Class / Patent application number | Description | Number of patent applications / Date published |
210673000 | Utilizing gas, water, or chemical oxidizing or reducing agent | 30 |
20080257824 | Method and Apparatus for Water Purification and Regeneration of Micro-filtration Tubules - A method of water purification by submicron filtration deploys a 6-way valve to periodically flush or clean the tubules in a predetermined selection of cleaning steps, some of which optionally introduce and then flush out chemical cleaning agents. The tubules are cleaned without disassembly of the filtration cartridge. | 10-23-2008 |
20080277349 | Reactive Filtration - In one embodiment, a reactive filtration method includes continuously regenerating a reactive filter media while simultaneously filtering contaminants from fluid flowing through the filter media. In one embodiment, regenerating the reactive filter media comprises mixing metal granules with the filter media and agitating the mixture. In another embodiment, regenerating the reactive filter media comprises introducing a metal in the fluid flowing through the filter media and agitating the filter media. In one embodiment, a method for removing phosphorus, arsenic or a heavy metal from water includes introducing a metal salt reagent into the water at a molar ratio of 5:1 to 200:1 to the phosphorous or the arsenic in the water and passing the water through a bed of moving sand. | 11-13-2008 |
20090039027 | PURIFICATION OF WATER - A process for providing water with a lowered salinity and which produces at least one recoverable waste stream containing a useful by-product, the process including treating raw water which includes an undesirably high concentration of cations, including Ca | 02-12-2009 |
20090101585 | Chromatographic methods - The current invention comprises a method for the regeneration of a cation exchange chromatography column. | 04-23-2009 |
20090236288 | METHOD FOR SEPARATING MULTIVALENT METAL IONS - A method and apparatus are described for removing iron cations and/or zinc cations from an autodeposition coating bath by passing a limited number of bed volumes through a column containing a gel type SAC IEX resin when iron cations are to be removed and passing a substantially larger number of bed volumes through the column when zinc cations are to be removed. To prevent clogging when zinc cations are being removed the direction of the flow through the column is periodically reversed. | 09-24-2009 |
20090261042 | METHOD FOR ADSORPTION OF FLUID CONTAMINANTS AND REGENERATION OF THE ADSORBENT - The invention provides methods for treating a fluid, particularly water, contaminated with organic compounds, organisms, toxic substances, hazardous substances, ammonia, or mixtures thereof, by adsorption with an adsorbent material and regeneration of the purified adsorbent material. The contaminants may be first adsorbed onto the adsorbent material, which is then regenerated by treatment with nanoparticles of at least one transition metal oxide catalyst and at least one oxidant; or the contaminants are adsorbed onto particles of the adsorbent material loaded with at least one transition metal oxide, which is then regenerated by treatment with an oxidant; or the contaminated fluid is treated with an oxidant first and then with particles of the adsorbent material loaded with at least one transition metal oxide. The adsorbed contaminants are converted into environmentally compatible products. | 10-22-2009 |
20090277842 | METHOD FOR REGENERATING IONIC EXCHANGE RESINS USED FOR SOFTENING WATER AND DEVICE FOR SOFTENING WATER - In a method for regenerating ionic exchange resins ( | 11-12-2009 |
20100051556 | Methods of purifiying water using waste brines to regenerate ion-exchange resins - Water is purified by ion-exchange. The ion-exchange resins are regenerated by contacting the resins with waste brines previously discarded, thus to improve the economics of discarding the waste brines and, in appropriate cases, providing for recovery of valuable by-products. | 03-04-2010 |
20100096332 | Treatment of contaminated water streams from coal-bed-methane production - A method for treating contaminated water streams resulting from the production of coal-bed-methane. | 04-22-2010 |
20100193444 | WATER SOFTENER REGENERATION - A new process for ion exchange softening of water used in Once-Through Steam Generators (OTSGs) by recovering and using the salt content of the blowdown water from the OTSG to regenerate the softener resin is provided, thus eliminating the cost for commercial regenerant salt that would otherwise be needed. Further, the very high purity of the salt recovered in the blowdown inherently results in the production of softened water with hardness leakage levels that are an order of magnitude lower than can be attained using commercial salt, thus reducing scale deposit potential and improving operating efficiency and reliability of the OTSG. | 08-05-2010 |
20110062084 | METHOD FOR REMOVING PHOSPHORUS - A method for removing phosphorus includes at least the steps of: 1) placing lanthanum hydroxide (absorbent) into a device for removing phosphorus, and allowing sewage having a phosphorus content of less than 100 mg/L to flow through the device; 2) adding sodium hydroxide (regeneration solution of the absorbent) when the absorption capacity of the device is exhausted, and allowing the regeneration reaction to proceed for between 4 and 12 hours; and 3) collecting eluate from step 2) and recycling phosphorus. The method for removing phosphorus is highly efficient, employs absorbent material having a large absorption capacity and low production cost. The method is simple and convenient to practice, and low in cost. | 03-17-2011 |
20120199536 | WATER FILTRATION SYSTEM - A water filtration system having a tank, a fluid flow interface into the interior of the tank, and a control valve. The control valve is in fluid communication with the fluid flow interface. The control valve includes a source water inlet for receiving a flow of source water, a drain outlet, a treated water outlet and an air inlet, the control valve being operable to control a passage of fluids between the inlets and the outlets and the fluid flow interface. A filtration media is contained within the tank which includes a media mixture of manganese dioxide coated silica core filtration media and iron hydroxide filtration media. The control valve may be programmed to perform a filtering service process, a backwashing process and an air downflow process. | 08-09-2012 |
20120211427 | REGENERATIVE PURIFICATION OF A PRETREATED BIOMASS STREAM - It is disclosed a process for removing at least a portion of the furfural and acetic acid in a first stream comprised of water, at least one compound selected from the group consisting of furfural and acetic acid, C5's and C6's. Such process comprises the steps of contacting the stream with an adsorption media which has been previously contacted with a second stream comprised of the same components and the adsorption media has been regenerated by exposing it to conditions, without being in contact with the second stream, such that at least 70% of the adsorbed furfural and acetic acid have each been desorbed and at least 60% of the C5's and C6's remain adsorbed on the media. | 08-23-2012 |
20130220935 | REMOVAL OF 1,4-DIOXANE FROM WATER USING CARBONACEOUS ADSORBENTS - The present invention relates to the use of a carbonaceous adsorbent for the removal of a recalcitrant compound (1,4-dioxane) from contaminated water. The adsorbent is able to reduce the concentration of 1,4-dioxane from thousands of μg/L to <3 μg/L (the current EPA guideline). In addition, the adsorbent is regenerable in place with low pressure steam. | 08-29-2013 |
20130248452 | METHOD OF TREATING TREATMENT OBJECT CONTAINING HARMFUL COMPOUND - Disclosed is a method of treating a treatment object containing a harmful compound. The method includes: a step A of bringing a treatment object containing a harmful compound containing an element X that is As, Sb or Se into contact with titanium oxide so as to adsorb the harmful compound on the surface of the titanium oxide; a step B of separating, from the treatment object, the titanium oxide on which the harmful compound is adsorbed; and a step C of irradiating the titanium oxide separated from the treatment object with light in a treatment phase containing a radical source so as to cause a reaction between the harmful compound adsorbed on the titanium oxide and a radical generated from the radical source and detoxify the harmful compound. | 09-26-2013 |
20130292337 | POLYMERIC IRON CHELATING AGENT - Disclosed is a water-insoluble polymeric iron chelating agent having a polymer backbone and an aromatic ring attached to the polymer backbone through an —NH—CH | 11-07-2013 |
20140061134 | WATER TREATMENT SYSTEM WITH CARBON REGENERATION CIRCUIT - A water treatment system ( | 03-06-2014 |
20140061135 | Water Detoxification by a Substrate-Bound Catecholamine Adsorbent - A bio-inspired method for detoxifying contaminated water is disclosed. In the method, polydopamine, a mussel-inspired adhesive catecholamine was used as an adsorbent to effectively remove from contaminated water three major classes of toxic agents: heavy metal ions (e.g., Cr, Hg, Pb, Cu, and Cd), toxic organic species (e.g., 4-aminopyridine), and radioisotopes (e.g., Lutetium-177). Furthermore, the polydopamine adsorbent was regenerated by treatment with acid or hydrogen peroxide. | 03-06-2014 |
20140116952 | REDUCED MAINTENANCE WATER TREATMENT APPARATUS INCORPORATING WET AIR REGENERATION - A water treatment system ( | 05-01-2014 |
20140263075 | COMPOSITIONS AND METHODS FOR CLEANING WATER FILTRATION MEDIA - Compositions and methods for removing surface deposits in situ from filtration media contained in water filtration beds may include a solid acid component, a solid oxidizer, low temperature activator, a dessicant, an anti-caking agent, a pH indicator, a corrosion inhibitor, a surfactant, a chelating agent, and/or a defoaming agent. A granular acid component may include sodium bisulfate, and a granular oxidizing component may include at least one of sodium percarbonate, sodium perborate, potassium percarbonate, and potassium perborate. Compositions may be applied to top surface and/or subsurface regions of a filter bed, in wetted or dry form. A kit includes a container with dry composition and instructions or indicia for cleaning water filtration media using the composition. | 09-18-2014 |
20140299550 | WATER TREATMENT SYSTEM - A method and apparatus for treating water including a tank having an inlet and outlet and a water treatment material or resin within the tank. A control valve assembly having multiple, separable levels houses a water usage metering mechanism and a regeneration control mechanism, each having associated turbines. An inlet/bypass valve communicates source water with the tank inlet or directly to a system outlet. When the treatment material is exhausted, it is regenerated by actuating the bypass valve to communicate the source water with the system outlet. The turbine driven regeneration control then sequences the steps of regeneration, including opening a control valve to communicate inlet water to a venturi in order to aspirate brine solution and deliver to the tank outlet. The brine solution passes through the treatment material and is discharged through the tank inlet which is communicated to a system drain. At the conclusion of this step, brine solution is blocked from the venturi and the tank is slow rinsed. Subsequently, the communication of the venturi with the tank inlet is blocked, but water is allowed to flow through the venturi and refill the brine reservoir. Water at the outlet is then communicated to the tank outlet to perform a fast rinse. At the conclusion of this step, the source water is communicated to the tank inlet and the bypass step is terminated. | 10-09-2014 |
20140319060 | METHOD FOR REMOVING AMMONIUM NITROGEN FROM ORGANIC WASTE WATER - The invention relates to a method for removing ammonium nitrogen from organic waste water, which method comprises the steps of applying waste water with a content of ammonium to an organic, synthetic ion exchanger, allowing ammonium to adsorb to the ion exchanger, and regenerating the ion exchanger with regenerant solutions of very high molality. | 10-30-2014 |
20150090663 | SYSTEMS AND METHODS RELATED TO PROPORTIONAL REGENERATION OF WATER TREATMENT SYSTEMS - A method for fluid treatment that provides variable or alternative regeneration cycles within the same fluid treatment device. The duration of all stages of the regeneration cycle can be adjusted depending upon the amount of fluid treated so that regenerant resources such as water are not underutilized and waste is not discharged unnecessarily into the environment. Additionally or alternatively, a regeneration sequence may include a fluid release sequence in which a fluid is released from a water treatment tank by successive linear movement of a piston in a valve assembly. | 04-02-2015 |
20150136706 | METHOD FOR REMOVING CHROMIUM FROM WATER USING WEAK BASE ANION EXCHANGE RESIN AT NEAR-NEUTRAL PH - A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism. | 05-21-2015 |
20150328620 | METHOD OF CAPTURING HEAVY METALS BY A CHEMICALLY FUNCTIONALIZED SURFACE - There is described a method for heavymetal capture, which method comprises the step of bringing the heavy metal into contact with a chemically functionalized surface prepared by a plasma process, the surface being provided with organic functional groups able to coordinate with and thereby capture the heavy metal. | 11-19-2015 |
20150375302 | METAL NANOPARTICLES AND METHODS FOR THEIR PREPARATION AND USE - Methods of synthesizing metal nanoparticles from a metal oxide ore are provided. The methods include adding a metal compound and a reducing agent to the metal oxide ore and contacting the metal compound and the reducing agent to form zero-valent metal nanoparticles. The methods also include contacting the metal oxide ore and hydrogen (H | 12-31-2015 |
20160016823 | NATURAL ZEOLITE-NANOHYDROXYAPATITE COMPOUND MATERIAL, METHOD FOR PREPARING SAME AND USE THEREOF FOR REMOVING FLUORIDE FROM WATER - The present invention relates to a compound material consisting of a natural zeolite having calcium as an exchangeable cation, in which hydroxyapatite on a nanometric scale is grown in a controlled manner on the surface thereof; to the method by which said compound material is obtained; and to the use thereof for removing fluoride from water in order to make same drinkable. As a result of the aforementioned special characteristics of hydroxyapatite crystals, said material has a very high intrinsic capacity (based on the weight of hydroxyapatite) for removing fluoride. This capacity, combined with the low cost and ease of access to the materials used for preparing same, and with the straightforward nature of the method, means that said material is the perfect candidate for removing fluoride from water having high levels of this contaminant. | 01-21-2016 |
20160018778 | METHOD FOR TREATING PRINTING PLATE DEVELOPER LIQUID AND SYSTEM FOR TREATING PRINTING PLATE DEVELOPER LIQUID - Provided is a method for treating a printing plate developer liquid by which a developer waste liquid can be reused by also removing components that are dissolved in the developer waste liquid, and a system for treating a printing plate developer liquid. | 01-21-2016 |
20160115044 | METHOD AND APPARATUS FOR REDUCING REGENERANT AND WASTEWATER BY USING COMPRESSED AIR - An apparatus and method for reducing regenerant and wastewater by compressed air are provided. The method comprises the first service, the first air-intake and drain step, the first assistant drain step, the first rinse and backwash step, the second air-intake and drain step, and the first generation step. The first air-intake and drain step and the first assistant drain step are useful to reduce the total amount of the consumed pure water and total amount of the produced wastewater. By recovering and reusing the spent regenerant, the discarded amount of the spent regenerant is decreased, the concentration of the adsorbed substances in the spent regenerant is increased, thereby reducing the pollution in the environment. | 04-28-2016 |
20160199752 | Fiber Based Molecularly Imprinted Polymers for the Removal of a Significant Fraction of Target Imprintable Entities | 07-14-2016 |