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| Number | Title | Issue Date |
| 8083949 | System and method for selectively removing ions from acidic solutions A system for selectively removing at least one undesirable ion from an acidic solution including a tank receiving the acidic solution, a chiller in fluid communication with the tank, the chiller being configured to reduce a temperature of the acidic solution, and an... | 12/27/2011 |
| 7927494 | Water reuse method in cleaning device There disclosed a water reuse method in which a surfactant is easily removed from surfactant-including for-treatment water in a cleaning device, whereby water can be reused, and an adsorbent can easily be regenerated only by exposing the adsorbent to an electrolytic... | 04/19/2011 |
| 7897052 | Method for removing arsenite and arsenate from water A method for removing arsenite and arsenate from water is provided. The method comprises reacting the water with cupric oxide (CuO) particles for a predetermined time and filtering the reacted water. A system for removing arsenite and arsenate from liquids is also p... | 03/01/2011 |
| 7670492 | Method of removing a metal ion from a water stream using organo-ceramic composite materials The present invention relates to an organo-ceramic composite material useful for the extraction of metal ions from solution. The organo-ceramic composite material is formed according to a sol gel synthesis scheme by reacting a functional precursor silane and its hom... | 03/02/2010 |
| 7655147 | Method of removing ions from a fuel cell system The present invention is directed to a fuel supply and fuel system with an ion filter and an ion gauge. The filter can be made from discrete pieces of polymeric filter material. The polymeric filter material is substantially the same as the proton exchange membrane ... | 02/02/2010 |
| 7572380 | Method for oxyanion removal from ground water A carbonaceous material that has been loaded with at least one ionic organic species or hydroxide species and at least one metal or alkaline earth metal. The ionic organic species or hydroxide species is at least one selected from the group consisting of: fatty acid... | 08/11/2009 |
| 7553422 | Method and device for purifying water of nuclear installations A method of purifying water in a nuclear installation includes an ion exchange mechanism in which the water is purified with an ion exchanger. Before being guided over the ion exchanger, the water is brought into contact with a catalyst in order to decompose hydroge... | 06/30/2009 |
| 7514003 | Methods for producing useful water products with reduced sodium content The invention relates to a process for treating unwanted moderately saline waters for producing waters acceptable for treating soil, such as for irrigation. The treated water is also suitable for human and livestock consumption. The process includes passing moderate... | 04/07/2009 |
| 7462286 | Chelate exchanger The present invention relates to novel ion exchangers comprising carboxyl groups and also —(CH2)mNR1R2 groups having improved exchange kinetics and selectivity, a method for their production and also use thereof for the ... | 12/09/2008 |
| 7381333 | Treatment of water flowing in a horizontal conduit Trace levels of dissolved toxic species are removed from water flowing horizontally in a conduit equipped with overhead debris-excluding structure by suspending from the overhead structure elongated absorbent structures in the form of porous bags which confine parti... | 06/03/2008 |
| 7368059 | Method for preferentially removing monovalent cations from contaminated water A process and apparatus for continuously removing ions from solution in proportion to their prevalence in solution using an ion exchange media. The process comprises: (a) mixing fresh or regenerated ion exchange media and a feed solution containing diverse ions; (b)... | 05/06/2008 |
| 7341668 | Filter aid and method of using same for reclaiming water-based fluids used in metal working processes A filter aid and a method of using the same are disclosed that effectively removes contaminants from water-based metal forming liquids used in aluminum forming, rolling and other metal working processes. The filter aid includes a cellulosic material and a cationic p... | 03/11/2008 |
| 7341670 | Method for treating wastewater A wastewater treatment system treating excess wastewater from a sewer system includes a generally vertically oriented first shaft structure adapted to receive excess wastewater from the sewer system, a generally vertically oriented second shaft structure spaced apar... | 03/11/2008 |
| 7341665 | Process for the treatment of contaminated water based on the use of apolar zeolites having different characteristics A process is described for the treatment of water contaminated by apolar organic compounds and/or by heavy metals, which consists in circulating the water through a system comprising at least two types of zeolites having a silica/alumina ratio >50, placed in success... | 03/11/2008 |
| 7338605 | Filter aid and method of using same for reclaiming water-based fluids used in metal working processes A filter aid and a method of using the same are disclosed that effectively removes contaminants from water-based metal forming liquids used in aluminum forming, rolling and other metal working processes. The filter aid includes a cellulosic material and a cationic p... | 03/04/2008 |
| 7335385 | Method for iron removal from wine and other beverages Phytic acid is added to wine to chelate polyvalent iron cations. A calcium salt is added to co-precipitate the complex that subsequently is removed by filtration. This method effectively, inexpensively and safely removes excessive levels of iron in wine, sparkling w... | 02/26/2008 |
| 7335307 | Method for removing contaminants from water using ruthenium based contaminant sorbents and oxidizers Ruthenium compounds, either alone or in combination with other remediating compounds, can be used to oxidize, remove and sequester contaminants in water and soil or sediments. ... | 02/26/2008 |
| 7332089 | Method of extracting metal ions from an aqueous solution utilizing an antimony silicate sorbent The invention provides a use of a material comprising antimony silicate as a sorbent in the removal of metal ions, e.g. radioactive metal ions, from an acidic liquid medium. The metal ions may be selectively removed from amongst other ions such as Na, K, Mg, and Ca ... | 02/19/2008 |
| 7329354 | Purification of organic solvent fluids A chemical distribution system having improved organic solvent fluid purity and consistency includes a vessel containing ion-exchange media positioned within a fluid flow pathway such that the organic solvent fluid passes through the ion-exchange media, thereby effe... | 02/12/2008 |
| 7326348 | Method for removal and destruction of ammonia from an aqueous medium Methods and apparatuses are provided for the removal and destruction of ammonia from an aqueous medium. The methods and apparatuses include the removal of ammonia from an aqueous medium by contact with either natural or synthetic zeolite. The spent zeolite is regene... | 02/05/2008 |
| 7326346 | High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/05/2008 |
| 7323109 | Composition comprising metal-ion sequestrant This invention relates to a composition of matter comprising a functionalized mordant polymer comprising a cationic polymer having an adsorbed metal-ion sequestrant, wherein the metal-ion sequestrant has a stability constant greater than 1010 with iron (I... | 01/29/2008 |
| 7314569 | Treatment of arsenic-contaminated water using akaganeite adsorption The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems. ... | 01/01/2008 |
| 7314568 | Water conditioning system A multi-stage water conditioning system is structured for conditioning a flow of influent water passing through the conditioning system by removing one or more cations including sodium, iron, barium, and or ammonia from the influent water, while also possibly adding... | 01/01/2008 |
| 7311843 | Bio degradation of oxyanions such as perchlorate on ion exchange resins Systems and methods for removing perchlorate load off of ion exchange resins are disclosed. The systems and methods rely upon direct contact between the resin and a liquid product formed by the culturing of perchlorate-destroying microorganisms. These methods can be... | 12/25/2007 |
| 7311844 | Method of treating stormwater runoff and domestic waste with coal ash A method of treating wastewater, and more particularly stormwater runoff or domestic waste, wherein the wastewater is directed through a high carbon ash particulate. Contaminants such as phosphorus, nitrogen, BOD and COD can be removed. In addition, treatment of the... | 12/25/2007 |
| 7311829 | Water conversion device A water treatment device and method for treating a quantity of water is powered by gravitational flow. The device includes an upper collecting chamber (14) and a filtration chamber (18). The filtration chamber includes a set of reactance containg at le... | 12/25/2007 |
| 7309438 | Mitigation of environmental pollution A process for mitigating the pollution caused by a potential polluting agent comprises binding the potential polluting agent with a product obtained by calcining skeletal material and hydrating the calcined skeletal material. ... | 12/18/2007 |
| 7309683 | Cleaning composition and method of cleaning a semiconductor device using the same A cleaning composition comprises an alkali solution, pure water, and a surfactant represented by the following chemical formula: R1-OSO3—HA+ wherein R1 is one selected from a group consisting of a butyl group, an isobutyl group, an isooctyl g... | 12/18/2007 |
| 7300586 | pH stable activated carbon An activated carbon composition is disclosed, which includes an activated carbon and a carboxylic acid containing compound. The activated carbon composition is prepared by immersing an activated carbon in an aqueous solution of a carboxylic acid containing compound.... | 11/27/2007 |
| 7282153 | Method for removal of arsenic from water A method for removing arsenic from water by contacting water with a strong base anion exchange resin comprising at least one metal ion or metal-containing ion whose arsenate salt has a Ksp no greater than 10−5, provided that the metal is not ... | 10/16/2007 |
| 7270796 | Ammonium/ammonia removal from a stream In one embodiment, an ammonium removal method can comprise: removing a multivalent cation from a stream comprising ammonium to form a treated stream; converting the ammonium in the stream to ammonia by increasing the pH of the stream; and separating the ammonia from... | 09/18/2007 |
| 7267769 | Water purification system utilizing a carbon block pre-filter A water purification system includes an activated carbon filter and a reverse-osmosis (RO) filter. The activated carbon filter is typically formed with a central aperture that receives an upper portion of a central tube. The RO filter, which is positioned downstream... | 09/11/2007 |
| 7268273 | Recovering metals from soil The invention relates to recovering metals, such as nickel and cobalt, by phytomining or phytoextracting soils rich in metals wherein the desired metal is selectively accumulated in hyperaccumulator plants by adjusting the soil pH. The metals are ultimately recovere... | 09/11/2007 |
| 7261285 | Internal inserts in cooling towers The invention concerns inserts in the moist/wet region of cooling towers, which essentially consist of plastic. An additive that prevents or considerably reduces soiling through the formation and buildup on the inserts during subsequent use is added to the plastic. | 08/28/2007 |
| 7258801 | System and method for reducing deionized water consumption A system and method are provided for reducing DI water consumption by delivering the DI water at an elevated processing temperature when demanded. The DI water is passed through a heater for heating the DI water to a processing temperature in a single pass. The DI w... | 08/21/2007 |
| 7244403 | Purification of Lutetium 177 Undesirable metal cation contaminants, including hafnium, can be reduced from a solution containing Lutetium-177 on a bed of an anion exchange resin. The thus purified solution can be stored and transported in a polypropylene vial, to prevent the possibility of hafn... | 07/17/2007 |
| 7235179 | Method for removing arsenic from water The present invention relates to methods for the rejuvenation of cupric oxide having adsorbed arsenic from arsenic contaminated water. The rejuvenated cupric oxide may be recycled to again react with and adsorb arsenic in arsenic contaminated water. ... | 06/26/2007 |
| 7217366 | Purification of ammonium metallate solutions A process for reducing the content of alkali metal impurities (e.g., potassium) in ammonium metallate solutions is described. The process involves subjecting a feed solution containing ammonium metallate and alkali metal impurities to membrane filtration. The membra... | 05/15/2007 |
| 7217755 | Organic/inorganic nanocomposites, methods of making, and uses as a permeable reactive barrier Nanocomposite materials having a composition including an inorganic constituent, a preformed organic polymer constituent, and a metal ion sequestration constituent are disclosed. The nanocomposites are characterized by being single phase, substantially homogeneous m... | 05/15/2007 |
