Water-softening Or Purifying Or Scale-inhibiting Agents Patents (Class 252/175)
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Publication number: 20030022793Abstract: A water treatment agent and method of treating water to inhibit, reduce, or prevent the formation of algae and bacteria in a water body. The water treatment agent may include copper sulfate penta-hydrate and/or silver, di-sodium ethylene di-amine tetra-acetic acid dihydrate, a scale inhibitor, a shocking agent and a buffer agent. For instance, the treatment agent may include a composition of copper sulfate pentahydrate, di-sodium ethylene di-amine tetra-acetic acid, monopotassium phosphate or sulfuric acid, and potassium monopersulfate and 1-hydroxyethylidene-1,1-diphosphoric acid.Type: ApplicationFiled: May 31, 2002Publication date: January 30, 2003Inventors: Terry A. Ring, Tom Smokoff, M. Anthony Gamarra
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Publication number: 20030010458Abstract: Compositions and method for improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the aqueous digester composition in a chemical pulping process during the digestion stage. The compositions and method are especially well suited for use in the Kraft pulping process.Type: ApplicationFiled: June 5, 2002Publication date: January 16, 2003Inventors: Jacob Owen Thompson, Sheldon Phillip Verrett, Steven John Severtson, Jeremy E. Loy
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Patent number: 6503400Abstract: This invention relates to phosphate stabilizing compositions comprising (a) polyaspartic acid, and (b) an anionic carboxylic polymer. The compositions effectively stabilize phosphates by inhibiting the formation of calcium phosphate scale. The invention also relates to a process for inhibiting calcium phosphate scale in water treatment systems.Type: GrantFiled: December 15, 2000Date of Patent: January 7, 2003Assignee: Ashland Inc.Inventors: Pavol Kmec, Dwight E. Emerich
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Publication number: 20020195583Abstract: A process for preventing formation of scale which comprises adding, into a water system in which ozone is used for disinfection, a polymeric scale inhibitor having a high molecular weight which gives an average molecular weight within an optimum range for preventing formation of scale after the polymeric scale inhibitor is decomposed with ozone.Type: ApplicationFiled: October 19, 2001Publication date: December 26, 2002Applicant: KURITA WATER INDUSTRIES LTD.Inventors: Takashi Suzuki, Akihide Hirano, Hermann Kempen, Katsuhiro Ishikawa, Masahiro Shiratani
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Publication number: 20020195404Abstract: Describes a method for dissolving a solid chemical material, such as calcium hypochlorite, with a solvating liquid, e.g., water, in a chemical feeder operating under positive pressure wherein an inert gas, e.g., air, is injected into the solvating liquid, e.g., by use of an injector nozzle, and the resultant mixture of inert gas and solvating liquid is forwarded to the chemical feeder. Sufficient air is charged to the chemical feeder to limit the level of solvating liquid in the feeder and thereby limit the amount of solid chemical material contacted by the solvating liquid.Type: ApplicationFiled: June 26, 2001Publication date: December 26, 2002Inventors: Stanley R. Pickens, Richard H. Ferguson
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Publication number: 20020166992Abstract: Build-up suppressing compositions, comprising:Type: ApplicationFiled: December 14, 2000Publication date: November 14, 2002Inventor: Giuseppe Raspanti
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Patent number: 6478985Abstract: Water purificant methods of the invention are effective to provide optimum media for living cells of microorganisms, fishes, plants, hymenocarps and/or animals in water and/or soils. The methods are applicable to purification of environmental water and water culture, to vegetables, hymenocarps, fishes and shrimps, to soils, to water supply tanks, cooling towers and humidifiers, to water front plants, and to growth and/or protection of prawns as well as for other applications.Type: GrantFiled: June 15, 2001Date of Patent: November 12, 2002Inventor: Eiichi Idaka
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Publication number: 20020162990Abstract: The present invention comprises a one-step method of etching and desmutting aluminum and its alloys. The method comprises exposing articles made of aluminum and its alloys to a liquid etching/desmutting composition. The liquid composition comprises water and an acid source comprising sulfuric acid and nitric acid, a non-fluorine etchant source comprising phosphoric acid, and a stabilized oxidant. A particularly preferred liquid composition suitable for the etching and simultaneous desmutting of aluminum and aluminum alloys, comprises water and diluted sulphuric acid, nitric acid, phosphoric acid, molybdate and/or condensed molybdate ions, a perfluoroalkyl sulfonate, and aluminum sulfate.Type: ApplicationFiled: February 7, 2002Publication date: November 7, 2002Applicant: Henkel CorporationInventors: Philip M. Johnson, Kelly R. Sakorafos, Lawrence R. Carlson
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Patent number: 6471876Abstract: Filtration media having germicidal properties for use in filtering particles and deactivating, removing and/or destroying microorganisms from a feed liquid passing therethrough. The filtration media includes an effective amount of a germicidal chemically grafted and covalently bonded to a surface of the media. The germicidal grafted filter media is prepared by contacting the media with a grafting solution comprising an anionic monomer, a catalyst, a graft initiator and a germicide and subsequently curing tile media at an elevated temperature to chemically graft a polymerized salt of the polymerizable anionic monomer and the cationic germicide onto a surface of the media. Filter media suitable for use in the present invention include ceramic spheroids, hollow glass spheres, polymeric type media and thermoset coated glass spheres.Type: GrantFiled: November 27, 2000Date of Patent: October 29, 2002Assignee: Kinetico IncorporatedInventors: Christopher L. Hansen, Samuel Mason, Mohan L. Sanduja, Carl Horowitz, Felicia Dragnea, Paul Thottathil
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Publication number: 20020153505Abstract: A controlled-release additive composition for use in aqueous systems. The composition comprises a core containing at least one additive component and a polymeric coating encapsulating said core. The controlled released cooling additive composition slowly releases the additive components to aqueous system, thereby delivering an effective concentration level of additive components over an extended period.Type: ApplicationFiled: February 12, 2001Publication date: October 24, 2002Applicant: Dober Chemical CorporationInventors: Thomas J. Blakemore, Yu-Sen Chen
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Patent number: 6461446Abstract: Washing items are washed simultaneously with softening washing water comprising alkali metal ion and at least one of carbonate ion and bicarbonate ion. The washing water before being softened is obtained by electrolyzing an aqueous solution of sodium hydrogencarbonate having a pH of 9.5 or more and an electric conductivity of 150 mS/m or more. The softened washing water has a total hardness of 40 ppm or less.Type: GrantFiled: December 6, 1999Date of Patent: October 8, 2002Assignee: Mix Co., LTDInventors: Fumitake Satoh, Kazuyoshi Arai, Kazuhiro Miyamae, Tomoyuki Yanagihara, Tatsuya Naitoh, Tomoki Seo
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Patent number: 6440327Abstract: Compositions and methods for inhibiting scale are provided. Pursuant to the present invention, a composition for inhibiting scale is provided that includes a carbohydrate polymer having both nitrogen-containing groups and carboxyl groups. The nitrogen-containing groups include amino groups, amido groups and mixtures thereof. The present invention has been found useful for inhibiting scale in industrial waters, such as, pulp bleach plant process waters which contain calcium oxalate and barium sulfate scale.Type: GrantFiled: January 31, 2001Date of Patent: August 27, 2002Assignee: Ondeo Nalco CompanyInventors: Sergey M. Shevchenko, Prasad Y. Duggirala
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Patent number: 6419850Abstract: An apparatus and composition of matter for treating tap or distilled water prior to use in irrigation during surgical and medical operations.Type: GrantFiled: January 10, 1997Date of Patent: July 16, 2002Assignee: Airel-WestInventor: Henri Rouleau
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Patent number: 6419838Abstract: Aqueous industrial, recreational, and/or drilling systems comprise a synergistic combination of an oxidizing agent and an alkylamine. In the synergistic combination, the MBEC of the oxidizing agent preferably is about 25%, more preferably about 50% reduced compared to the MBEC of the oxidizing agent in the absence of the alkylamine. Similarly, the MBEC of the alkylamine in the synergistic combination is about 20%, preferably about 10%, more preferably about 1%, and most preferably about 0.5% of the MBEC of the alkylamine in the absence of the oxidizing agent. Preferred alkylamines are primary fatty alkylamines, most preferably octylamine. Preferred oxidizing agents are HOCl and HOBr. The oxidizing agent preferably is maintained at a concentration sufficient to provide static control over biofilm formation with periodic addition of the alkylamine.Type: GrantFiled: March 13, 2000Date of Patent: July 16, 2002Assignee: Albemarle CorporationInventor: Christopher J. Nalepa
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Patent number: 6419836Abstract: A composition for treatment of water and soils comprises components A. CaCO3, B. at least one compound selected from the group consisting of calcium salts, including CaCl2 and Ca(NO3)2, and inorganic magnesium compounds, C. at least one compound selected from the group consisting of NaHCO3 and KHCO3, wherein the components A and B are present in a molar ratio of from 0.1:1 to 1:1, and wherein the components B and C are present in a molar ratio of from 1:3 to 1:1.Type: GrantFiled: August 30, 1996Date of Patent: July 16, 2002Inventor: Thomas Willuweit
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Patent number: 6379563Abstract: Aqueous industrial, recreational, and drilling systems comprising a biofilm deactivation agent consisting essentially of one or more alkylamines. The biofilm deactivation agent has a “minimum biofilm deactivation concentration” (“MBEC”) of about 200 ppm or less. In a preferred embodiment, the biofilm deactivation agent consists essentially of primary alkylamines having from about 12 to about 14 carbon atoms, and a MBEC of about 50 ppm or less, most preferably about 30 ppm or less. A most preferred embodiment comprises a synergistic combination of specific quaternary ammonium salts with a primary alkylamine having from about 12 to about 14 carbon atoms. The invention also relates to the method of treating an aqueous system with these biofilm deactivation agents, either alone, or in the presence of an oxidizing agent for static control.Type: GrantFiled: January 19, 2000Date of Patent: April 30, 2002Assignee: Albemarle CorporationInventor: Christopher J. Nalepa
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Patent number: 6379561Abstract: The invention is directed to an oxidizing composition of agglutinated particles comprising an alkali metal permanganate, a binder/coating agent of an alkali metal silicate and/or alkali metal aluminate and a filler such as clay, diatomaceous earth, talc, ground silica or zeolites. The invention also is directed to an oxidizing kit which includes a pervious container and the oxidizing composition. The invention also is directed to a method of oxidizing waste materials with the kit in a substantially aqueous moving fluid stream.Type: GrantFiled: June 30, 2000Date of Patent: April 30, 2002Assignee: Carus CorporationInventors: Arno H. Reidies, Shelley Dawn Corban, Larry Rader, Babe L. Wright
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Patent number: 6375919Abstract: A method for the manufacture of a ferric sulfate solution is provided, characterized in that, iron ore containing 30% by weight or more FeOOH as a trivalent iron (Fe3+) is calcined at 200-600° C., and then dissolved in sulfuric acid. A water treatment agent consisting of a basic ferric sulfate solution manufactured by the above mentioned manufacturing method is used as a coagulating agent for water treatment.Type: GrantFiled: June 20, 2000Date of Patent: April 23, 2002Assignee: Taki Chemical Co., Ltd.Inventors: Toshihiko Kakio, Tatsuo Tsukamoto
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Patent number: 6355771Abstract: A modified polyaspartic acid having a defined branched structure in the main chain thereof is provided. An anhydro polyaspartic acid is modified by a novel method of modification using a mercapto amine precursor, mercapto amine, or a salt of mercapto amine, using a mercapto amine precursor, mercapto amine, or a salt of mercapto amine and aspartic acid or a salt of aspartic acid as a modifying agent, and using no reaction solvent.Type: GrantFiled: August 10, 1999Date of Patent: March 12, 2002Assignee: Nippon Shokubai Co., Ltd.Inventor: Yoshihisa Oda
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Patent number: 6350410Abstract: The present invention provides a method and composition for inhibiting biological fouling in an irrigation system. According to the invention, an effective amount of active zinc is added to irrigation water passing through an irrigation system to inhibit biological fouling. In a preferred form of the invention, the active zinc is chelated with 1-hydroxyethane 1,1-diphosphonic acid (HEDPA). In addition to inhibiting the formation of biological fouling in the system, the active zinc provides nourishment to plants irrigated by the irrigation system.Type: GrantFiled: April 13, 1995Date of Patent: February 26, 2002Assignee: CH20 IncorporatedInventors: Carl E. Iverson, Joyce Prindle
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Patent number: 6346201Abstract: The invention provides an ozonated form of the compound tetrasilver tetroxide, a water disinfection method employing the ozonated tetrasilver tetroxide and compositions comprising the ozonated tetrasilver tetroxide. Examples of compositions of the invention include beverages, sterilants and disinfectants. In addition, the invention provides a method for increasing a half-life of ozone in water, where the method includes providing tetrasilver tetroxide in the water along with the ozone.Type: GrantFiled: April 5, 2000Date of Patent: February 12, 2002Assignee: ICF Technologies, Inc.Inventor: I. Cecil Felkner
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Patent number: 6334904Abstract: The invention provides a water-soluble, water-softening builder in the form of a tablet comprising 40-98% by weight of a combination of a) one or more organic, multifunctional polycarboxylic acid(s) or alkali metal salts thereof, and b) a polymer with water-softening properties in an a:b weight ratio of from 80:20 to 50:50, where the polymer with water-softening properties is a partially neutralized polyacrylic acid having a molecular weight of 1500-8000.Type: GrantFiled: December 17, 1999Date of Patent: January 1, 2002Assignee: Reckitt Benckiser N.V.Inventors: Harald Ahnsorge, Paul Robinson
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Publication number: 20010050350Abstract: A semiconductor wafer cleaning formulation, including 1-21% wt. fluoride source, 20-55% wt. organic amine(s), 0.5-40% wt. nitrogenous component, e.g., a nitrogen-containing carboxylic acid or an imine, 23-50% wt. water, and 0-21% wt. metal chelating agent(s). The formulations are useful to remove residue from wafers following a resist plasma ashing step, such as inorganic residue from semiconductor wafers containing delicate copper interconnecting structures.Type: ApplicationFiled: March 27, 2001Publication date: December 13, 2001Applicant: Advanced Technology Materials Inc.Inventors: William A. Wojtczak, Ma. Fatima Seijo, David Bernhard, Long Nguyen
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Publication number: 20010045543Abstract: Water purificant methods of the invention are effective to provide optimum media for living cells of microorganisms, fishes, plants, hymenocarps and/or animals in water and/or soils. The methods are applicable to purification of environmental water and water culture, to vegetables, hymenocarps, fishes and shrimps, to soils, to water supply tanks, cooling towers and humidifiers, to water front plants, and to growth and/or protection of prawns as well as for other applications.Type: ApplicationFiled: June 15, 2001Publication date: November 29, 2001Inventor: Eiichi Idaka
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Patent number: 6310022Abstract: The invention is directed to a chemical cleaning composition containing a hydroxylated wetting agent, a chelating agent, an emulsifier, optionally a crown ether, and optionally a non-aromatic solvent. The cleaning composition is 100% biodegradable, water-based, and able to remove adhered particles having a particle size of less than 35 micrometers. The invention also relates to a process for cleaning a substrate such as a gas turbine engine.Type: GrantFiled: November 30, 2000Date of Patent: October 30, 2001Assignee: BioGenesis Enterprises, Inc.Inventor: Mohsen C. Amiran
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Patent number: 6306308Abstract: A coagulant which is the reaction product of a trivalent metal salt (eg., FeCl3), excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.Type: GrantFiled: April 20, 1999Date of Patent: October 23, 2001Assignee: Nalco Chemical CompanyInventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
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Patent number: 6303038Abstract: A water soluble dialkylhydantoin and a source of bromide ion are added to a body of water needing sanitization. This is followed by contacting the body of water with an oxidizing agent, which creates biocidal species in situ in the body of water.Type: GrantFiled: June 1, 1999Date of Patent: October 16, 2001Assignee: Albemarle CorporationInventors: Michael J. Sanders, Christopher J. Nalepa
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Publication number: 20010025945Abstract: A remediation agent and process produces a treated water that meets discharge standards required by local regulations and generates stabilized waste which does not require further treatment prior to disposal. The composition of the treatment chemical is applicable to the treatment of industrial wastewaters and more specifically those from automobile production, metal finishing, metal processing, oil refineries, textiles, wood treatment, tannery, circuit board manufacturing, and other miscellaneous industrial waste streams from operations such as paints, coatings, adhesives, soap and detergents, chemicals, and food processing.Type: ApplicationFiled: January 26, 2001Publication date: October 4, 2001Inventor: Sultan I. Amer
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Patent number: 6254800Abstract: The object of the invention is to provide a water purificant effecting as optimum media for microorganisms in hydrosphere and pedosphere and increasing the diversity of microorganisms, fishes, plants and animals. The feature of this invention is comprised of 1 ppm−100% of bittern and acids or bases and/or salts.Type: GrantFiled: July 21, 1997Date of Patent: July 3, 2001Inventor: Eiichi Idaka
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Patent number: 6251848Abstract: Bull's-eye tablets in which both the shaped body per se and the lands surrounding the bull's-eye are mechanically stable and even lend themselves to production in modern high-throughput tablet presses and in which the core placed in the larger shaped body is joined to the tablet in a stable manner and does not separate from the tablet matrix during production, packaging, transportation and handling can be obtained if the contour line of the core falls from the edge zone to the lowest point and climbs back to the edge zone.Type: GrantFiled: November 4, 1999Date of Patent: June 26, 2001Assignee: Henkel Kommanditgesellschaft Auf AktienInventors: Thomas Holderbaum, Hans-Josef Beaujean, Christian Nitsch, Juergen Haerer, Markus Semrau, Karl-Martin Faeser
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Patent number: 6232285Abstract: A compacted granulate comprising water-swellable cellulose and/or cellulose derivatives and finely divided polymers/copolymers of (meth)acrylic acid or salts thereof and one or more liquid surfactants, and the use thereof as disintegrating agent for detergent tablets, cleaning agent tablets, water softening tablets and scouring salt tablets, as well as a process for making the compacted granulate by mixing the constituents, granulating and compacting.Type: GrantFiled: November 12, 1999Date of Patent: May 15, 2001Assignee: Stockhausen GmbH & Co. KGInventors: Sascha Casteel, Hans-Georg Hartan, Elke Philippsen-Neu, Rainer Poeschmann
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Patent number: 6221832Abstract: Compacted granulate comprising starch and/or a starch derivatives and, optionally, water-swellable cellulose/cellulose derivatives, and finely divided polymers/copolymers of (meth)acrylic acid or salts thereof and one or more liquid surfactants, and the use thereof as disintegrating agent for detergent tablets, cleaning agent tablets, water-softening tablets and scouring salt-tablets, as well as a process for making the compacted granulate by mixing the constituents, granulating and compacting.Type: GrantFiled: November 12, 1999Date of Patent: April 24, 2001Assignee: Stockhausen GmbH & Co. KGInventors: Sascha Casteel, Hans-Georg Hartan, Elke Philippsen-Neu, Rainer Poeschmann
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Patent number: 6207073Abstract: A method and composition for the remediation of environmental contaminants in soil, sediment, aquifer material, water, or containers in which contaminants were contained, wherein contaminants are reacted with a remediating composition comprising a metal and a sulfur-containing compound to produce environmentally-acceptable, chemically reduced products. The method is useful for treating contaminants such as halogenated hydrocarbons, pesticides, chemical warfare agents and dyes. The remediating composition preferably contains comminuted, commercial grade iron and iron sulfide. The addition of an alcohol to the reactants enhances the rate of the remediation reaction, particularly for contaminants of soils and sediments.Type: GrantFiled: November 8, 1999Date of Patent: March 27, 2001Assignee: The United States of America as represented by the Environmental Protection AgencyInventors: N. Lee Wolfe, Mark G. Cipollone
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Patent number: 6203722Abstract: A stabilized lime slurry for treatment of biological solids in sewage. The composition preferably includes 30-36% calcium hydroxide, 10-16% potassium hydroxide, 2-4% potassium chloride, 2-4% magnesium hydroxide, all on a dry basis, and the balance in water. This composition raises the pH rapidly for destroying pathogens, is sufficiently concentrated for economically feasible transportation, and reduces the cost, difficulties and dangers of treating sewage with a lime based composition while providing a resulting product from the sewage treatment process which can be spread upon agricultural soil in a manner which improves soil fertility without introducing undesirable or contaminating materials into the soil.Type: GrantFiled: October 2, 1998Date of Patent: March 20, 2001Assignee: New Eezy Gro, Inc.Inventor: Louis S. Hurst
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Patent number: 6180023Abstract: A remediation agent and process produces a treated water that meets discharge standards required by local regulations and generates stabilized waste which does not require further treatment prior to disposal. The composition of the treatment chemical is applicable to the treatment of industrial wastewaters and more specifically those from automobile production, metal finishing, metal processing, oil refineries, textiles, wood treatment, tannery, circuit board manufacturing, and other miscellaneous industrial waste streams from operations such as paints, coatings, adhesives, soap and detergents, chemicals, and food processing.Type: GrantFiled: December 12, 1998Date of Patent: January 30, 2001Inventor: Sultan I. Amer
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Patent number: 6180056Abstract: A composition for minimizing biological and/or colloidal fouling is described, which includes an anionic antiscalant and a cationically charged biocide. Further, a method of controlling fouling is described and achieved by introducing a formulation of the present invention into an aqueous system which uses a separation membrane. The compositions used in the present invention are compatible with such separation systems and preferably prevent membrane fouling.Type: GrantFiled: December 10, 1998Date of Patent: January 30, 2001Assignees: Buckman Laboratories International Inc., Betz Dearborn Inc.Inventors: Thomas E. McNeel, Daniel L. Comstock, Maryam Z. Anstead, Richard A. Clark
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Patent number: 6180752Abstract: The invention relates to the production of polyaspartic acid homo- and copolymers by biotechnological processes and to the use of the resulting products (for influencing the crystallization or agglomeration behavior of sparingly soluble salts or solids in aqueous systems).Type: GrantFiled: September 2, 1999Date of Patent: January 30, 2001Assignee: Bayer AGInventors: Winfried Joentgen, Torsten Groth, Alexander Steinb{umlaut over (u)}chel, Tran Hai, Fred Bernd Oppermann
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Patent number: 6165369Abstract: Stable suspensions can be made from acidic metal salt solutions and finely divided acid-insoluble solid particles that have a particle size of less than twenty-five microns, preferably less than ten microns, and most preferably, about one micron. These suspensions can be used to treat surface waters to remove organic materials therefrom. The suspension forms a floc that includes the solid particles and organic materials, which floc rapidly settles out of solution, leaving purified water as the supernatant liquid.Type: GrantFiled: June 16, 1999Date of Patent: December 26, 2000Assignee: General Chemical CorporationInventors: James Nelson Tanis, Jawahar Chunilal Parekh
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Patent number: 6162391Abstract: An agent for preventing scale formation and a method for preventing scale formation include a polymer which has at least 50% of N-vinyl formamide units or N-vinyl acetamide units and a phosphorus compound added to water in a cooling water system, a boiler water system, or the like. The scale preventing agent and scale preventing method of the present invention are effective in preventing the adherence of various types of scales which are generated in cooling water systems, boiler water systems, and the like. In particular, the present invention is effective in preventing the adherence of silica and calcium scale.Type: GrantFiled: May 21, 1998Date of Patent: December 19, 2000Assignee: Kurita Water Industries Ltd.Inventors: Kenji Kowata, Akira Iimura, Shigeru Sato, Urara Usui, Aya Sakaguchi
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Patent number: 6153574Abstract: The speed of disintegration of tablets containing a water-softening agent, especially water-insoluble, water-softening agent intended as detergency builder for fabric washing is enhanced by incorporating spray-dried partially hydrated sodium acetate alone or jointly with sodium citrate dihydrate and/or crystallized sodium acetate trihydrate.Type: GrantFiled: October 7, 1999Date of Patent: November 28, 2000Assignee: Unilever Home & Personal Care USA division of Conopco, Inc.Inventor: Roger Joseph Anna Janssen
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Patent number: 6149821Abstract: A balanced water purification system is provided with a buffer compound, and oxidizer/clarifier compound, and a biocide compound disposed in multiple packets such that the biocide compound and the oxidizer/clarifier compound are contained in different packets. The composition purifies and clarifies water while maintaining the existing water pH. The composition may also include a filtration aid, an algicide, a calcium releasing source, a chelator, and a sequestering agent.Type: GrantFiled: October 23, 1998Date of Patent: November 21, 2000Assignee: Advanced Water Technology, Inc.Inventors: Rhyta Sabina Rounds, Tsui-Ling Hsu
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Patent number: 6149835Abstract: This invention provides a method for maintaining effective concentrations of halogen oxidizing agents and hydrogen peroxide in waters to inhibit growth of bacteria and algae. There is also provided a composition comprising a halogen source, an activated amine, such as sulfamic acid, and hydrogen peroxide for water treatment.Type: GrantFiled: March 16, 1999Date of Patent: November 21, 2000Assignee: Great Lakes Chemical CorporationInventor: Geoffrey A. Brown
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Patent number: 6146465Abstract: An improved process for clarifying sugar syrup in the flotation system of a sugar making operation. Neutral phosphate-based compounds are added to the flotation system to aid in clarifying the sugar syrup. The use of the neutral phosphate-based compounds will eliminate the use of phosphoric acid and the commensurate need for neutralizing chemical as well as elimination of the tanks for phosphoric acid and neutralizing chemical mixing at field installations.Type: GrantFiled: January 13, 1999Date of Patent: November 14, 2000Assignee: Betzdearborn Inc.Inventors: Carlos Roberto Xavier, Claudio Candido Luiz, Luiz Antonio Fernandes
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Patent number: 6136219Abstract: The composition for clarifying a body of water comprises at least an anionic polyacrylamide, aluminum chloral hydrate or aluminum oxide and citric acid combined in amounts sufficient to produce a clarification of a body of water. If necessary, calcium carbonate or calcium sulfate may be included in the composition to neutralize pH in acidic environments for increased effectivity.Type: GrantFiled: July 1, 1999Date of Patent: October 24, 2000Inventor: Stephen W. Decker
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Patent number: 6130258Abstract: A method for resolving an oil-and-water emulsion is disclosed. The method comprises adding to the emulsion (1) if the emulsion does not contain a desirably high concentration of polyvalent metal cations of at least one part per million by weight, an amount of polyvalent metal cations sufficient to result in the desirably polyvalent metal cation concentration in the emulsion, and (2) an effective demulsifying amount of a combination of a terminating agent that is either a non-emulsifying hydrotrope composition or a coupling agent, and a composition comprising a polydithiocarbamate compound comprising at least two groups represented by the formula --(OR.sup.1).sub.X NHC(:S)SR.sup.2, wherein R.sup.1 represents an alkylene group of 1 to 30 carbon atoms, R.sup.2 represents an alkali or alkaline earth metal group or an ammonium group; and x represents an integer of from 1 to about 250 independently selected for each of such groups such that the total of the integers x is, on average, from 3 to about 250.Type: GrantFiled: October 7, 1998Date of Patent: October 10, 2000Assignee: Baker Hughes IncorporatedInventor: Thomas J. Bellos
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Patent number: 6123869Abstract: A scale inhibitor solution composition comprising water; an organophosphorous scale inhibitor selected from the group consisting of nitrilotri(methylene phosphonic acid), diethylenetriaminepenta-(methylene phosphonic acid) and salts thereof with monovalent cations; and sodium chloride in a concentration of between about 12 and about 14% by weight of the scale inhibitor solution.Type: GrantFiled: May 16, 1994Date of Patent: September 26, 2000Assignee: Shell Oil CompanyInventors: Jimmie Brown Lawson, Robert June Faircloth, George Neal Iken
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Patent number: 6120698Abstract: A balanced water purification composition is provided with a buffer compound, and oxidizer/clarifier compound, and a biocide compound. The composition purifies and clarifies water while maintaining the existing water pH. The composition may also include a filtration aid, an algicide, a calcium releasing source, a chelator, and a sequestering agent.Type: GrantFiled: May 15, 1998Date of Patent: September 19, 2000Assignee: Advanced Water Technology, Inc.Inventors: Rhyta Sabina Rounds, Tsui-Ling Hsu
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Patent number: 6093688Abstract: The speed of disintegration of tablets containing a water-softening agent, especially water-insoluble, water-softening agent intended as detergency builder for fabric washing is enhanced by incorporating sodium acetate trihydrate, potassium acetate or a mixture thereof. To inhibit caking and facilitate handling during manufacture, smaller particles of another substance are preferably provided at the surface of the crystals of the acetate or citrate.Type: GrantFiled: March 29, 1999Date of Patent: July 25, 2000Assignee: Unilever Home & Personal Care USAInventor: James William Gordon
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Patent number: 6071434Abstract: The reaction of compounds of the formula:X.sub.2 O.sub.3 P CHY CZ.sub.2where Y and each Z are each H, PO.sub.3 X.sub.2, SO.sub.3 X or CO.sub.2 X (e.g. vinyl phosphonic acid or vinylidene diphosphonic acid) with hypophosphorous acid in the presence of free radicals provides novel compounds X.sub.2 O.sub.3 PCHYCZ.sub.2 PO.sub.2 XH which react with monomers such as vinyl sulphonate, vinyl phosphonate, vinylidene diphosphonate and acrylic acid to form telomers useful for scale inhibition, especially barium scale in oil wells. The polymers show better absorption to rock than PVSA and better thermal stability than random copolymers containing equivalent phosphorus.Type: GrantFiled: February 18, 1998Date of Patent: June 6, 2000Assignee: Albright & Wilson UK LimitedInventors: Keith Philip Davis, Alan Craig Smith, David Robert Edward Walker, Gary Woodward
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Patent number: 6069199Abstract: The object of the invention is to provide a liquid anti-scaler for coating polymerizing reactors obtained by a condensation reaction of naphthol with an aldehydic cross-linking product, wherein the cross-linking product is the reaction product of hydrosulfite and formaldehyde. It contains hydrosulfite and/or radical bisulfites and/or bisulfite. The condensate is made in such a way that in the absence of oxygen, it is in the form of liquid of clear transparent color.Type: GrantFiled: February 13, 1998Date of Patent: May 30, 2000Assignee: C.I.R.S. S.p.A.Inventors: Francesco Carlin, Mario Sattin