/or broken, the filter cake being the solidified material that sets on the filter during filtration. The process is useful for dewatering oil sand tailing muds from tailing ponds, such as those produced in the Athabasca Oil Fields in Canada. | 06-20-2013 |
20130180927 | FORMALDEHYDE-FREE LIGNIN-AMINE COAGULANTS - A method for making lignin-amines is provided. The method comprises providing a lignin; then modifying the lignin with modifier to create a modified lignin; and then reacting the modified lignin with an amine to form a lignin-amine. Suitable modifiers comprise acrylates. A method for coagulating suspended materials in a water stream is also disclosed. The method comprises providing a water stream and contacting the suspended materials in the water stream with at least one lignin-amine. | 07-18-2013 |
20140353257 | COMPOSITIONS FOR WATER TREATMENT AND METHODS OF USING THEREOF - Described herein are compounds and compositions useful for removing contaminants from water, as well as methods for making and using the compounds and compositions. In one aspect, the compositions contain a source of gallium ions and a polysaccharide such as chitosan, which are inexpensive and safe for the environment. | 12-04-2014 |
20150315056 | METHOD FOR THICKENING OR DEHYDRATING SLUDGE - Disclosed is a method for thickening or dehydrating sludge, which includes at least: a) a step of adding flocculants to the sludge to be treated; b) a step of flocculation by agitation of the sludge with the flocculants thus added in order to form a mixture of flocks and an aqueous solution; c) a step of mechanical separation of the flocks and the aqueous solution formed during the preceding step; d) a step of recovering the aqueous solution and the flocks that make up a treated sludge; wherein: the added flocculants are made up of at least one cationic starch (A) and at least one cationic polyacrylamide (P); the cationic starch or starches (A) including a fixed weight percentage of nitrogen of at least 2%; and the weight ratio (R) mA/(mA+mP), expressed as solids, is included between 0.6 and 0.99. | 11-05-2015 |
210732000 | Synthetic polymer | 39 |
20090101589 | Method for removing hydrazine compounds - Disclosed are methods for removing hydrazine compounds from solutions. Solutions containing hydrazine compounds are contacted with crosslinked polyvinylpyrrolidone. | 04-23-2009 |
20100006510 | Treatment of Aqueous Suspensions - A process in which a suspension comprising dispersed particulate material in an aqueous medium is transferred as a fluid to a deposition area, then allowed to stand and rigidify, and in which rigidification is improved whilst retaining the fluidity of the suspension during transfer, by combining with the suspension during transfer a rigidifying amount of a treatment system which comprises i) a water-soluble synthetic polymer and ii) a water-soluble natural or seminatural polymer. Improved rigidification can be achieved, including dose efficiency especially in regard to the amount of synthetic polymer required. In addition improvements in the clarity of liquor released from the suspension can be achieved. | 01-14-2010 |
20100224568 | USE OF SILICA FOR THE REMOVAL OF ORGANOSILANES - A method of removing organosilanes from a sample which involves contacting the sample with silica and allowing the organosilanes to couple to the surface of the silica. The silica can be provided as particles that are added to and mixed with the sample, or provided as a reactive filter media to which the sample is contacted. | 09-09-2010 |
20110000857 | METHOD AND SYSTEM OF SLUDGE TREATMENT - A sludge dewatering system that includes a reactor to apply an electric field across at least a portion of the volume of the sludge and a dewatering station to dewater the sludge. The dewatering system may include one or more bypass lines so that at a portion of volume the sludge bypasses particular stages of the system. The dewatering station may use, for example, pressing or a centrifuge. | 01-06-2011 |
20120175315 | Process for Flocculating and Dewatering Oil Sand Mature Fine Tailings - A process for dewatering oil sand fine tailings is provided and comprises a dispersion and floc build-up stage comprising in-line addition of a flocculent solution comprising an effective amount of flocculation reagent into a flow of the oil sand fine tailings; a gel stage wherein flocculated oil sand fine tailings is transported in-line and subjected to shear conditioning; a floc breakdown and water release stage wherein the flocculated oil sand fine tailings releases water and decreases in yield shear stress, while avoiding an oversheared zone; depositing the flocculated oil sand fine tailings onto a deposition area to form a deposit and to enable the release water to flow away from the deposit, preferably done in a pipeline reactor and managing shear according to yield stress and CST information and achieves enhanced dewatering. | 07-12-2012 |
20130026106 | OPTIMIZED FLOCCULATION OF ALGAE USING CATIONIC POLYMERS - A concentration of cationic polymer is able to floc algae cells in about 30 minutes compared to the 30+ hours for the cells to flocculate and settle without additives. The addition of the polymer requires less than 1 wt % polymer to complete the algae floc and does not require large amounts of energy to perform or extra processing steps to recover the flocculent. | 01-31-2013 |
20140124454 | WATER TREATMENT COMPOSITION AND METHOD OF USING SAME - A water treatment composition includes a water soluble film formed into a sealed pouch. The pouch contains a composite of a phosphate removing substance, a polymer flocculant, or an enzyme, or any combination. The phosphate removing substance, the polymer flocculant, and the enzyme are bound to each other within the composite. The pouch is added to a body of water. The pouch dissolves to release the compounds and treat the water. | 05-08-2014 |
20140246377 | COMPOSITION COMPRISING A NON-IONIC SURFACTANT AND AN IONIC POLYMER - The invention relates to compositions, preferably solid compositions, comprising a non-ionic surfactant and an ionic polymer, methods for their preparation and their use. The compositions are useful inter alia as flocculation auxiliaries for solid-liquid separation processes, for example in sludge dewatering/waste water purification and as retention aids or other additives in paper manufacture. | 09-04-2014 |
20140319071 | POLYMER DISSOLUTION SYSTEM - The present invention is directed to a polymer dissolution system comprising a mix tank, a strainer, and a pump. The mix tank is configured to receive polymers, water, and an inlet stream, to form a polymer solution including swollen polymers, and to discharge the polymer solution. The strainer is configured to receive the polymer solution, and to withdraw at least a portion of the swollen polymers therethrough substantially without shear degradation, thereby forming a resultant solution, wherein the swollen polymers are dissolved at least in part. The pump is configured to receive the resultant solution, and to return the resultant solution to the inlet stream. In some embodiments, the strainer and the pump cooperate together to maintain a viscosity of the resultant solution substantially within a predetermined range. | 10-30-2014 |
20150090668 | LIQUID TREATMENT REFINING, RECYCLING AND TESTING DEVICE - A mobile water treatment facility may include, in one example operation, receiving used, dirty and/or waste water from a well or other source. The water may then be prepared for a treatment cycle by modifying the water and applying a voltage to the water inside an electrode array in order to remove the sediment from the water to provide recycled water for continued use. The process may be performed by a full capacity device or via a mobile treatment and testing unit that operates by cycling the water at a smaller volume and rate for analysis and testing purposes prior to engaging a full flow-rate treatment device. | 04-02-2015 |
20150321936 | METHOD FOR RESIN, SOLIDS, AND SLUDGE SOLIDIFICATION, STABILIZATION, AND REDUCTION OF DISPOSAL VOLUME - A method for solidification of a waste material is provided. The method includes removing excess water from the waste material, mixing at least one polymer with the waste material to provide a polymer-waste mixture, and curing the polymer in the polymer-waste mixture to provide a solidified monolith waste form having a continuous polymer matrix encapsulating the waste material. | 11-12-2015 |
20160100135 | METHOD OF MONITORING AND CONTROLLING DEWATERING OF OIL SANDS TAILINGS - A method for monitoring dewatering of flocculated oil sands tailings involves positioning an image capture device in a flow of flocculated oil sands tailing through a pipeline for acquiring images of the flocculated oil sands tailings; collecting the images of the flocculated oil sands tailings; and analyzing the one or more images to ensure production of optimum floc structures for maximum oil sands fine tailings dewatering. | 04-07-2016 |
20160115064 | METHOD AND FACILITY FOR THE FORCED DEWATERING OF A SLUDGE OF SALINE RESIDUES - A method for the forced dewatering, by pressing, of saline residues produced by drinking water production, or by the treatment of municipal or industrial wastewaters, in which method the saline residues are introduced into the cylinder ( | 04-28-2016 |
20160185613 | Water-in-Oil Emulsion Compositions and Methods for Making and Using the Same - The suspended solids content of a process stream in a process for producing alumina is reduced by contacting the stream with silicon-containing polymers provided by water-in-oil compositions. | 06-30-2016 |
210733000 | Acrylic | 16 |
20100108616 | CHEMICAL COMPOSITION AND PROCESS FOR TREATING GEOTECHNICAL SLURRIES - The invention relates to a dispersing agent composition and to a process for treating liquid slurries of bentonite particles, optionally comprising contaminating solids, in order to remove any contaminating solids and/or the bentonite particles, wherein said dispersing agent composition is added to said slurry causing contaminating solids and/or the bentonite particles to settle without flocculation. | 05-06-2010 |
210734000 | Nitrogen containing (e.g., amine, azo, etc.) | 15 |
20080210638 | DUAL INJECTION OF TWO POLYMERIC FILTRATION AIDS FOR GYPSUM REMOVAL FROM PHOSPHORIC ACID/GYPSUM SLURRY - A process to improve the polymeric filtration aid performance used in removal of gypsum from phosphoric acid/gypsum slurry. A synergistic effect has been observed by using a Dual Injection method. This method more specifically involves using two polymers (A & B) of different chemistry and injecting into slurry at a different time. The polymer chemistry of filtration aid A is selected from the group consisting of non-ionic, anionic, and cationic polymers and the polymer chemistry of filtration aid B is selected from the group consisting of sulfonated polymers. The polymer (A & B) usage is reduced by around 50% and performance improved. | 09-04-2008 |
20090095688 | INSTALLATION FOR THE FLOCCULATION OF SLUDGE LOADED WITH SUSPENDED MATTER, METHOD USING THE INSTALLATION - Installation for flocculation of water or sludge loaded with suspended matter comprising in succession: a polymer storage hopper, a polymer grinding device, and a line, pipe or other conveyor for transferring the polymer solution to the water or the sludge to be treated. The grinder device includes a wetting cone in which the polymer is poured, and at the bottom end of the cone: a chamber for grinding and removing the dispersed polymer comprising: a rotor, a stator, and a ring fed by a secondary water circuit. A method implementing the installation is also provided. | 04-16-2009 |
20100237020 | DEWATERING PROCESS - A process of dewatering an aqueous suspension comprising treating the suspension with a dewatering amount of a reverse phase polymer, and subjecting the suspension to a mechanical dewatering to form a cake, | 09-23-2010 |
20100326923 | HIGH PERFORMANCE LOW ENVIRONMENTAL IMPACT DETACKIFIER - The current invention relates to composition and method for treating impurities in a circulating water system. The circulating water system impurities may be oversprayed paint in paint spray booth applications. The composition includes an aqueous solution of a cationized starch, a polybasic aluminum salt such as aluminum chlorohydrate or polyaluminum chloride and a solution of a medium to high MW aqueous flocculent. The composition is particularly useful when added to recirculating scrubber water in paint spray booths for effectively treating both water based and solvent based paints. | 12-30-2010 |
20110155671 | Concentration of Suspensions - The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidising agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener. | 06-30-2011 |
20110297622 | TREATMENT ADDITIVES, METHODS FOR MAKING AND METHODS FOR CLARIFYING AQUEOUS MEDIA - A coagulant composition includes chitosan, methacryloyloxyethyltrimethyl ammonium methyl sulfate and a redox initiator. A coagulant, method for making the coagulant and clarifying wastewater is also provided. | 12-08-2011 |
20120138543 | FLOCCULATION METHOD - A charged particle polymer hybrid (CPPH) flocculant is taught, comprising sub-micron size charged particles and a polymer which has been polymerized in the presence of the charged particles wherein the intrinsic viscosity of the hybrid polymer flocculant is less than 930 ml/g. A method is provided for producing freely draining flocculated sediment from a suspension comprising finely divided solids in water. The method comprises dispersing, at increasing concentrations, a charged particle polymer hybrid (CPPH) flocculant into the suspension to determine a starting plateau concentration of CPPH flocculant above which concentration no further increase in the solids loading of the produced floccules is observed. Then, the concentration of dispersed CPPH flocculant in the suspension is maintained at or above the starting plateau concentration. A method is further provided for separating fine solids and water from a suspension comprising finely divided solids in water. The method involves dispersing, at increasing concentrations, a charged particle polymer hybrid (CPPH) flocculant into the suspension to determine a starting plateau concentration of CPPH flocculant above which concentration no further increase in the solids loading of the produced floccules is observed. Then, the concentration of dispersed CPPH flocculant in the suspension is maintained at or above the starting plateau concentration. The dispersion of CPPH flocculant in the suspension is agitated and the solid floccules are then separated from the supernatant liquid. | 06-07-2012 |
20130153512 | TREATMENT OF SURFACTANT LADEN WASTEWATER - Clarification of surfactant laden wastewaters of the type commonly encountered in the laundry, dishwashing, textile manufacturing, and metal cleaning and degreasing processes is provided by use of a chitosan/(meth)acrylyloxy alkyl quaternary ammonium salt graft polymer. | 06-20-2013 |
20130186838 | METHOD FOR DISPERSING AND AGGREGATING COMPONENTS OF MINERAL SLURRIES AND HIGH-MOLECULAR WEIGHT MULTIVALENT POLYMERS FOR CLAY AGGREGATION - The disclosure relates generally to the use of polymers to assist in aggregating mineral components in aqueous mineral slurries to release and separate individual components of the slurry, which may then be recovered from the slurry. | 07-25-2013 |
20140158634 | POLYMER BLENDS FOR FLOCCULATION - Polymer flocculants are described comprising blends of high molecular weight polyethylene oxide and high molecular polyacrylamides. When introduced in desired amounts and with desired molecular weight ranges, excellent flocculation function is found that can be used to reduce polymer consumption to obtain a desired purity of clarified waste water. It has been found that the desirable polymer blends can be effectively added upstream from locations in which polyethylene oxide would generally be added so that the polymer blend can effectively mix with the slime flow to reduce or eliminate the need for excess polymer use to compensate for less effective mixing with the slime flow. Suitable waste treatment systems are described to provide for the delivery of the flocculants in the waste treatment process. | 06-12-2014 |
20140238943 | Method For Treating Suspensions Of Solid Particles In Water Using Post Hydrolyzed Polymers - A method for treating a suspension of mineral particles in water, such as mineral tailings, includes the step of contacting the suspension of mineral particles in water with a specific water-soluble polymer. This polymer is preferably a water-soluble polymer having an anionicity of between 10 to 55 mol %, and more preferably 20 to 50 mol %. Furthermore, this polymer has preferably a molecular weight between 15 and 40 million daltons, and more preferably between 18 and 30 million. The method involves adding the specific polymer into a thickener containing the tailings to treat, and/or during transport of the suspension to a deposition area for dewatering and solidification, or to the tailings to treat followed by a mechanical treatment such as centrifugation, screw press and filtration. | 08-28-2014 |
20150053623 | PARTICLE SUSPENSIONS OF FLOCULATING POLYMER POWDERS - Flowable liquid suspensions are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyacrylamide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The suspension allows the use of fine powders while reducing potential air quality and safety issues. The suspensions generally settle when mixing is stopped, but a uniform dispersion results when the suspensions are mixed, and the mixed suspensions can be delivered for use. The flocculant suspensions can be used for waste water purification, fiber dewatering, and the like. | 02-26-2015 |
20160052807 | USE OF SILICON-CONTAINING POLYMERS TO IMPROVE RED MUD FLOCCULATION IN THE BAYER PROCESS - The suspended solids content of a Bayer process stream is reduced by contacting the stream with silicon-containing polymers. | 02-25-2016 |
20160130375 | POLYMER COAGULANTS - Maleic anhydride polymers having pendant groups that contain at least one quaternary amine group are effective coagulants for use in treating wastewater and other waters containing dispersed impurities. | 05-12-2016 |
20160159660 | SILICON CONTAINING POLYMER FLOCCULANTS - Disclosed herein are silicon containing polymers and compositions containing the same able to flocculate suspended solids in the Bayer or Sinter process stream. | 06-09-2016 |
210735000 | Nitrogen containing (e.g., amine, azo, etc.) | 9 |
20100006511 | TREATMENT ADDITIVES AND METHODS FOR TREATING AN AQUEOUS MEDIUM - A method for clarifying an aqueous medium containing suspended material is provided. The method includes dispersing a treatment additive in the aqueous medium containing the suspended material for coagulating and flocculating the suspended material and then separating the suspended material from the treated aqueous medium. The treatment additive includes a crosslinked diallyldialkylammonium halide polymer having from about 0.001 molar percent to less than 0.1 molar percent of a crosslinking agent. A treatment additive composition is also provided. | 01-14-2010 |
20120125863 | METHODS OF PREPARING NOVEL HALIDE ANION FREE QUATERNARY AMMONIUM SALT MONOMERS, POLYMERIZATION METHODS THEREFOR, AND METHODS OF USE OF THE RESULTING POLYMERS - Methods are provided for making halide-free quaternary ammonium salt monomers. Polymers prepared from the monomers and methods of using the polymers to clarify raw, untreated water or wastewater are also disclosed. | 05-24-2012 |
20120211434 | USE OF PVPP TO REMOVE CONTAMINANTS FROM PRODUCED WATER OF AN OIL OR GAS WELL - A method of removing contaminants from produced water of an oil or gas well comprising the step of contacting the produced water with polyvinylpolypyrrolidone (PVPP) to remove the contaminants from the water. | 08-23-2012 |
20140360946 | HYPERBRANCHED POLYMERS - There is disclosed certain hyperbranched polyester amides with a cloud point of at least 50° C. with end groups selected from: betaine-type end groups useful in various end uses such as a flocculant. | 12-11-2014 |
20150021274 | HYPERBRANCHED POLYMERS - There is disclosed certain hyperbranched polyester amides with a cloud point of at least 50° C. in water with end groups selected from: two or more i] tertiary amine functional end groups ii) ammonium functional end groups, iii) polyalkylene glycol functional end groups; iv) quaternary ammonium zwitterionic end groups and/or v) other ionic groups (such as phosphate or sulfate), that are useful in various end uses such as a flocculant. | 01-22-2015 |
20160137784 | HYPERBRANCHED POLYMERS - There is disclosed certain hyperbranched polyester amides with end groups selected from: esters or amides of betaine-type end groups useful in various end uses such as a flocculent. | 05-19-2016 |
210736000 | Derived from alkyl halide or epihalophydrin reactant | 3 |
20110089119 | TREATMENT ADDITIVES AND METHODS FOR TREATING AN AQUEOUS MEDIUM - A method for clarifying an aqueous medium containing suspended material is provided. The method includes dispersing a treatment additive in the aqueous medium containing the suspended material for coagulating and flocculating the suspended material and then separating the suspended material from the treated aqueous medium. The treatment additive includes a crosslinked diallyldialkylammonium halide polymer having from about 0.001 molar percent to less than 0.1 molar percent of a crosslinking agent. A treatment additive composition is also provided. | 04-21-2011 |
20140131284 | FUNCTIONALIZED CATIONIC POLYAMINES AND THEIR USE TO REDUCE THE NDMA FORMATION DURING THE TREATMENT OF AQUEOUS SYSTEMS, AND APPLICATIONS IN THE WATER TREATMENT INDUSTRY, INCLUDING WASTEWATER AND DRINKING WATER TREATMENT PROCESSES - New water treatment chemicals and corresponding water treatment or more generally aqueous systems treatment processes are provided, which greatly attenuate the NDMA problem, that is, decrease the formation of NDMA during the water or aqueous system treatment namely in the presence of a disinfectant, and decrease too the level of NDMA in the so treated water of aqueous system, and in the end products such as drinking water. | 05-15-2014 |
20160159674 | METHODS AND SYSTEMS FOR REDUCING BIOFOULING OF MICROFILTRATION MEMBRANES - Systems and methods for reducing biofouling of microfiltration membranes that are biofouled with biological substances are disclosed. The methods include providing impound water containing biomolecule-based exopolymeric substances, reacting with calcium oxide or calcium hydroxide, encapsulating the exopolymeric substance into filterable non-tacky particles by reacting with an inorganic coagulant and a low molecular weight polymer, and microfiltering to remove the filterable non-tacky particles encapsulating the exopolymeric substances. The filterable non-tacky particles encapsulate the exopolymeric substances and prevent the exopolymeric substances from biofouling the microfiltration membranes. | 06-09-2016 |