Color Patents (Class 210/917)
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Patent number: 8685253Abstract: A method of removing color bodies from a fermentation broth includes precipitating a color-forming impurity (color body) by adjusting the fermentation broth to a pH greater than about 13; filtering our precipitated color-forming impurities from the broth; and bleaching a second color impurity by treating the broth with an oxidizing agent.Type: GrantFiled: September 24, 2010Date of Patent: April 1, 2014Assignee: BioAmber S.A.S.Inventor: Olan S. Fruchey
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Patent number: 8361329Abstract: An aqueous solution containing an alkali metal compound solute and organic compound contaminants may be treated with ozone to oxidize and/or dissolve the organic contaminants. Treating the aqueous solution with ozone may decrease color contaminants in the alkali metal compound and may also decrease foaming in subsequent crystallization of the alkali metal compound.Type: GrantFiled: February 5, 2010Date of Patent: January 29, 2013Assignee: OCI Wyoming L.P.Inventors: Paul Johler, James Bronstein
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Patent number: 8153011Abstract: The invention relates to a method for separating off coloring components from aqueous plant extracts in which magnesium ions (Mg2+) are added to the plant extract, at least one alkaline component is added to the plant extract, a precipitate is formed, and the precipitate formed is separated off from the plant extract.Type: GrantFiled: April 27, 2007Date of Patent: April 10, 2012Assignee: Bayer Cropscience AGInventors: Friedrich Meuser, Ingo Bauer
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Patent number: 8097165Abstract: 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: GrantFiled: June 28, 2005Date of Patent: January 17, 2012Assignee: Rhodia OperationsInventors: Caroline Mabille, Jean-Francois Sassi, Vincent Monin, Yves Mottot
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Patent number: 7935257Abstract: Use of a fungal biomass for treating industrial wastewaters containing at least one dye and related method, wherein: i. the fungal biomass contains at least the fungal species Rhizomucor pusillus (Lindt) Schipper; ii. the fungal biomass absorbs the at least one dye, so as to obtain wastewater that is basically free of the at least one dye.Type: GrantFiled: November 8, 2007Date of Patent: May 3, 2011Assignees: Marcopolo Engineering SpA, Universita Degli Studi di TorinoInventors: Valeria Paola Prigione, Giovanna Cristina Varese, Leonardo Casieri, Samuele Voyron, Antonio Bertolotto, Valeria Filipello Marchisio
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Patent number: 7790031Abstract: Use of a fungal biomass for treating industrial wastewaters containing at least one dye, wherein: i. the fungal biomass contains at least the fungal species Cunninghamella elegans Lendner; ii. the fungal biomass absorbs the at least one dye, so as to obtain wastewater that is basically free of the at least one dye.Type: GrantFiled: November 8, 2007Date of Patent: September 7, 2010Assignees: Marcopolo Engineering SPA, Universita Degli Studi di TorinoInventors: Valeria Paola Prigione, Giovanna Cristina Varese, Leonardo Casieri, Samuele Voyron, Antonio Bertolotto, Valeria Filipello Marchisio
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Patent number: 7767092Abstract: A method of decolorizing a colored effluent comprising (i) a colored substance; and (ii) a polyvalent carboxylic acid or a polyvalent aminocarboxylic acid, the method including the steps of: (a) controlling a hydrogen ion exponent (pH) of the colored effluent to be in a range in which two or more carboxylic acid groups in the polyvalent carboxylic acid or the polyvalent aminocarboxylic acid does not dissociate; (b) adding an inorganic metal salt to the colored effluent so as to allow the inorganic metal salt to react with the colored substance to form a precipitation in the colored effluent, and (c) eliminating the precipitation from the colored effluent.Type: GrantFiled: October 4, 2007Date of Patent: August 3, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Eiichi Yoshida, Masahiko Nakamura, Kaori Soeda
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Patent number: 7727398Abstract: Colored wastewater from industries, agriculture and the like is discolored by adjusting pH of the wastewater and filtering the wastewater through a mixture of acid-treated sawdust produced from sawdust which has been disposed of after being used for fungi production and charcoal thereby to remove a color component fraction from the wastewater and through a filter material, for example acid-treated rice husk charcoal, in which autochthonous microorganisms are embedded thereby to absorb color components remaining in the wastewater.Type: GrantFiled: August 1, 2008Date of Patent: June 1, 2010Inventor: Seisuke Tanabe
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Patent number: 7658849Abstract: Use of a fungal biomass for treating industrial wastewaters containing at least one dye, wherein: i. the fungal biomass contains at least the fungal species Rhizopus stolonifer (Ehrenberg) Vuillemin; ii. the fungal biomass absorbs the at least one dye, so as to obtain wastewater that is basically free of the at least one dye.Type: GrantFiled: November 8, 2007Date of Patent: February 9, 2010Assignees: Pan-Eco S.A., Universita Degli Studi di TorinoInventors: Valeria Paola Prigione, Giovanna Cristina Varese, Leonardo Casieri, Samuele Voyron, Antonio Bertolotto, Valeria Filipello Marchisio
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Patent number: 7597808Abstract: A wastewater treatment apparatus comprises a nitrogen-containing dye containing wastewater inlet connected to an obligatory anaerobic tank to bring wastewater containing a nitrogen-containing dye into contact with sulfate-reducing bacteria under obligatory anaerobic conditions, a nitrification tank to bring the wastewater into contact with nitrifying bacteria under aerobic conditions, and a denitrification tank to bring the wastewater into contact with the denitrifying bacteria under anaerobic conditions.Type: GrantFiled: July 12, 2006Date of Patent: October 6, 2009Assignee: Kuraray Co., Ltd.Inventors: Tadao Shiotani, Yuko Takami, Seiichi Nakahara
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Patent number: 7468137Abstract: A wastewater treatment process for treating wastewater comprising a water-based dispersion containing a surfactant, a colorant and silica, as well as other solid matter, wherein the wastewater is treated using a polysilicato-iron coagulant.Type: GrantFiled: November 7, 2005Date of Patent: December 23, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Hitoshi Kojima, Shinichiro Kawashima, Kazuya Mori, Atsushi Yamahashi, Yuji Masuda
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Patent number: 7422692Abstract: Presently no chemicals are added in the pulp/paper mills wastewater treatment. There is a loop hole with the Biological Oxygen Demand test utilized. Regulators depend on the Biological Oxygen Demand test. All mills are discharging raw untreated wastes high in Chemical Oxygen Demand, (COD), Total Organic Carbon, (TOC) and COLOR. Liquid Alum solution is added to raw influent. All electrical energy aerated systems are eliminated. All flows from sewers join prior to the entrance to clarifier. The continuous in-line pH controller is proprietary as well as the continuous in-line COD analyzer. Because mills wastewater is amphoteric, it is mandatory that the raw influent pH be adjusted to range of 5.7 to 6.0 for optimum removal efficiencies. Aluminum chloride, ferric chloride and ferrous sulfate may be replaced for alum with higher operating costs. The precipitate is thickened, dewatered and incinerated, and approximately 75% of the chemicals regenerated.Type: GrantFiled: October 30, 2000Date of Patent: September 9, 2008Inventor: Launeil Neil Sanders
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Patent number: 7374687Abstract: A decolorization treatment method in which not only can a liquid that has been obtained by treating raw water that is stock-raising treatment water in a purifier tank be decolorized swiftly with simple equipment, but moreover the treatment water can be purified to an extent that reuse as a washing liquid or the like is possible. The method of decolorizing stock-raising treatment water comprises adding ferric polysulfate and a nonionic or anionic organic coagulant to a filtrate that has been obtained by treating raw water that is stock-raising treatment water in a purifier tank, and agitating the obtained product to bring about reaction and thus separate into solid and liquid components, and removing the solid component. Preferably, a two-stage reaction is carried out in which the ferric polysulfate is added and agitation is carried out to bring about reaction, and then the nonionic or anionic organic coagulant is added thereafter.Type: GrantFiled: July 12, 2005Date of Patent: May 20, 2008Assignee: IK Shoji Co., Ltd.Inventor: Isamu Kobayashi
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Patent number: 7332095Abstract: An oxidation process is described which involves subjecting a feedstock which contains oxidizable material to temperature, pressure and contact with an oxidant. Excess water and volatile oxidation products, such as carbon dioxide, formic acid and acetic acid, are removed in the vapor phase. A catalyst may be employed to increase the rate of reaction. Preferred catalysts include the transition metal ions. Advantageously, the process may be operated in a continuous manner wherein the feedstock is continuously introduced into a reactor and a vapor phase containing volatile oxidation products continuously removed. The process is particularly applicable to the treatment of consumer and industrial waste.Type: GrantFiled: June 24, 2003Date of Patent: February 19, 2008Assignee: Victoria Link LimitedInventors: James Howard Johnston, Peter Thomas Northcote, Michael James Richardson
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Patent number: 7270753Abstract: The present invention relates to a polymer gel having a surfactant-like micelle structure obtained by polymerization or condensation polymerization of an ionic surfactant and an organic or inorganic compound having polymerizable moiety, which is capable of adsorbing and separating specific compounds in an easy recyclable manner.Type: GrantFiled: March 4, 2003Date of Patent: September 18, 2007Inventor: Hongdoo Kim
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Patent number: 7201847Abstract: A method of treating wastewater sources such as sewer systems or those from pulp and paper mills which contain biomass waste involves adding white rot fungi in the presence of glucose. While glucose may be directly added to the wastewater source, it has been found to be more economical to reduce or substantially remove color from the wastewater by additionally adding brown rot fungi in the presence of cellulose and hemi-cellulose. The addition of bacteria has also been found helpful to improve the reduction in color, biological oxygen demand, as well as chemical oxygen demand in wastewater sludge reduction.Type: GrantFiled: January 5, 2005Date of Patent: April 10, 2007Inventors: Michael Bowling, Phil Adams
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Patent number: 7179389Abstract: The use of a composition effective in treatments for a waste treatment or sewage system is provided. The process of preparing such composition includes contacting hydrogen peroxide, glycolic acid, and water. The process can additionally include contacting with one or more additional components such as isopropyl alcohol.Type: GrantFiled: February 11, 2005Date of Patent: February 20, 2007Inventor: James E. McClung
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Patent number: 6896806Abstract: The present invention relates to a bacterium strain of accession no. MTCC 5099, a process for the preparation of innoculum of the said strain, and a process for the reduction of color from pulp mill effluent using the above said innoculum, which comprises steps of inoculating appropriate aliquots of the pulp and paper mill effluent with the cell slurry obtained, incubating the mixture at about 37° C.Type: GrantFiled: March 21, 2003Date of Patent: May 24, 2005Assignee: Council of Scientific & Industrial ResearchInventors: Rita Kumar, Anil Kumar, Deepa Kachroo Tiku
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Patent number: 6833076Abstract: A method for the treatment of waste water by the generation of radicals in the waste water comprises applying to the waste water at least one substance which is capable of providing radicals in the waste water. The substance decomposes by a unimolecular mechanism or by hydrogen abstraction to form a carbon-containing radical on exposure to light or heat.Type: GrantFiled: August 29, 2002Date of Patent: December 21, 2004Assignee: Unilever Home & Personal Care USA, a division of Conopco, Inc.Inventors: Stephen Norman Batchelor, Denise Angela Carr, Robert John Crawford, Lynette Fairclough
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Patent number: 6805802Abstract: Process muds are de-watered by the addition of high clay alumina. The clay is mixed with plant sludges or muds so as to cause flocculation of the solid particles, and separating the water from the solid materials, as by filtration. Various polymers and/or alum process residues can be added as well. In addition to de-watering plant sludges, this method also reduces color, and reduces the total organic carbon as well as heavy metals, from the filtered water. This permits disposal of the water to public waterways with no additional treatment.Type: GrantFiled: July 25, 2002Date of Patent: October 19, 2004Assignee: General Chemical CorporationInventors: Christopher Bruce Lind, Raymond T. Pettyjohn
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Publication number: 20040031751Abstract: The present invention is a method of recycling animal waste into a useable soil nutrient. The method involves separating the solid and liquid fraction of an animal waste slurry and separately treating both fractions with effective amounts of activated naturally occurring soil bacteria. The method also involves adding an odor eliminating microorganism to the animal waste to reduce or eliminate the foul odor of the waste material.Type: ApplicationFiled: April 11, 2003Publication date: February 19, 2004Inventor: Robert D. Jackson
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Patent number: 6627086Abstract: Aqueous suspensions of paints in waste waters can be treated to detackify the paint and facilitate its removal by contacting the paint suspension at a pH of from about 5 to about 14 with a polyarylamine that is produced by reacting an aldehyde with an arylamine in the presence of an acid in an aqueous suspension. The same polyarylamine can also be used for reducing the color content of highly colored liquids. Compositions containing the polyarylamine are also described.Type: GrantFiled: March 21, 2001Date of Patent: September 30, 2003Assignee: Polymer Ventures, Inc.Inventors: Robert P. Mahoney, Christopher B. Murphy, Michael Dugan
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Patent number: 6623648Abstract: Disclosed are an oxidation catalyst suitable for use in treatment of nonbiodegradable wastewater, a method for preparing the same, a method for recycling the same and a method for treating wastewater using the same. The oxidation catalyst comprises an activated carbon support having surface reformed with a tin compound, in the form of particles, powders and pellets, and metal ions impregnated to surface of the support. The preparation method of the oxidation catalyst comprises reforming surface of an activated carbon support in the form of particles, powders and pellets, impregnating various metal ions to surface of the support, drying the metal-impregnated support, and sintering the metal-impregnated support. In addition, the recycling method of the oxidation catalyst comprises drying the oxidation catalyst used for treatment of nonbiodegradable wastewater, and warming-up at 50-100° C. in a double boiler or sintering at 150-500° C. in a furnace the dried oxidation catalyst.Type: GrantFiled: November 1, 2001Date of Patent: September 23, 2003Assignee: ZEO-Tech. Co., LTDInventor: Geun-Seok Lee
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Patent number: 6589427Abstract: This invention relates to a process for treating an effluent comprising a mixture of spent wash and black liquor, said process comprising mixing the effluent with a flocculating agent consisting of a mixture of salts of Group III and transition metals, mixture of natural earth's along with an oxide of alkaline earth metal followed by treating with a combination of ion exchange resins.Type: GrantFiled: February 28, 2001Date of Patent: July 8, 2003Assignee: Council of Scientific & Industrial ResearchInventors: Pramod Prabhakar Moghe, Vinita Vinay Panchanadikar, Ashwini Vinayak Pol, Ajit Ramesh Joshi, Prakash Kondiba Bahirat, Priyadarshini Kudlu, Shekhar Prakash Bahirat
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Patent number: 6511611Abstract: Compositions of aluminum chlorohydrate and high molecular weight branched epichlorohydrin amine condensate polymers are applied to waste liquids, such as pulp and paper mill effluents having a lignin content, to reduce true color, The branched epichlorohydrin amine condensate polymer is branched using branching agents which result in a molecular weight greater than about 300,000 and permit solubility. When applied to waste liquids, the high molecular weight branched epichlorohydrin amine condensate polymer and aluminum chlorohydrate react with the lignin components in the waste liquid to form an insoluble agglomerate thus reducing the true color of the waste liquid. The resulting agglomerate, including the colored lignin, may be filtered from the waste liquid.Type: GrantFiled: March 11, 2002Date of Patent: January 28, 2003Assignee: Steen Research, LLCInventors: Stephen R. Temple, Michael J. Stoltz
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Publication number: 20030006197Abstract: Aqueous suspensions of paints in waste waters can be treated to detackify the paint and facilitate its removal by contacting the paint suspension at a pH of from about 5 to about 14 with a polyarylamine that is produced by reacting an aldehyde with an arylamine in the presence of an acid in an aqueous suspension. The same polyarylamine can also be used for reducing the color content of highly colored liquids. Compositions containing the polyarylamine are also described.Type: ApplicationFiled: March 21, 2001Publication date: January 9, 2003Inventors: Robert P. Mahoney, Christopher B. Murphy, Michael Dugan
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Patent number: 6491827Abstract: Compositions of aluminum chlorohydrate and high molecular weight branched epichlorohydrin amine condensate polymers are applied to waste liquids, such as pulp and paper mill effluents having a lignin content, to reduce true color. The branched epichlorohydrin amine condensate polymer is branched using branching agents which result in a molecular weight greater than about 300,000 and permit solubility. When applied to waste liquids, the high molecular weight branched epichlorohydrin amine condensate polymer and aluminum chlorohydrate react with the lignin components in the waste liquid to form an insoluble agglomerate thus reducing the true color of the waste liquid. The resulting agglomerate, including the colored lignin, may be filtered from the waste liquid.Type: GrantFiled: November 17, 2000Date of Patent: December 10, 2002Assignee: Steen Research, LLCInventors: Stephen R. Temple, Michael J. Stoltz
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Patent number: 6432315Abstract: A process for removal of dissolved components of a liquid solution containing multiple components is provided. The process relates to the addition of granular cationic starch to the liquid solution, heating the resultant mixture to gelatinize the starch and form a starch/component(s) complex, and separating the complex from the liquid. Alternatively, the starch may be pre-gelatinized and added to the liquid solution.Type: GrantFiled: October 10, 2000Date of Patent: August 13, 2002Assignee: Archer-Daniels-Midland CompanyInventor: James J. Foster
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Patent number: 6322701Abstract: A process for the treatment of waste waters containing chemically reducible dissolved organic and inorganic pollutants and suspended mater in particulate or colloidal form. The process comprises of contacting the water with metallic iron or ferrous ions (Fe2+), or mixtures thereof, in the presence of promoter metals, such as Cu, Pd, Pt, Au, Ag, and Ni, or oxides, sulfides and other insoluble compounds of these meals, which catalyze the redox reductions carried out by the iron or ferrous reagents. The production of ferric ions (Fe3+) as a final iron oxidation product allows for the simultaneous coagulation and precipitation of suspended colloidal and particulate solids out of the aqueous phase. In addition to the main reductive reaction scheme, the system performs a multitude of secondary reactions involving the ferrous and ferric ions produced in-situ which allows for the simultaneous removal of specific target pollutants, such as phosphate and hydrogen sulfide.Type: GrantFiled: June 16, 1999Date of Patent: November 27, 2001Assignee: Thocar Ltd.Inventor: Andreas Th Delighiannis
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Patent number: 6319412Abstract: This invention relates to wastewater treatment, process and preferred systems for practice of the process for the removal of organic and inorganic ingredients contaminating wastewater, thereby to allow the reuse or sewer discharge of water used in various manufacturing and other processes. The process of the invention typically involves initial filtration of the wastewater and contact with a paste mixture consisting of magnesium hydroxide, aluminum hydroxide, calcium carbonate, magnesium orthophosphate, ferric sulfate, sodium hydrocarbonate, and activated carbon, the activated carbon removing organics such as dyes and the like while the paste mixture precipitates inorganics for subsequent mechanical removal. After treatment with the paste mixture, precipitating compounds are added to precipitate other inorganics. Flocculating agents are then added for further clarification purposes. Material removal then occurs by mechanical extraction including filtration, settling and the like.Type: GrantFiled: June 28, 2000Date of Patent: November 20, 2001Assignee: New Working Waters, LLCInventor: Crispen Reyna
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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: 6299770Abstract: A water disinfection device is provided having a base fora stabilized support. The base forms a support collar having an annular retaining ring held by a retaining arm, and which holds a durable container of a volume not to exceed 2 liters. A disinfection module provides an ultraviolet disinfection source such that the distance between the surface of the disinfection module and the interior of the durable container is less than 7.5 centimeters at any point except the opening.Type: GrantFiled: July 24, 2000Date of Patent: October 9, 2001Inventors: Ray R. Diener, Thomas R. Hecht
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Patent number: 6261460Abstract: A method for removing a contaminant from water includes mixing droplets of a substantially non-water soluble oil with water to combine with the contaminant. The oil can include polar or ionic functional groups. A chemical destabilizer is added to the water to coagulate and aggregate the oil-contaminant mixture. The mixture is then separated from the water by gravity settling, filtration, or dissolved air flotation, thereby removing the contaminant.Type: GrantFiled: March 23, 1999Date of Patent: July 17, 2001Inventors: James A. Benn, Kenneth C. Thode
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Patent number: 6258279Abstract: This invention is directed to a method of removing color bodies from paper mill waste water comprising adding to the water an effective color-removing amount of a hydrophilic cationic dispersion polymer prepared by polymerizing i. a cationic diallyl-N,N-disubstituted ammonium monomer of formula (H2C═CHCH2)2N+R1R2X− wherein R1 and R2 are independently C1-C20 alkyl, aryl, alkylaryl or arylalkyl and X is an anionic counterion and ii. an acrylamide monomer of formula wherein R3 and R4 are independently hydrogen, C1-C10 alkyl, aryl or arylalkyl; R5 is hydrogen or methyl and R6 and R7 are independently hydrogen or C1-C10 alkyl, in an aqueous solution of a polyvalent anionic salt wherein the polymerization is carried out in the presence of a dispersant.Type: GrantFiled: August 23, 1999Date of Patent: July 10, 2001Assignee: Nalco Chemical CompanyInventors: Jitendra Shah, Richard E. Metzgar
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Patent number: 6241896Abstract: A method and apparatus for treating water by the addition of coagulants comprising the steps of measuring the two parameters of the color and turbidity of the untreated water, determining the control parameter on the basis of the measurement results obtained and determining a control action based upon the determined control parameter and subsequently implementing the selected control action.Type: GrantFiled: March 5, 1999Date of Patent: June 5, 2001Assignee: Associated Water Industries, L.L.C.Inventor: Aubrey A. La Fargue, Jr.
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Patent number: 6159381Abstract: According to the present invention there is provided a method of treating reject from a plant for de-inking waste paper which reject comprises in an aqueous medium a mixture of suspended solids comprising at least ink particles, inorganic particles and fibers, which method includes the steps of (i) chemically treating an aqueous suspension comprising said reject by adding to the aqueous suspension a source of alkaline earth metal ions and a source of carbonate ions to react with the alkaline earth metal ions to form therein a composite particulate material comprising a substantially white insoluble alkaline earth metal carbonate compound precipitated by the said reaction which compound bonds to and entrains material comprising ink particles, inorganic particles and fibers contained in said reject, whereby the darkness of the reject is reduced by formation of the precipitate of the carbonate compound; and (ii) recovering the composite particulate material and delivering the composite particulate material for rType: GrantFiled: January 27, 1998Date of Patent: December 12, 2000Inventors: Ian Stuart Bleakley, Hannu Olavi Ensio Toivonen
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Patent number: 6129849Abstract: In treatment of water by injection of ozone into the water for removal of harmful matters, odor matters, and color matters therein, either or both of a nonyl phenol and a cresol are added to the water to be treated. The nonyl phenol is added together with a lower alcohol or acetone to the water to be treated. The cresol is added together with a lower alcohol or acetone to the water to be treated. A p-nonyl phenol is added as the nonyl phenol for treatment. As the cresol for addition, a p-cresol is added. As the nonyl phenol for addition, a nonyl phenol is used such that two molecular weights of 220 and 107 are detected when measured by either or both of gas chromatography and mass spectrometry. By the above treatment, the decomposition reaction of ozone can be accelerated, and thereby it becomes possible to accelerate the oxidative decomposition reaction of organic matters, the amount of ozone required for the decomposition of harmful matters can be reduced with the decomposition time.Type: GrantFiled: November 19, 1998Date of Patent: October 10, 2000Assignees: Kansai Electric Power Co., Inc., Kansai Environmental Engineering Center Co., Ltd.Inventors: Motonobu Yoshikawa, Akira Murai, Ikuo Kouno, Kazuhiro Miura
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Patent number: 6083398Abstract: Process for the decoloration and the toxification of highly polluted (COD.gtoreq.1000 mg/l) resistant aqueous effluents by an oxidation treatment of the effluents by hydrogen peroxide, continuously and in a homogeneous phase, at a pH of 2 to 5 in the presence of Fe ions and under irradiation by means of UV radiation. The AvOx/COD ratio by weight is not less than 0.5:1 and the AvOx/concentration of Fe ions ratio by weight is not less than 50:1.Type: GrantFiled: November 26, 1997Date of Patent: July 4, 2000Assignee: Solvay (Societe Anonyme)Inventors: Michael Pittroff, Karl-Heinz Gregor, Ludwich Bettens
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Patent number: 6059978Abstract: Cationic polymers are added to wastewater containing colorants to form a cationic polymer/colorant complex. Anionic polymers are then added to the wastewater to produce a flocculent precipitate that is separated from the wastewater.Type: GrantFiled: May 6, 1998Date of Patent: May 9, 2000Assignee: Simco Holding CorporationInventors: Joseph A. Pacifici, Daniel G. Sims
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Patent number: 6019904Abstract: The invention comprises a method for clarifying ink-laden water obtained from the recycling of paper stocks by treating said water with a hydrophilic dispersion polymer. The hydrophilic dispersion polymer of the invention is a copolymer of a diallyl N,N-disubstituted ammonium halide cationic monomer and (meth)acrylamide (AcAm). Following dosing with the polymer, a floc is formed. The floc contains ink and impurities which are removed from the water process stream by means of solid liquid separation; the solid liquid separation comprising a dissolved air flotation method. A preferred copolymer is formed from DADMAC and AcAm.Type: GrantFiled: December 5, 1997Date of Patent: February 1, 2000Assignee: Nalco Chemical CompanyInventors: Jane B. Wong Shing, Karen R. Tubergen
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Patent number: 5961838Abstract: Processes for removing color from a paper mill waste effluent and for removing color from a textile plant waste effluent utilizing an amphoteric copolymer/polyamine combination are described. A preferred amphoteric copolymer is poly(dimethylaminoethylacrylate methyl chloride quaternary salt/acrylic acid) and a preferred polyamine is a polymeric reaction product of epichlorohydrin and dimethylamine.Type: GrantFiled: December 18, 1997Date of Patent: October 5, 1999Assignee: Nalco Chemical CompanyInventors: Michael L. Braden, Richard E. Metzgar, Jitendra T. Shah
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Patent number: 5932106Abstract: Process for regeneration of ion-exchange resins, used in sugar decolorization, using a sucrose solution with sodium or calcium chloride, or another chloride, namely potassium or a mixture of those chlorides, alkalinised with calcium hydroxide. The regeneration of the resin is made with a flow between 1 to 3 cubic meters of a regenerating solution by a cubic meter of resin/hour and a temperature between 40.degree. to 70.degree. centigrade. The sucrose solution used in this resin regeneration process contains between 30 to 600 g of sucrose per liter of solution; calcium hydroxide between 1 to 40 g of CaO per liter of solution; and calcium or sodium chloride, or another chloride, namely the one of potassium, or a mixture of these compounds, in such a quantity that chloride ion concentration is between 3 to 30 g per liter of solution. This regenerating solution is passed through the resin in a quantity between 2 to 4 cubic meters per cubic meter of resin.Type: GrantFiled: September 18, 1996Date of Patent: August 3, 1999Assignee: RAR--Refinarias de A.cedilla.ucar Reunidas, S.A.Inventor: Louis Rocha San Miguel Bento
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Patent number: 5846430Abstract: Effluents containing residual dyes are contacted with an effective amount of hydrotalcite-like material together with an effective amount of a magnesium salt or a mixture of magnesium salts, the weight ratio (on dry basis) of hydrotalcite-like material to magnesium salt being in the range of 20:1 to 1:20. Residual dyes are removed from effluents.Type: GrantFiled: August 19, 1996Date of Patent: December 8, 1998Assignee: Crosfield LimitedInventors: Keith Robert Cockett, Maurice Webb, Roderick Terence Whalley
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Patent number: 5779909Abstract: Disclosed herein is a method for recovering binder resin from the ink layer of ink ribbon, said method comprising collecting ink ribbon having an ink layer consisting of dye and binder resin, dissolving the ink layer of ink ribbon in a solvent in which dye and binder resin are soluble, freeing the resulting solution of insoluble matter, concentrating the solution, pouring the resulting concentrate into a solvent in which dye is soluble but binder resin is substantially insoluble, thereby precipitating binder resin, and separating and drying precipitates. By concentrating the solution remaining after precipitation of binder resin and drying the concentrate, it is possible to recover dye. Disclosed also herein is an apparatus for recovering dye and binder resin according to said method.Type: GrantFiled: October 8, 1996Date of Patent: July 14, 1998Assignee: Sony CorporationInventors: Hidemi Tomita, Huy Sam, Haruo Watanabe, Misao Kusunoki
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Patent number: 5766485Abstract: Alum process residues (APR) are used to remove colored contaminants from waste waters. In addition, in accordance with the invention, up to 0.1% by weight of alum and up to 5 ppm of a polyelectrolyte polymer is added to improve color removal, turbidity removal and the settling rate. The resultant APR-alum-polymer mixture together with contaminants in the waste water settles rapidly, reducing the costs of the color removal process.Type: GrantFiled: June 6, 1995Date of Patent: June 16, 1998Assignee: General Chemical CorporationInventors: Christopher Bruce Lind, David Kisling Kennedy
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Patent number: 5750034Abstract: The invention comprises a method for clarifying ink-laden water obtained from the recycling of paper stocks by treating said water with a conventional coagulant followed by treatment with a hydrophilic dispersion polymer. The hydrophilic dispersion flocculant of the invention is a copolymer of dimethylaminoethyl (meth)acrylate methyl chloride quat (DMAEA.multidot.MCQ) cationic monomer and (meth)acrylamide (AcAm). Following dosing with the flocculant, a floc is formed. The floc contains ink and impurities which are removed from the water process stream by means of solid liquid separation; the solid liquid separation comprising a dissolved air flotation method.Type: GrantFiled: November 1, 1996Date of Patent: May 12, 1998Assignee: Nalco Chemical CompanyInventors: Jane B. Wong Shing, Karen R. Tubergen
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Patent number: 5750035Abstract: A process for dye removal from effluent is disclosed which includes treating the effluent with a reducing agent, adjusting the pH to a selected value in the range of 2-7, treating the effluent with a particular charge neutralization mixture, adjusting the pH a second time and subjecting the mixture to a flocculating process with selected chemicals.Type: GrantFiled: September 20, 1996Date of Patent: May 12, 1998Assignee: Hoechst Celanese CorporationInventors: Paul W. Shepperd, III, Larry W. Becker, Robert J. Cundiff
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Patent number: 5738795Abstract: Copolymers of low molecular weight polysaccharides and cationic monomers, their method of production and method of using as water treatment agents are disclosed. Preferably the copolymer comprises alginic acid and methyl chloride quaternary salt of dimethylaminoethyl acrylate.Type: GrantFiled: June 14, 1996Date of Patent: April 14, 1998Assignee: BetzDearborn Inc.Inventor: Jen-Chi Chen
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Patent number: 5707532Abstract: Compositions comprising polyamine and melamine polymers in certain ratios are provided for coagulating suspended solids in wastewaters such as deinking process waters and raw waters.Type: GrantFiled: September 17, 1996Date of Patent: January 13, 1998Assignee: Cytec Technology Corp.Inventors: Gerald Guerro, Wendy L. DiNicola, Nicole Richards
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Patent number: 5702607Abstract: An on-site automated closed loop petroleum based hydrocarbon fluid filtration and recycling system that continuously recycles a spent petroleum based hydrocarbon fluid and simultaneously continuously dispenses the recycled petroleum based hydrocarbon fluid.Type: GrantFiled: July 8, 1996Date of Patent: December 30, 1997Inventor: David M. Lawson