Anions Patents (Class 210/683)
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Publication number: 20090272693Abstract: Water contaminated with anions of heavy metals, e.g., arsenic values, is purified by contacting same with a composition containing at least one polysaccharide, such as starches or vegetable gums.Type: ApplicationFiled: April 21, 2006Publication date: November 5, 2009Applicant: RHODIA CHIMEInventors: Caroline Mabille, Vincent Monin, Yves Mottot, Jean-Francois Sassi
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Publication number: 20090274634Abstract: A composition of matter wherein the composition comprises a siliceous substrate having silanols on the surface and a polymer selected from the group consisting essentially of a water soluble polymer, a water soluble copolymer, an alcohol soluble polymer, an alcohol soluble copolymer, and combinations of such polymers, wherein the polymer is chemically bonded to the siliceous substrate by a silane linking material having the general formula O3/2SiQY that is derived from an alkoxy-functional silane having the general formula (RO)3SiQX and processes for preparing the crosslinked polymer that is chemically bonded to the surface of the siliceous substrate.Type: ApplicationFiled: May 5, 2008Publication date: November 5, 2009Inventors: Warde T. Collins, David E. Graham, Douglas H. Adamson, Robert M. Mininni
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Publication number: 20090218290Abstract: Methods of producing macromolecular compositions and using same are provided. The method includes preparing a resin material; forming an acetyl group on the resin material; and oxidizing the acetyl group via a one-step reaction including reacting a sulfoxide and an acid with the acetyl group to form a ketoaldehyde group. The macromolecular compositions are capable of removing an effective amount of one or more constituents from a physiological solution, such as urea during dialysis therapy.Type: ApplicationFiled: May 13, 2009Publication date: September 3, 2009Applicants: Baxter International Inc., Baxter Healthcare S.A.Inventors: Mitchell J. Poss, Henk Blom, Alex Odufu, Robert Smakman
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Patent number: 7572380Abstract: 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 acids, surfactants, organic carboxyl species, organic sulfonate species, organic hydroxyl species, organic phenolic species, organic lactone species, organic amine species, or hydroxide species.Type: GrantFiled: October 25, 2005Date of Patent: August 11, 2009Assignee: The Penn State Research FoundationInventors: Fred S. Cannon, Weifang Chen, Robert Parette, Brian A. Dempsey, Fenglong Sun, Jiying Zou
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Publication number: 20090188869Abstract: Multi-layered macromolecules wherein the layers are covalently bonded together and wherein the macromolecules are covalently bonded to solid particulate substrates, methods for the preparation of such compositions, and methods for their uses in a multitude of end use applications ranging from the purification of waste chemical and metal process streams to the separation and identification of proteins, peptides, and oligionucleotides.Type: ApplicationFiled: May 2, 2008Publication date: July 30, 2009Inventors: Charles E. Skinner, William Henry Campbell, Yung K. Kim
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Patent number: 7556739Abstract: A method of treating a fluid stream underwater comprising integrally attaching a skid to a fluid stream treating vessel so that the fluid stream treating vessel can be disposed on an underwater floor in a position such that an opening in said vessel is at a highest point on said vessel when disposed on the underwater floor; remotely directing a fluid stream treating vessel to an underwater floor location sufficiently close to said fluid stream so that the fluid stream can be remotely attached in fluid communication with said fluid stream treating vessel; remotely connecting said underwater fluid stream to said fluid stream treating vessel for treatment of said fluid stream; treating said fluid stream by contact with a treatment media disposed within said treatment vessel, maintained at equilibrium water pressure at the depth of treatment; and flowing the treated fluid stream out of said treating vessel.Type: GrantFiled: February 7, 2008Date of Patent: July 7, 2009Assignee: Amcol International CorporationInventors: Anna M. Johnston-Dhuet, Giovanni Occhipinti
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Patent number: 7524421Abstract: In some embodiments, a system may reduce metal compounds from water. A system may include alginate particles in a housing. The alginate particles may be formed by directly adding alginate granules to an aqueous solution comprising metal ions, such as calcium ions.Type: GrantFiled: March 3, 2006Date of Patent: April 28, 2009Assignee: Sam Houston State UniversityInventors: Robert Gavin Jones, Rachelle Smith, Gordon Alf Plishker
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Patent number: 7514002Abstract: A method for removing phosphorus is provided in which eutrophic water as a treatment target is supplied to fly ash thereby removing phosphorus contained in the eutrophic water. The fly ash includes about 3% or more calcium oxide as a component. Alternatively, the fly ash consists of a double-structure embedding fine particles in a cavity of a hollow-particle structure having a hole in a part of the surface. Alternatively, the fly ash includes about 3% or more calcium oxide as a component and consisting of a double structure embedding fine particles in a cavity of a hollow-particle structure having a hole in a part of the surface.Type: GrantFiled: November 9, 2007Date of Patent: April 7, 2009Assignee: Hokuriku Electric Power CompanyInventors: Keiichi Betsumori, Takashi Matsubara, Hiroshi Saiki, Isao Karube
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Publication number: 20090084731Abstract: A method of manufacturing a remediation material is disclosed. The method includes providing a biogentic material as a substrate, preparing the surface of the substrate for a chemical reaction, and performing template-driven surface derivitization on the surface of the substrate to provide a net positive charge on the surface of the substrate. The remediation material may be placed into contact with surface water, ground water, soil, or sediment by at least one of a permeable reactive barrier, direct well injection, or direct introduction of the remediation material into soil or sediment, to remove contaminants from the surface water, ground water, soil, or sediment.Type: ApplicationFiled: October 1, 2008Publication date: April 2, 2009Inventors: Jeffrey W. Talley, Steven Larson, Lawrence G. Wolfe, Brian D. Fisher
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Publication number: 20090084730Abstract: Modified and insoluble starches are utilized for eliminating natural organic substances/contaminants from liquids and in particular from liquids used for food applications, such as drinking water, beverages, fruit juices or syrups, as well as natural water, industrial process water, or wastewater.Type: ApplicationFiled: June 28, 2005Publication date: April 2, 2009Applicant: RHODIA UK LIMITEDInventors: Caroline Mabille, Jean-Francois Sassi, Vincent Monin, Yves Mottot
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Patent number: 7510659Abstract: Present invention deals with cost-effective surface-modified zeolite materials developed from commercial zeolites and flyash-based zeolites by treating with surface modifiers like hexadecyltrimethyl ammonium bromide (HDTMA-Br). The formation of zeolitic materials with anionic characteristics requires treatment with a surfactant with initial concentrations greater than its critical micelle concentration (CMC). The sorption of oxyanions on the surfactant-modified zeolite (SMZ) is attributed to surface complexation and surface precipitation. Incorporation of metal ions on SMZ showed improved anion uptake for dearsenification of water due to synergistic effects and is able to meet the stringent target of 10 ppb of As on potable water being adopted by most countries. High selectivity, faster kinetics and high adsorption capacity ensures cost effectiveness of this product as compared to other low-cost products for dearsenification.Type: GrantFiled: August 23, 2006Date of Patent: March 31, 2009Assignee: Council of Scientific & Industrial ResearchInventors: Sadhana Suresh Rayalu, Pawan Kumar, Siddharth Ulhas Meshram, Amit Kumar Bansiwal, Nitin Kumar Labhsetwar, Rishi Narayan Singh, Sukumar Devotta
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Publication number: 20090028770Abstract: The present invention provides a method for advantageously producing an iron oxyhydroxide exhibiting excellent capability of adsorbing harmful substances, such as a phosphrous components and endocrine disrupting chemicals, which are contained in industrial wastewater, exhaust gases, etc., and an adsorbent material comprising the iron oxyhydroxide produced by the method as a main component. Specifically, the present invention provides an adsorbent material produced by a method comprising the steps of: (a) adding a base to an aqueous iron ion-containing solution, adjusting the pH of the resultant mixture to 9 or less, to form a precipitate that contains an iron oxyhydroxide; (b) drying the precipitate at a temperature of 100° C. or lower to obtain an iron oxyhydroxide; (c) contacting the resultant iron oxyhydroxide with water; and (d) subjecting the resultant iron oxyhydroxide to a heat treatment under a gas atmosphere having an inert gas concentration of 80% or greater at a temperature of 100 to 280° C.Type: ApplicationFiled: February 16, 2006Publication date: January 29, 2009Applicants: JAPAN SCIENCE AND TECHNOLOGY AGENCY, SHIGA PREFECTURE INDUSTRIAL SUPPORT CENTER, KYOTO UNIVERSITYInventors: Kazuhiro Mae, Taisuke Maki, Atsushi Yamamoto
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Publication number: 20090020478Abstract: Processes comprising: providing an anion exchanger at least partially loaded with hexachlorostannate; and contacting the at least partially loaded anion exchanger with a 1 to 10 wt. % hydrochloric acid solution to regenerate the anion exchanger.Type: ApplicationFiled: July 16, 2008Publication date: January 22, 2009Applicant: Bayer Material Science AGInventors: Torsten Erwe, Knud Werner, Dirk Weissenberg
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Patent number: 7476311Abstract: Systems and methods are provided for the removal and disposal of arsenic from an aqueous medium. The systems and methods include the removal of arsenic from a source by contact with either a chemically treated natural or synthetic zeolite, for example a ferric-loaded zeolite. The spent zeolite is disposed of at an appropriate arsenic disposal site. A system for monitoring and maintaining an arsenic removal/disposal system by an off-site provider is also disclosed.Type: GrantFiled: September 25, 2002Date of Patent: January 13, 2009Assignee: WRT International LLCInventors: John E. Litz, Charles S. Williams
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Patent number: 7470413Abstract: A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of hydrofluoric acid with an ion exchange resin having an active state operative to exchange selected ions therein for fluoride ions in the solution. The apparatus (200) may include a dual resin setup (222, 223) such that one of the ion-exchange resin can be in the service cycle while the other of the ion-exchange resins undergoes the regeneration and rinse/refill cycles.Type: GrantFiled: January 16, 2004Date of Patent: December 30, 2008Assignee: Edwards Vacuum, Inc.Inventor: Juzer Jangbarwala
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Publication number: 20080290036Abstract: A zirconium-loaded fibrous adsorbent material having phosphoryl groups which is produced by first grafting a reactive monomer having phosphoryl groups onto a polymeric substrate and then loading zirconium. One or more methods of using the zirconium-loaded fibrous adsorbent material to recover arsenic, phosphoric ions, and/or fluoride ions are disclosed.Type: ApplicationFiled: January 2, 2008Publication date: November 27, 2008Applicant: Japan Atomic Energy Research InstituteInventors: Noriaki Seko, Masao Tamada
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Patent number: 7455477Abstract: A new compound represented by a composition formula Fe8O8 (OH)8-2x((SO4)a, (HPO4)b)x (a+b=x, 1?x?1.75, 0<a?1.658, 0.092?b?x) formed by adding a shwertmannite of a composition formula Fe8O8(OH)8-2x(SO4)x (1?x?1.75) to a phosphoric acid solution of a pH value of 2-9 thereby achieving a stabilization by an adsorption of phosphoric acid, shows a very firm stabilization under conditions of 0<a?1.253 and 0.497?b?x. The new compound has a high stability, can maintain a high adsorbing ability for arsenic and the like and a cleaning level for a necessary period or semi-permanently, and can adsorb arsenic and the like in polluted water or polluted soil.Type: GrantFiled: February 3, 2004Date of Patent: November 25, 2008Assignee: Sophia Co., Ltd.Inventors: Hodaka Ikeda, Kenichi Ito, Naoko Akita, Tsutomu Sato, Keisuke Fukushi
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Patent number: 7425270Abstract: The invention relates to chemical industry and can be used for extracting perchlorate-ion from a highly concentrated processing solution having a complex nitrate-chloride-sulphate-iodate composition. The inventive method for extracting perchlorate-ion from an aqueous solution comprises passing the solution through a highly basic anionite and subsequent regeneration of the said anionite in a metal salt aqueous solution. The anionite in the nitrate form is used as an anionite, and its regeneration is performed in an aqueous solution of alkali or alkali-earth metal nitrate at the temperature of 0-60° C.Type: GrantFiled: December 28, 2006Date of Patent: September 16, 2008Inventors: Andrey Veniaminovich Kushul, Igor Mikhaylovich Belozerov, Vitaly Petrovich Isupov, Svyatoslav Vyacheslavovich Polovtsev, Oleg Andreevich Skresanov
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Publication number: 20080221218Abstract: The present invention relates to synthetic receptors, products and methods which are useful in relation to the binding of phosphates for example in water purification and renal dialysis systems.Type: ApplicationFiled: August 15, 2006Publication date: September 11, 2008Applicant: The University of YorkInventors: Hubertus Franciscus Martinus Nelissen, David Kelham Smith
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Patent number: 7419601Abstract: Disclosed herein are articles for removing contaminants from a fluid, such as a liquid or gas, the article comprising carbon nanotubes, which comprise at least one molecule or cluster attached thereto or located therein, wherein the carbon nanotubes are present in the article in an amount sufficient to reduce the concentration of contaminants in fluid that come into contact with the article. A method of making the nanomesh material used in such articles is also disclosed, as are methods of purifying fluids using these articles.Type: GrantFiled: April 22, 2005Date of Patent: September 2, 2008Assignee: Seldon Technologies, LLCInventors: Christopher H. Cooper, Alan G. Cummings, Mikhail Y. Starostin, Charles P. Honsinger
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Patent number: 7413663Abstract: A water treatment apparatus includes a housing comprising multiple housing portions and a plurality of treatment sections disposed within the housing, each treatment section comprising at least one distinct particulate layer. The apparatus is designed so that no water pressure need be applied to force the water through the apparatus, as gravity pulls the water down through the filtering layers. Water may also be force fed through the treatment apparatus; when the water is force fed, the housing portions need not be vertically stacked, but may be configured in any suitable arrangement. The treatment sections are distributed through the various housing portions in logical groups to perform various kinds of filtering. The housing portions are detachable and sealably stackable in multiple configurations, thus passing water through more or fewer treatment layers, depending on the quality of the incoming water.Type: GrantFiled: August 29, 2007Date of Patent: August 19, 2008Assignee: Zero Technologies, Inc.Inventors: Rajan G. Rajan, Mathu G. Rajan
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Publication number: 20080185341Abstract: Described herein are compositions and methods useful for the purification of aqueous fluids using dendritic macromolecules. The process involves using dendritic macromolecules (dendrimers) to bind to or chemically transform solutes, and a filtration step to produce fluid from which solutes have been removed or chemically transformed. Examples of dendrimers that may be used in the process include cation-binding dendrimers, anion-binding dendrimers, organic compound-binding dendrimers, redox-active dendrimers, biological compound-binding dendrimers, catalytic dendrimers, biocidal dendrimers, viral-binding dendrimers, multi-functional dendrimers, and combinations thereof. The process is readily scalable and provides many options for customization.Type: ApplicationFiled: July 31, 2007Publication date: August 7, 2008Applicant: California Institute of TechnologyInventor: Mamadou S. Diallo
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Patent number: 7407587Abstract: Anion exchange materials loaded with oxygen-containing metal compounds within the exchange matrix as a sorbent, and a method for preparation. The materials remove arsenic and other ligands or contaminants from water and other fluid streams.Type: GrantFiled: March 24, 2006Date of Patent: August 5, 2008Assignee: Layne Christensen CompanyInventor: Johanna Teresia Moller
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Patent number: 7404901Abstract: A method for the removal of arsenic ions from water with a porous silica composition with an organofunctional moiety comprising a thio which binds the arsenic ion and is then removed from the water. The method comprises the quality of the water.Type: GrantFiled: May 25, 2006Date of Patent: July 29, 2008Assignee: Board of Trustees of Michigan State UniversityInventors: Thomas J. Pinnavaia, Joel I. Dulebohn, Emily J. McKimmy
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Publication number: 20080169242Abstract: Systems, methods and compositions for the purification, separation and analysis of anionic compounds, including polyanionic compounds are disclosed.Type: ApplicationFiled: November 26, 2007Publication date: July 17, 2008Applicant: WATERS INVESTMENTS LIMITEDInventors: Ziling Lu, Diane Diehl, Jeffrey Mazzeo, Stuart A. Oehrle, Claude R. Mallet, Michael S. Young, Erin Chambers
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Patent number: 7399416Abstract: 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.Type: GrantFiled: December 3, 2003Date of Patent: July 15, 2008Assignee: Idaho Research Foundation, Inc.Inventors: Greg Moller, Kevin Marshall Brackney, Roger Alan Korus, Gerald Michael Keller, Jr., Brian Keith Hart, Remembrance Louisa Newcombe
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Patent number: 7393466Abstract: A metal hydroxide complex has a formula Me(OH)4*A?*nH2O or MeO2*A?*nH2O. Preferred complexes are formed in an alkaline medium, and particularly especially preferred anions include cyanide and cyanide gold complexes. Contemplated complexes are formed on a metal hydroxide (e.g., hydrated zirconium, hafnium, and titanium hydroxide), which may be disposed in a porous container. Consequently, contemplated compounds may be used in methods of reducing the concentration of an anion in an alkaline medium.Type: GrantFiled: June 25, 2002Date of Patent: July 1, 2008Assignee: Applied Intellecutal Capital, Inc.Inventors: Robert Lewis Clarke, Dean Butler
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Publication number: 20080135488Abstract: A process for reducing the fluorosurfactant content of an aqueous fluoropolymer dispersion by filling a container with fluoropolymer dispersion, inserting into the container a fabric pouch containing a fluorosurfactant sorbent so that the sorbent contacts the fluorosurfactant-containing aqueous fluoropolymer dispersion in the container and retains the fluorosurfactant to reduce fluorosurfactant content of said fluorosurfactant-containing aqueous fluoropolymer dispersion, and removing the fabric pouch from the container.Type: ApplicationFiled: February 13, 2008Publication date: June 12, 2008Applicant: E. I. du Pont de Nemours and CompanyInventors: Charles Joseph Noelke, Clay Woodward Jones, Daniel N. Levy, Michael Gene McClusky, David William Johnson
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Publication number: 20080128361Abstract: A method is described for reducing sulfate ions in a first alcohol, including contacting a first alcohol comprising sulfate ions with an anion resin to reduce the concentration of sulfate ions present in the first alcohol and form a treated alcohol.Type: ApplicationFiled: November 30, 2006Publication date: June 5, 2008Applicant: CARGILL, INCORPORATEDInventors: Corey L. Zmolek, Jacqueline M. Fee, James T. Walsh
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Patent number: 7371326Abstract: A treatment system passes feed water containing a contaminant such as perchlorate through a bed of strong base anion exchange resin that has been placed in a form (e.g., in sulfate form) to selectively capture the contaminant while passing other ions (e.g., nitrate) that may also be present in the water. The bed may include a carousel, and the exhausted upstream portion of the resin may efficiently be disposed of by incineration, or may be rotated out for regeneration.Type: GrantFiled: August 12, 2004Date of Patent: May 13, 2008Assignee: Ionics, IncorporatedInventor: Charles A. Dale
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Patent number: 7357871Abstract: A method for a cation-exchange resin wherein a strongly acidic cation-exchange resin is contacted with an aqueous eluting solution and the polystyrenesulfonic acid being eluted from this resin is measured, which comprises setting a plurality of molecular weight ranges in the molecular weight distribution of the polystyrenesulfonic acid eluted, and evaluating the performance capability of the cation-exchange resin based on the correspondence relationship of each molecular weight range with the amount eluted in said each molecular weight range. The evaluation method allows on-target and precise evaluation of the performance capability of a cation-exchange resin being independent of the structure of a base resin and the circumstance under which it is used, which leads to the determination of the optimum time for the exchange of a resin in a water treatment system using a cation-exchange resin, and thus to the extension of exchange of a resin and the reduction of an operation cost for the system.Type: GrantFiled: May 12, 2003Date of Patent: April 15, 2008Assignee: Organo CorporationInventors: Yusuke Nagata, Shinichi Ohashi
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Publication number: 20080078722Abstract: A method for purifying an aqueous alkaline solution, which comprises: bringing a fibrous activated carbon into contact with an aqueous alkaline solution-to remove a metal component other than alkali metals and alkaline earth metals from the aqueous alkaline solution.Type: ApplicationFiled: August 4, 2005Publication date: April 3, 2008Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventor: Keiji Ando
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Patent number: 7338603Abstract: Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or supported on particulate solids having a cation exchange capacity less than 20 milliequivalents per 100 grams or (2) an aqueous solution of one or more soluble rare earth compounds.Type: GrantFiled: July 27, 2005Date of Patent: March 4, 2008Assignee: Molycorp, Inc.Inventors: Edward Bayer McNew, Richard Donald Witham, John Leslie Burba, III
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Publication number: 20080047902Abstract: Water purification media contain an activated carbon having at least one of specific a particle size, surface area, and porosity; and a microcrystalline and/or amorphous titanosilicate at least partially coating the activated carbon. Methods of making the media of microcrystalline and/or amorphous titanosilicate coated activated carbon involve contacting activated carbon with titanosilicate precursors. Methods of purifying water involve contacting water containing both heavy metals and volatile byproducts with the media.Type: ApplicationFiled: August 28, 2006Publication date: February 28, 2008Applicant: BASF CATALYSTS LLCInventors: Colin Beswick, Thomas Shaniuk
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Method for removing contaminants from water using ruthenium based contaminant sorbents and oxidizers
Patent number: 7335307Abstract: 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.Type: GrantFiled: November 3, 2003Date of Patent: February 26, 2008Assignee: U.S. EPAInventors: Kirk G. Scheckel, Christopher A. Impellitteri, James A. Ryan -
Patent number: 7335623Abstract: A zirconium-loaded fibrous adsorbent material having phosphoryl groups which is produced by first grafting a reactive monomer having phosphoryl groups onto a polymeric substrate and then loading zirconium.Type: GrantFiled: December 11, 2003Date of Patent: February 26, 2008Assignee: Japan Atomic Energy AgencyInventors: Noriaki Seko, Masao Tamada
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Patent number: 7326346Abstract: 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 such as a zeolite. The sorbent removes ionic contaminants, such as arsenic, from process streams.Type: GrantFiled: September 1, 2006Date of Patent: February 5, 2008Assignee: ADA Technologies, Inc.Inventors: John Stanley Lovell, Thomas E. Broderick, Craig S. Turchi, Amanda K. Kimball
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Publication number: 20080023404Abstract: There are disclosed a water filter, a method and a system for producing potable water. In an embodiment, the water filter includes a pervious concrete section having an input portion and an output portion. Input portion provides unfiltered water to the section. Output portion receives filtered water from the section and provides the filtered water to a location for collection. In one embodiment, the method includes providing unfiltered water to an input portion of a pervious concrete section of the filter, receiving filtered water from an output portion of the filter, and providing the filtered water to a location for collection. In another embodiment, the system includes a water filter having a pervious concrete section with an input portion and an output portion, a storage portion for providing unfiltered water to the input portion, and a collector portion for receiving filtered water. Other embodiments are also disclosed.Type: ApplicationFiled: July 31, 2007Publication date: January 31, 2008Inventor: Gregory Majersky
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Patent number: 7314570Abstract: The invention relates to a method for the adsorption of heavy metals from media containing heavy metals, using a Lyocell moulded body. The invention also relates to a cellulosic moulded body comprising adsorbed heavy metals and the use of the same as an antibacterial and/or fungicidal moulded body.Type: GrantFiled: November 29, 2001Date of Patent: January 1, 2008Assignee: Zimmer A.G.Inventors: Stefan Zikeli, Thomas Endl
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Patent number: 7311842Abstract: A lignocellulose-based anion-adsorbing medium (LAM) and process for making and using same for selectively removing phosphates and arsenic contaminants from aqueous solutions is disclosed. Making the LAM comprises (a) dissociating cations such as Fe and Al, from their counterions by adding a chemical compound containing said cations to water and acidifying; (b) pelletizing a lignocellulose; (c) adsorbing the cations to the lignocellulose by bringing the lignocellulose into contact with the solution of step (a) and incubating; and, (d) exposing the lignocellulose of step (c) to an alkaline fixing agent to replace hydrogens (H) of the hydroxyl groups of the lignocellulose with the adsorbed cations to produce the LAM with a positive charge. The LAM may be used to selectively and cost-effectively remove phosphate and arsenic contaminants from aqueous solutions by retaining them at the Fe or Al on the LAM.Type: GrantFiled: January 31, 2004Date of Patent: December 25, 2007Assignee: H2O Technologies, LLCInventor: Ju Young Kim
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Patent number: 7311840Abstract: The invention relates to processes and compositions for at least partially removing cations of one or more metals selected from the group consisting of caesium, strontium, lead, silver, transition metals, lanthanides and actinides from a liquid containing the cations. The process comprises contacting the liquid with a sorbent material in an amount and for a time sufficient to at least reduce the concentration of the cations, wherein the sorbent material is a metal oxide composition having the empirical formula Ax/n[ByM1-yO3+?]x.Type: GrantFiled: May 31, 2001Date of Patent: December 25, 2007Assignee: Australian Nuclear Science and Technology OrganisationInventor: Vittorio Luca
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Patent number: 7309436Abstract: Methods and systems for removing perchiorate from water are disclosed which involve the use of a plurality of vessels containing an ion exchange resin having affinity for perchiorate ions, and in which perchiorate-contaminated water is passed over the resin in some but not all of the plurality of vessels operating in parallel to one another thereby removing perchlorate ion from the water stream and generating reduced perchlorate content product water streams and in which a subset of the plurality of vessels is removed from service, their resin is removed and replaced and they are returned to service.Type: GrantFiled: September 1, 2005Date of Patent: December 18, 2007Assignee: Basin Water, Inc.Inventors: Peter L. Jensen, Bryan Zinn, John Zitlau
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Patent number: 7306738Abstract: There is provided a method for deionizing a decomposition produced solution resulting from decomposition of a polyester by ethylene glycol. The ester interchange reaction and hydrolysis reaction along with cation removing treatment of a decomposition product resulting from decomposition of a polyester by ethylene glycol are suppressed. Thereby, a method for deionizing the decomposition produced solution with small reductions in yield and purity can be provided.Type: GrantFiled: December 13, 2002Date of Patent: December 11, 2007Assignee: Aies Co., Ltd.Inventors: Shuji Inada, Kikuchi Sato
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Patent number: 7300589Abstract: Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.Type: GrantFiled: May 16, 2006Date of Patent: November 27, 2007Assignee: Union Oil Company of CaliforniaInventors: Richard Donald Witham, Edward Bayer McNew, John Leslie Burba, III
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Patent number: 7294276Abstract: A process to substantially remove the fluorinated anionic surfactants from fluoropolymer dispersions comprising the following steps: a) addition to the fluoropolymer dispersion of an anionic polyelectrolyte; b) contact of the dispersion with an anionic exchanger; c) separation of the dispersion from the anionic exchanger and recovery of the dispersion substantially fluorinated anionic surfactant free.Type: GrantFiled: December 29, 2005Date of Patent: November 13, 2007Assignee: Solvay Solexis S.p.A.Inventors: Marco Malvasi, Tiziana Poggio, Valeri Kapeliouchko
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Patent number: 7291578Abstract: Polymeric anion exchangers are used as host materials in which hydrated Fe(III) Oxides (HFO) are irreversibly dispersed within the exchanger beads. Since the anion exchangers have positively charged quaternary ammonium functional groups, anionic ligands such as arsenates, chromates, oxalates, phosphates, phthalates can permeate in and out of the gel phase and are not subjected to the Donnan exclusion effect. Consequently, anion exchanger-supported HFO micro particles exhibit significantly greater capacity to remove arsenic and other ligands in comparison with cation exchanger supports. Loading of HFO particles is carried out by preliminary loading of the anion exchange resin with an oxidizing anion such as MnO4? or OCl?, followed by passage of a Ferrous Sulfate solution through the resin.Type: GrantFiled: August 24, 2004Date of Patent: November 6, 2007Inventors: Arup K. SenGupta, Luis H. Cumbal
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Patent number: 7291273Abstract: The present invention relates to compounds and methods for removing metals, e.g., ionic cobalt from an electroless plating operation, preferably to levels less than 5 ppm. The metals can then be either landfilled or regenerated for electrowinning and reuse. The invention utilizes an ion exchange media comprised of a silica backbone and functionalized with phosphonate groups.Type: GrantFiled: December 12, 2005Date of Patent: November 6, 2007Assignee: General Electric CompanyInventors: Stephen R. Vasconcellos, Nicholas R. Blandford
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Patent number: 7282153Abstract: 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 zirconium.Type: GrantFiled: February 15, 2005Date of Patent: October 16, 2007Assignee: Rohm and Haas CompanyInventors: James Henry Barrett, Jose Antonio Trejo
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Publication number: 20070210006Abstract: Present invention deals with cost-effective surface-modified zeolite materials developed from commercial zeolites and flyash-based zeolites by treating with surface modifiers like hexadecyltrimethyl ammonium bromide (HDTMA-Br). The formation of zeolitic materials with anionic characteristics requires treatment with a surfactant with initial concentrations greater than its critical micelle concentration (CMC). The sorption of oxyanions on the surfactant-modified zeolite (SMZ) is attributed to surface complexation and surface precipitation. Incorporation of metal ions on SMZ showed improved anion uptake for dearsenification of water due to synergistic effects and is able to meet the stringent target of 10 ppb of As on potable water being adopted by most countries. High selectivity, faster kinetics and high adsorption capacity ensures cost effectiveness of this product as compared to other low-cost products for dearsenification.Type: ApplicationFiled: August 23, 2006Publication date: September 13, 2007Applicant: Council of Scientific and Industrial ResearchInventors: Sadhana Suresh Rayalu, Pawan Kumar, Siddharth Ulhas Meshram, Amit Kumar Bansiwal, Nitin Kumar Labhsetwar, Rishi Narayan Singh, Sukumar Devotta
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Patent number: 7244359Abstract: A process and medium for decontamination of water containing anionic species including arsenic and chromium, wherein compounds comprising divalent and trivalent metal oxides and sulfides are used to form surface complexes with contaminants under pH conditions within the range of potable water. In one embodiment natural and synthetic spinels and spinel-like materials are used as the sorbent substance.Type: GrantFiled: September 30, 2004Date of Patent: July 17, 2007Assignee: Sandia CorporationInventors: David M. Teter, Patrick V. Brady, James L. Krumhansl