Including Organic Agent Patents (Class 210/728)
  • Patent number: 6881346
    Abstract: Compositions including alum, a smectite material and optionally one or more of a buffer and an algaecide coating or additives for the clarification of bodies of water by removal of dissolved solids, dissolved organic materials and other anions such as fluoride and chloride as well as the removal of total phosphorus from such bodies of water. The compositions are designed to be delivered to concentrated or impounded phosphorus located at the bottom of various bodies of water and may be produced in various physical forms.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: April 19, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Charles R. Landis, Steven R. Gray
  • Patent number: 6881349
    Abstract: A mobile apparatus and method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oleaginous component and an aqueous component. The apparatus includes an emulsion breaking tank, a water treatment tank, a filter press, and hydrocarbon filters. The method includes: mixing said invert emulsion drilling fluid with a emulsion breaker, wherein the emulsion breaker is a mixture of an alkyl glucoside and an alkane sulfonate; and separating the oleaginous component of the invert emulsion drilling fluid from the aqueous component of the invert emulsion drilling fluid. The method preferably utilizes an emulsion breaker that is a combination of an anionic surfactant, a nonionic surfactant and an alkyl polyglycoside surfactant.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: April 19, 2005
    Assignee: M-I LLC
    Inventor: Frank Manfred Franz Mueller
  • Patent number: 6855260
    Abstract: A new method of improving the process of dewatering fine particulate materials is disclosed. In this method, an aqueous slurry of fine particles is treated with appropriate hydrophobizing reagents so that the particulate material becomes moderately hydrophobic with its water contact angle considerably below 90°. A low hydrophile-lipophile balance (HLB) number surfactant is then added to the slurry, so that the surfactant molecules adsorb on the moderately hydrophobic surface primarily by hydrophobic attraction and, thereby, increase its contact angle close to or above 90°. By virtue of the greatly enhanced hydrophobicity, the water molecules adhering to the surface are destabilized and removed more readily by a mechanical dewatering process. Any nonionic surfactant with its HLB number below about 15 may be used for the hydrophobicity enhancement. The surfactants may be used in conjunction with appropriate solvents such as light hydrocarbon oils and short-chain alcohols.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: February 15, 2005
    Inventor: Roe-Hoan Yoon
  • Patent number: 6843932
    Abstract: Contaminated sediments in such bodies of water as lakes and ponds, inner bays and rivers obtained by dredging are converted into favorable soils by adding to the contaminated sediments and aqueous solution formed by mixing an inorganic electrolytic coagulant obtained by mixing phosphonic acid and magnesium sulfate in a solvent not containing chlorine, stirring them for several minutes and then mixing aluminum sulfate and polyferric sulfate and stirring them for several minutes, together with a soil particle reinforcing agent and a pH controller.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: January 18, 2005
    Inventors: Kayohiko Tanimoto, Munehiko Kaga, Masami Gibo
  • Publication number: 20040245181
    Abstract: The invention is a composition and method for treating paint booth water systems to facilitate paint removal. The composition comprises water, solid particles of insoluble organic polymer, such as, by way of non-limiting example, urea methanal copolymer, preferably including less than 50 weight percent of particles of diameter of 1 micron or less, and optionally surfactants, thickeners, polymeric flocculents different from the organic polymer, clarifiers, anti-corrosive components, and/or biocides.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 9, 2004
    Inventor: Kathryn E. Foster
  • Patent number: 6827874
    Abstract: Compositions, methods and kits for purifying, clarifying nutrifying and any combination thereof, contaminated drinking water, which contain a primary coagulant material and a bridging flocculent material. The levels and ratios of coagulant to flocculent preferably fall within certain ranges. Highly preferred compositions also contain one or more of a cationic coagulant aid, especially chitosan, a microbiocidal disinfectant, a water-soluble alkali, a water-insoluble silicate, and a food additive or nutrient source.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: December 7, 2004
    Assignee: The Procter & Gamble Co.
    Inventors: Philip Frank Souter, Colin Ure
  • Publication number: 20040232085
    Abstract: Disclosed herein is a method for dewatering sewage sludge by using sludge-coal-oil co-agglomeration (“SOCA”) which comprises the steps of physically, chemically or biologically conditioning sludge to impart hydrophobicity and lipophilicity to the sludge (conditioning step), supplying oil and coal to the conditioned sludge with stirring to form sludge-coal-oil agglomerates (agglomerating step), enlarging the particle diameter of sludge-coal-oil agglomerates (size enlargement step), and remaining the enlarged sludge-coal-oil agglomerates over a sieve to selectively separate them from hydrophilic materials dispersed in tailing water(screening step).
    Type: Application
    Filed: February 19, 2004
    Publication date: November 25, 2004
    Applicant: Korea Institute of Energy Research
    Inventors: Sung-Kyu Kang, Hyun-Dong Shin
  • Patent number: 6821427
    Abstract: In one aspect the present invention provides purification devices for reducing the amount of contaminants in water, each device includes a water-soluble flocculant disposed within a body defining a multiplicity of pores, wherein the pores have an average diameter in the range of from 1 &mgr;m to 2000 &mgr;m. The present invention also provides methods for reducing the amount of contaminants in water.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: November 23, 2004
    Assignee: Vanson Halosource, Inc.
    Inventors: John Wallace Macpherson, Jason Jacob Ziemer, Everett J. Nichols
  • Patent number: 6818131
    Abstract: A system for the treatment of CMP wastewater, including wastewater from a copper CMP process. The wastewater treatment system includes a coagulant supply tank from which an FSC polymer coagulant is directed into a reaction tank that separately receives the untreated wastewater. The coagulant may be mixed with the untreated wastewater in selected ratios to provide a desired dosing quantity of the coagulant in the reaction tank. As the wastewater and the FSC polymer coagulant are mixed in the reaction tank, the coagulant flocs the slurry chemicals in the wastewater and removes the chemicals from solution in the wastewater as a precipitate before the wastewater is directed to a clarifier. The clarifier separates the flocked precipitate from the wastewater, and the flocked particles settle on the bottom of the clarifier to form a sludge. The sludge is re-distributed back into the clarifier to coagulate inert particles in the wastewater.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: November 16, 2004
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Max Sha, Howard Ting, Anderson Chen, Lung Chi Yang
  • Patent number: 6805803
    Abstract: A process of flocculating and dewatering an aqueous suspension of suspended solids comprising, introducing into the suspension, (a) a concentrated polymer solution and, (b) a dilute polymer solution, characterised in that the concentrated and dilute polymer solutions are introduced into the substrate substantially simultaneously. Preferably the concentrated and dilute polymer solutions are introduced into the suspension as an aqueous composition comprising a dilute aqueous solution of polymer and a concentrated solution of polymer. The process brings about improvements in filtration and cake solids.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: October 19, 2004
    Assignee: Ciba Specialty Chemicals Water Treatments Ltd.
    Inventors: Steven Weir, Mark John Stringer
  • Patent number: 6805802
    Abstract: 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: Grant
    Filed: July 25, 2002
    Date of Patent: October 19, 2004
    Assignee: General Chemical Corporation
    Inventors: Christopher Bruce Lind, Raymond T. Pettyjohn
  • Patent number: 6797049
    Abstract: The invention relates to a mixture and a process for the treatment of waste materials and the use of the mixture for the treatment of waste materials and waste material treated therewith. The mixture comprises (A) at least one zinc salt of a saturated or unsaturated aliphatic or aromatic carboxylic acid, (B) at least one calcium salt of a saturated or unsaturated aliphatic or aromatic carboxylic acid, (C) at least one hydrophobing agent, (D) at least on amino alcohol and (E) NH3.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: September 28, 2004
    Assignee: Geodur Cis AG
    Inventor: Wolfgang Schwetlick
  • Publication number: 20040154999
    Abstract: A biocidal compsition includes, in combination, poly(texamethylene) biguanide, didecydimethylammonium chloride a homogenising agent and a flocculating agent. The biocidal composition is used to treat water to control microorganisms.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 12, 2004
    Inventor: Nicolaas Duneas
  • Patent number: 6767465
    Abstract: A process for recovering fine coals and clarifying water for recycling features with three distinct mechanisms: hydrophobic extraction, electrolyte coagulation, and macromolecular flocculation, which if desired may be integrated into a single stage. The hydrophobic extraction is accomplished using oil to form a coal-in-oil mixture. The process water is clarified using a flocculants, more preferably a combination of coagulant and anionic flocculants. With a well defined reagent addition scheme, this process allows a combustible recovery greater than 88% at an ash content less than 11%, while producing a clean water containing less than 20 ppm suspended solids from a tailing's stream. The coal-in-oil mixture may be used as a fuel for example in coal-firing boilers and power generators.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: July 27, 2004
    Assignee: Govenors of the University of Alberta
    Inventors: Jaewon Choung, Jozef Szymanski, Zhenghe Xu
  • Patent number: 6716357
    Abstract: A method of removing phosphoric acid contained in wastewater which comprises comprehensively immobilizing calcium or a compound thereof with a solid polymer optionally together with magnetite and contacting the calcium-containing polymer with the wastewater to react the phosphoric acid contained in the wastewater with the calcium and thereby yield calcium apatite.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: April 6, 2004
    Assignee: Japan Science and Technology Corporation
    Inventors: Takaaki Maekawa, Kazuo Fujita
  • Patent number: 6706144
    Abstract: A method of dewatering an aqueous cellulosic pulp slurry comprising adding to an aqueous slurry of washed cellulosic pulp an effective dewatering amount of a mixture of one or more nonionic surfactants and one or more anionic surfactants.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: March 16, 2004
    Assignee: Ondeo Nalco Company
    Inventors: Gary S. Furman, Jr., James J. Svarz
  • Publication number: 20040026331
    Abstract: The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mineral and/or rock particles, heavy metals, salts, phosphorous compounds, alcohols, lipids, aromatics and cellulose. The precipitating chemical is composed of bentonite, preferably sodium montmorillonite; of polymer, preferably of the polyacrylamide type; of sodium polyphosphate and/or lignite; and of water. The chemical is added to and mixed with waste liquid, after which chemical precipitation is activated through the addition of acid or base until the pH-value of the liquid mixture is 4.0 or less, or the pH-value being 8.0 or more. The liquid mixture then rests until the contaminant(s) flakes and separates from the liquid phase of the mixture and is then deposited or floated from the liquid mixture.
    Type: Application
    Filed: September 23, 2002
    Publication date: February 12, 2004
    Inventor: Stig Ovar Keller
  • Patent number: 6656377
    Abstract: A coagulant which is the reaction product of a trivalent metal salt, 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: Grant
    Filed: May 21, 2001
    Date of Patent: December 2, 2003
    Assignee: Calgon Corporation
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Publication number: 20030209499
    Abstract: A process and method for liquid-solid separation in raw water by chemical treatment, comprising adding into the water, separately or together, an effective amount of at least one aluminum polymer with an effective amount of an ammonium polymer, including at least one medium, high, or very high molecular weight ammonium polymer, to clarify said raw water to a settled turbidity standard, and including methods for blending and storing solution polymers.
    Type: Application
    Filed: April 15, 2003
    Publication date: November 13, 2003
    Inventor: Richard A. Haase
  • Patent number: 6627086
    Abstract: 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: Grant
    Filed: March 21, 2001
    Date of Patent: September 30, 2003
    Assignee: Polymer Ventures, Inc.
    Inventors: Robert P. Mahoney, Christopher B. Murphy, Michael Dugan
  • Patent number: 6602410
    Abstract: A kit for purifying water comprises a first container for receiving untreated water, and a second container for receiving purified water and having a dispensing spigot. A water purification composition, when mixed with water in the first container, produces partially purified water having solid matter. A first filter held in a filter holder at an upper end of the second container removes the solid matter when the partially purified water is poured from the first container. A second filter in the second container comprises carbon.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: August 5, 2003
    Assignee: The Procter & Gamble Comapny
    Inventors: John D. Tanner, David J. Emmons, Ward William Ostendorf, Kathleen Grieshop Baier, Jesus Velazquez, Christy Ann Olson, Philip Frank Souter, Colin Ure
  • Patent number: 6599337
    Abstract: A method for selecting an effective removal agent and a method of removing drag reducer additive from liquid hydrocarbon fuels, preferably gasoline or jet fuel.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: July 29, 2003
    Assignee: Southwest Research Institute
    Inventor: John Andrew Waynick
  • Patent number: 6576594
    Abstract: A method of controlling algae in a municipal water plant including the step of adding an algicide-flocculant solution including 25-50 wt % acidic flocculent, 0-10 wt % polymer flocculant aid, an algicide consisting essentially of copper having a concentration of 0.025-1.275 wt % in the form of a water soluble copper salt, balance water. The algicide-flocculant solution may be added to the water via a clarifier of the water plant, a basin of the water plant, or a mixing chamber. The mixing chamber may be located within the clarifier, adjacent to the basin, or upstream of the clarifier and/or the basin.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: June 10, 2003
    Assignee: Bay Chemical and Supply Company
    Inventors: Thomas J. Nier, Tosby L. Linn
  • Patent number: 6544425
    Abstract: A method of dewatering a mixture of coal tailings, water and contaminants comprising the steps of (a) providing a tank having a base surface and introducing said mixture of coal, tailings, water, and contaminants to said tank and allowing said coal tailings to settle on said base surface, (b) removing the coal tailings from said base surface of said tank along with water and contaminants and then separating said water and at least some of said contaminants from said coal tailings wherein said separated contaminants are suspended in said separated water, (c) adding an agent selected from one or more of the group consisting of a coagulant and a flocculent to said water and suspended contaminants separated from the coal tailings in step (b), (d) allowing the agent added in step (c) to coagulate or flocculate with the suspended contaminants to form a coagulated or flocculated mass and a quantity of supernatant water, and (e) separating the coagulated or flocculated mass formed in step (d) from the quantity of sup
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: April 8, 2003
    Assignee: Slurry Cleanup Environmental, Inc.
    Inventor: Olen O. Miller
  • Patent number: 6535795
    Abstract: The present invention provides a method for chemical addition utilizing adaptive process control optimizations having a combination of expert system(s), neural network(s) and genetic algorithm(s).
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: March 18, 2003
    Assignee: Baker Hughes Incorporated
    Inventors: Myron E. Schroeder, Marilyn W. Blaschke, Michael J. Zetlmeisl, David M. Fischer, Kenneth J. Tacchi
  • Publication number: 20030047515
    Abstract: The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mineral and/or rock particles, heavy metals, salts, phosphorous compounds, alcohols, lipids, aromatics and cellulose. The precipitating chemical is composed of bentonite, preferably sodium montmorillonite; of polymer, preferably of the polyacrylamide type; of sodium polyphosphate and/or lignite; and of water. The chemical is added to and mixed with waste liquid, after which chemical precipitation is activated through the addition of acid or base until the pH-value of the liquid mixture is 4.0 or less, or the pH-value being 8.0 or more. The liquid mixture then rests until the contaminant(s) flakes and separates from the liquid phase of the mixture and is then deposited or floated from the liquid mixture.
    Type: Application
    Filed: September 23, 2002
    Publication date: March 13, 2003
    Inventor: Stig Ovar Keller
  • Patent number: 6527959
    Abstract: A method of flocculating suspended solids in a Bayer process liquor comprising adding to the liquor an effective amount of a polymer comprising salicylic acid groups.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: March 4, 2003
    Assignee: Ondeo Nalco Company
    Inventors: Murat Quadir, Everett C. Phillips, Larry E. Brammer, Jr., Robert P. Mahoney, John D Kildea, Manian Ramesh, John T. Malito
  • Publication number: 20030034310
    Abstract: The present invention involves an improved integrated reactor and solids settler system for solids removal from a water stream. The integration of the rapid mix reactor and the solids settler of the present invention uses an overflow line from the rapid mix reactor to eliminate both the rapid mix reactor level indicator and controller and the flow controller in the solids settler clarified water outlet. The proposed design is simple, cost effective, and eliminates the possibility of unnecessary downstream unit shutdowns.
    Type: Application
    Filed: August 15, 2001
    Publication date: February 20, 2003
    Applicant: Texaco Inc.
    Inventor: Dinh-Cuong Vuong
  • Patent number: 6511611
    Abstract: 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: Grant
    Filed: March 11, 2002
    Date of Patent: January 28, 2003
    Assignee: Steen Research, LLC
    Inventors: Stephen R. Temple, Michael J. Stoltz
  • Patent number: 6491827
    Abstract: 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: Grant
    Filed: November 17, 2000
    Date of Patent: December 10, 2002
    Assignee: Steen Research, LLC
    Inventors: Stephen R. Temple, Michael J. Stoltz
  • Patent number: 6454961
    Abstract: An elixir to aid in the coagulation and flocculation of metal precipitates in wastewater, and to aid in their settling out of the wastewater solution, comprising: 1) a first cationic polyelectrolyte, 2) a solution comprising a second cationic polyelectrolyte, an acrylamide, and a cationic monomer, 3) a polymer with a high molecular weight and a high charge density, and 4) water.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6454963
    Abstract: An elixir for treating wastewater by transforming metal sulfates into metal hydroxides, breaking up chelated metals and transforming the freed metal ions into metal hydroxides, and precluding the metal hydroxides from dissolving back into solution. The elixir comprises: 1) calcium hydroxide, 2) METEX EPS, 3) sodium dimethyl dithiocarbamate, 4) calcium hypochlorite, 5) sodium hydroxide, 6) a combination of calcium salts and a first polymeric coagulant, 7) a second polymeric coagulant, and 8) water.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6454962
    Abstract: An elixir for treating wastewater by transforming metals into metal sulfates and sulfides, breaking up chelated metals, and precluding the metal sulfates and sulfides from redissolving back into the wastewater. The elixir comprises: 1) ferrous sulfate heptahydrate, 2) aluminum sulfate, 3) 75% sulfuric acid, 4) a blend of aluminum salts and a polymeric coagulant, and 5) water.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6454949
    Abstract: A process for removing metals from wastewater, which comprises the following: measuring the flow rate and oxidation reduction potential of wastewater as it is fed into a first treatment tank, adjusting the pH of the wastewater, adding a first liquid elixir to the wastewater to react with at least one metal in the wastewater to cause it to either precipitate out of solution, or convert into a form that will allow it to be precipitated out of solution by a second liquid elixir, and to bond with the metal to prevent it from re-dissolving back into solution, adding a second liquid elixir to the wastewater to react with at least one metal in the wastewater to cause it to precipitate out of solution, and to bond with the metal to prevent it from re-dissolving back into solution, feeding the wastewater into a second treatment tank, mixing a third liquid elixir and a fourth liquid elixir into the wastewater to flocculate and/or coagulate the precipitated metals, and separating the flocculated and/or coagulated precip
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6432315
    Abstract: 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: Grant
    Filed: October 10, 2000
    Date of Patent: August 13, 2002
    Assignee: Archer-Daniels-Midland Company
    Inventor: James J. Foster
  • Patent number: 6432321
    Abstract: An elixir to aid in the coagulation and flocculation of metal precipitates in wastewater, and to aid in their settling out of the wastewater solution, comprising: 1) a first anionic polymer with a high molecular weight and a high charge density, 2) a second anionic polymer with a high molecular weight, 3) a liquid emulsion anionic flocculant with a high molecular weight and a high charge density, and 4) water.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: August 13, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6428705
    Abstract: A process for removing contaminants from large volumes of wastewater is disclosed. The process involves treating a wastewater stream containing the contaminant with a coagulant that reacts with the contaminant to form a particulate or aggregate of particulates having a size greater than 10 &mgr;m. The treated wastewater is passed through a microfiltration membrane having a pore size in the range from 0.5 &mgr;m to 10 &mgr;m at low pressure (less than 20 psig) to remove the contaminant. Under such conditions, the treated wastewater flux rate is greater than 200 gallons per square foot of membrane per day (“GFD”), and typically from 200 to 1500 GFD.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: August 6, 2002
    Assignee: Microbar Incorporated
    Inventors: Stephen D. Allen, Josh H. Golden
  • Patent number: 6420312
    Abstract: An algicide-flocculant solution for use in treating raw water in a municipal water plant to control algae, the algicide-flocculant solution including 25-50 wt % of an acidic flocculant, 0-10 wt % of a polymer flocculant aid, an algicide of essentially copper having a concentration of 0.025-1.25 wt % in the form of a water soluble capper salt, and balance water. Uniform mixing of the flocculant into the raw water simultaneously uniformly mixes the algicide of the algicide-flocculant solution into the raw water. The acidic flocculant is preferably aluminium sulfate, iron sulfate, iron chloride or mixtures thereof. The water soluble copper salt is preferably copper sulfate, copper chloride, copper nitrate, copper acetate or mixtures thereof. Moreover, the flocculant aid is a high molecular weight quaternary amine such as diallyldimethylammonium chloride.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: July 16, 2002
    Assignee: Bay Chemical and Supply Company
    Inventors: Thomas J. Nier, Tosby L. Linn
  • Patent number: 6413433
    Abstract: A process for dewatering of sludge, wherein said sludge comprises solids and water, comprising the steps of: a) adding a cationic dispersion polymer and a microparticle to said sludge, wherein said cationic dispersion polymer can be added before or after or simultaneous with the addition of said microparticle; and b) physically separating said solids from said water.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: July 2, 2002
    Assignee: Nalco Chemical Company
    Inventors: Elise Maury, Livio Mattucci, Fernando Urbani, Massimo Borelli, John Sparapany
  • Patent number: 6398967
    Abstract: This invention is directed to a method of clarifying water comprising adding to the water an effective clarifying amount of a low molecular weight water-soluble cationic dispersion polymer prepared by polymerizing one or more cationic monomers and one or more nonionic monomers and one or more chain transfer agents under free radical forming conditions in an aqueous solution of an anionic salt in the presence of a stabilizer polymer, wherein the cationic dispersion has a cationic charge of from about 1.0 mole percent to about 75 mole percent and an RSV of from about 0.2 dl/g to about 6 dl/g.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: June 4, 2002
    Assignee: Nalco Chemical Company
    Inventors: John W. Sparapany, Richard P. Cardile, Cathy C. Johnson, Angela P. Zagala
  • Patent number: 6376561
    Abstract: Belt pressing or other pressure dewatering of a high solids mineral suspension is facilitated by flocculating the suspension by mixing into the suspension anionic flocculant having IV at least 5 dl/g and a minor amount of a cationic flocculant which generally has IV at least 4 dl/g. The flocculants are normally such that counterionic precipitation occurs.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: April 23, 2002
    Assignee: Ciba Specialty Chemicals Water Limited Treatments
    Inventors: Anthony Peter Allen, Philip McColl, George Thomas Staines
  • Patent number: 6375853
    Abstract: Naturally occurring lipids of vegetable and animal origin are broken into smaller molecules, and used as dewatering aids. The process of breaking the molecules include transesterification, interesterification, and saponification followed by acidulation. The modified lipid molecules can adsorb on the surface of the particles to be dewatered and greatly enhance their hydrophobicity, which will help increase the rate of dewatering and hence reduce cake moisture. The modified lipids are more effective dewatering aids than the naturally occurring unmodified lipids, possibly because they can more readily form close-packed monolayers of hydrophobes on the surface of the particles.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: April 23, 2002
    Inventor: Roe-Hoan Yoon
  • Patent number: 6372088
    Abstract: A process is disclosed for the production of paper and paper-like products from a suspension of papermaking materials to which poly(ethylene oxide) and a phenolic type cofactor which may be produced by a Williamson synthesis from a resin, are added to improve the retention of fibers, of fines, of dispersed extractives and of fillers during the processes of water removal for the manufacturing of paper.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: April 16, 2002
    Assignee: Pulp and Paper Reserch Institute of Canada
    Inventors: Gunar V. Laivins, Marco Polverari
  • Patent number: 6365052
    Abstract: This invention is directed to a method of dewatering animal farm waste water comprising: (1) adding an effective amount of a cationic dispersion polymer having an RSV of at least 24, the dispersion polymer prepared by polymerizing under free radical forming conditions in an aqueous solution of a water-soluble salt in the presence of one or more particle stabilizing polymers (i) from about 20 to about 90 mole percent nonionic monomers and (ii) from about 10 to about 80 mole percent of cationic monomers wherein the cationic monomers are selected from at least one hydrophilic cationic monomer and at least one hydrophobic cationic monomer and wherein less than 50 percent of the cationic monomers on a molar basis are hydrophobic monomers, (2) mixing the waste water and the cationic dispersion polymer to form a mixture of water and flocculated solids and (3) separating the flocculated solids from the water.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: April 2, 2002
    Assignee: Nalco Chemical Company
    Inventors: Ananthasubramanian Sivakumar, Cathy C. Johnson
  • Publication number: 20020008066
    Abstract: An osmosis or reverse osmosis process is improved by addition of a clathrate forming guest material in a solution to be purified. Addition of clathrate forming guest material to a solution to be filtered by reverse osmosis results in higher flow of permeate at lower pressure.
    Type: Application
    Filed: February 15, 2001
    Publication date: January 24, 2002
    Applicant: Earth Waters, Inc.
    Inventors: J. Adams Kirkpatrick, Gerald L. Brooks
  • Publication number: 20020000413
    Abstract: Disclosed is a method of removing heavy metals contained in exhaust gas which has been generated by burning a waste liquid containing the heavy metals discharged in a process of producing organic compounds. The method includes the steps in the order of: (a) a combustion step of burning the waste liquid to produce exhaust gas; (b) a gas-liquid contact step of rendering a liquid containing an alkali compound in contact with the exhaust gas to collect the heavy metals in bottoms of the liquid; and (c) a coagulating step of adding a coagulant to the bottoms to coagulate the heavy metals in the bottoms for removal of the heavy metals. According to this method, the heavy metals contained in the exhaust gas can be efficiently separated and removed.
    Type: Application
    Filed: June 29, 2001
    Publication date: January 3, 2002
    Inventors: Yukihiro Matsumoto, Takeshi Nishimura, Kazuto Okazaki, Kiyotaka Watanabe
  • Publication number: 20010052499
    Abstract: A process for treating waste water containing a resin is disclosed, which includes the steps of adding a polyamine compound to waste water containing at least a resin to coagulate at least water-insoluble matter in the water to form coagulated particles, adding a polyacrylamide polymer to cause those particles to grow into flocculated flocs, and separating the flocculated flocs. The process of the invention can treat waste water containing a resin in an industrially beneficial way without producing a large amount of sludge is disclosed.
    Type: Application
    Filed: September 10, 1999
    Publication date: December 20, 2001
    Applicant: TOSHIO NIIJIMA
    Inventor: TOSHIO NIIJIMA
  • Patent number: 6319412
    Abstract: 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: Grant
    Filed: June 28, 2000
    Date of Patent: November 20, 2001
    Assignee: New Working Waters, LLC
    Inventor: Crispen Reyna
  • Patent number: 6312601
    Abstract: A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the metal contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0.5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 700 gallons per square foot of membrane per day (“GFD”) to 1500 GFD. Solids are removed from the membrane surface by periodically backflushing the micro-filtration membranes and draining the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: November 6, 2001
    Assignee: Microbar Incorporated
    Inventors: Stephen D. Allen, Josh H. Golden
  • Patent number: 6312604
    Abstract: The present invention relates to compositions and methods for treating water to reduce the phosphate level thereof and control the growth therein of algae and other microorganisms by treating the water with an effective amount of a composition containing a lanthanide halide.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: November 6, 2001
    Assignee: Zodiac Pool Care, Inc.
    Inventors: Raymond P. Denkewicz, Jr., Ernest E. Senderov, Joseph W. Grenier, Therese Souza