From Natural Source Or Chemical Modification Thereof Patents (Class 210/730)
  • Patent number: 7514007
    Abstract: A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: April 7, 2009
    Assignee: WSP Chemicals & Technology, LLC
    Inventors: Shih-Ruey T Chen, Valentino L. DeVito, Kevin W. Frederick
  • Publication number: 20090026142
    Abstract: Disclosed herein is a purification method characterized by adding a chitosan powder or a chitosan-coated substance, and optionally further adding a silica sol to liquor and filtering the mixture by a filter machine to remove unsaturated fatty acids, compounds of unsaturated fatty acids with metal ions, or fusel oil from the liquor.
    Type: Application
    Filed: April 8, 2005
    Publication date: January 29, 2009
    Inventors: Toshio Kadowaki, Takao Nakahara
  • Patent number: 7419605
    Abstract: A method for removing metal contaminants from water uses lignin derivatives, such as lignosulfonates and kraft lignin, a coagulant, such as a metal salt, and a pH-increasing composition. The lignin derivative is dispersed in the contaminated water, the coagulant is added and the pH is adjusted as required to cause flocculation. A sludge is formed that contains the metals and that is separated from the treated water by filtration. Related methods are used to reduce the leachable metal content of contaminated soils. The invention also provides a composition for stabilizing the metal contaminants in soil, comprising lignin derivatives, a coagulant and a composition for increasing the pH. The mixture is blended with the contaminated soil, reducing its leachable metal content.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: September 2, 2008
    Assignee: Noram Engineering and Constructors Ltd.
    Inventor: J. Ming Zhuang
  • Publication number: 20080135492
    Abstract: Tannin based environmentally friendly polymeric coagulants are disclosed which are copolymers of naturally occurring tannins, dialdehyde and diamines. In a preferred embodiment, the dialdehyde is glyoxal and the diamine is dimethylamino propylamine.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 12, 2008
    Inventors: Ashok Shyadligeri, Narain Madhavan
  • Patent number: 7384573
    Abstract: Methods and compositions for wastewater treatment. The compositions comprise CaCO3, MgCO3, lanthanum chloride, or chitosan, and can be applied easily with conventional wastewater treatment processes and equipments. The methods and compositions of the present invention significantly improve treatment efficiency and reduce amount of required chemical additives.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: June 10, 2008
    Inventor: Ken Brummett
  • Publication number: 20080121588
    Abstract: A system and method is disclosed for pre-treating water to remove substantial amounts of particulates prior to filtration. A coagulant, such as chitosan is mixed with turbid water and adheres to particulate matter to form large clumps. The water/coagulant mixture is placed in a first reservoir elevated above a second reservoir having a strip of porous material, such as polyester felt, positioned with one end in the first reservoir and another end above the second reservoir and preferably below the waterline in the first reservoir. A middle portion of the porous material is elevated above the first and second ends, but at a height relative to the waterline of the first reservoir that is equal or less than the height water will rise in the porous material due to capillary action.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 29, 2008
    Applicant: NATURAL SITE SOLUTIONS, LLC
    Inventor: John W. Macpherson
  • Patent number: 7374690
    Abstract: Processes for removing oil from a solid wellbore material such as drill cuttings or water such as produced by a subterranean formation include contacting the solid material/water with an amino-substituted polymer such as chitosan and a halogenating agent. The oil separates from the solid material and becomes bound within a flocculated solid. The flocculated solid containing the oil subsequently may be combined with a solvent of the amino-substituted polymer. Further, the flocculated solid may be contacted with a reducing agent, converting the flocculated solid back into the amino-substitute polymer and forming an oil-phase separate from the solvent-phase. The oil-phase may then be separated from the solvent phase and recovered. The solvent in which the amino-substituted polymer is dissolved may be recycled for treating more solid material removed from the well bore.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: May 20, 2008
    Assignee: Halliburton Energy Services, Inc.
    Inventor: B. Raghava Reddy
  • Patent number: 7264729
    Abstract: This invention relates to a process for reducing the contaminants in condensate resulting from the conversion of bauxite to alumina.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: September 4, 2007
    Assignee: Ashland Licensing and Intellectual Property LLC
    Inventor: Emmett R. Yawn
  • Patent number: 7192527
    Abstract: Processes for removing oil from a solid wellbore material such as drill cuttings or water such as produced by a subterranean formation include contacting the solid material/water with an amino-substituted polymer such as chitosan and a halogenating agent. The oil separates from the solid material and becomes bound within a flocculated solid. The flocculated solid containing the oil subsequently may be combined with a solvent of the amino-substituted polymer. Further, the flocculated solid may be contacted with a reducing agent, converting the flocculated solid back into the amino-substitute polymer and forming an oil-phase separate from the solvent-phase. The oil-phase may then be separated from the solvent phase and recovered. The solvent in which the amino-substituted polymer is dissolved may be recycled for treating more solid material removed from the well bore.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: March 20, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventor: B. Raghava Reddy
  • Patent number: 7169309
    Abstract: The invention relates to a particular polymer which is derived from a copolymer polysaccharide formed by a main chain comprising similar or different anhydrohexose units and branches including at least one neutral or anionic anhydropentose and/or anhydrohexose unit. Moreover, the invention relates to the use of said polymer in the treatment of aqueous media, in particular the treatment of aqueous effluents containing heavy metals, the treatment of waste water, drinking water and for sludge conditioning. Said derivative polymer comprises one or more units bearing an oxime function at least at position C2.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: January 30, 2007
    Assignee: Rhodia Chimie
    Inventors: Etienne Fleury, Cécile Bonnet-Gonnet, Yvette Pescher
  • Patent number: 7157009
    Abstract: A method for stabilizing and removing Cryptosporidium oocysts or Giardia cysts from water. The method comprises adding chitosan, a salt or solution of chitosan to water containing Cryptosporidium oocysts or Giardia cysts and a halogenating agent. The method may also include adding a secondary polyelectrolyte flocculant to the water. The resulting flocs are filtered to remove the Cryptosporidium oocysts or Giardia cysts.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: January 2, 2007
    Assignee: Vanson Halosource, Inc.
    Inventors: Everett J. Nichols, Jeffrey F. Williams
  • Patent number: 7048859
    Abstract: A process is provided which can be used to clarify substantially aqueous streams and optionally separate biosolids, especially proteins, from food processing operations which comprises contacting an aqueous stream comprising biosolids with an anionic inorganic colloid and an organic polymer to flocculate the biosolids.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 23, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Harvey Moffett
  • Patent number: 7033507
    Abstract: A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an alkaline composition for increasing the pH. The lignin derivatives are dispersed in the wastewater and the coagulant is added, increasing the pH to about 4.5–8.5 and causing the formation of a floc. The alkaline composition is then added to bring the pH to about 9 to 10, causing the further formation of a floc. Optionally, air oxidation is carried out, reducing the pH to about 8.1–8.6. Optionally, a ferric or ferrous salt may also be added. The flocs comprise metal-lignin colloids, metal hydroxides and metal salts. The flocs coagulate to form a sludge. Optionally, fly ash or diatomaceous earth may be added to increase the density and stability of the sludge. The sludge that is formed contains the metals and is separated from the treated water by filtration.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: April 25, 2006
    Assignee: Noram Engineering and Constructors Ltd.
    Inventor: J. Ming Zhuang
  • Patent number: 6846417
    Abstract: The invention relates to a process to produce brine of improved purity by dissolving salt that contains a calcium sulfate source in water, in the presence of a retarding agent, while using one or more co-retardants to bind contaminants that could interfere with the retarding agents.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: January 25, 2005
    Assignee: Akzo Nobel N.V.
    Inventors: Mateo Jozef Jacques Mayer, René Lodewijk Maria Demmer
  • Patent number: 6846420
    Abstract: The present invention provides a process and an additive package for removing oil from solid material recovered from a well bore, e.g., drill cuttings and produced sand. In this process, the solid material is passed from the well bore to a separation zone. An aqueous acidic solution containing a polymer substituted with an amino group is introduced to the separation zone containing the solid material along with a halogenating agent and optionally one or more surfactants. The polymer, halogenating agent, and optional surfactant constitute the additive package. The polymer substituted with an amino group is preferably chitosan, and the halogenating agent is preferably a sodium hypochlorite solution. The mixture formed in the separation zone is agitated to cause a product of a reaction between the polymer and the halogenating agent to contact the solid material and remove residual oil therefrom.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: January 25, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Sears T. Dealy, Ian D. Robb
  • 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: 6821440
    Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is pumped as a fluid then allowed to stand and rigidify and the rigidification is improved whilst retaining the pump ability of the material by combining polymeric particles with the material during or prior to pumping the material, wherein the polymeric particles comprise water soluble polymer which has an intrinsic viscosity of at least 3 dl/g. The process of the invention more effectively minimises the area taken up by a stack of the material of given volume whilst maintaining the pumpability of the material. This invention is particularly suited to material that comprises red mud from the Bayer alumina process.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: November 23, 2004
    Assignee: Ciba Specialty Chemicals Watertreatments Limited
    Inventors: Michael Gerard Gallagher, Hal G. Smith, Stephen Adkins, Anne Frances Hooley, Brian Dymond
  • Publication number: 20040195185
    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: Application
    Filed: April 20, 2004
    Publication date: October 7, 2004
    Applicant: Vanson Halosource, Inc.
    Inventors: John Wallace Macpherson, Jason Jacob Ziemer, Everett J. Nichols
  • Patent number: 6726845
    Abstract: The claimed invention is a method for separating Bayer process red mud from a Bayer process liquor which comprises adding to a Bayer process liquor containing red mud an effective amount of a water soluble synthetic flocculant, dextran and starch combination. The flocculant is added anywhere in the slurry containing the red mud suspended in Bayer process liquor, or in a liquor slurry containing bauxite prior to or during digestion. Once the flocculant combination is added, it is mixed sequentially with the Bayer process liquor and the red mud contained in the Bayer process liquor is removed by sedimentation, centrifugation or filtration.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: April 27, 2004
    Assignee: Ondeo Nalco Company
    Inventors: Scott Barham, James Morton Tippett
  • 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: 6712969
    Abstract: A method of phosphorous reduction in stormwater runoff using iron humate, such as in the form of a filter, a layered filter bed, a stacked wall or a liner. The stormwater (fluid) runoff is sent to a fluid retention area such as a retention pond, wetland reservoir or the like where the runoff is filtered through iron humate. While the runoff is filtered, the iron humate absorbs or chemically retains the phosphorous in the runoff to produce filtered runoff with a reduced level of phosphorous. In an alternate embodiment, the runoff can be pumped from a retention pond into a iron humate filter where the runoff is filtered. In another alternate embodiment, the iron humate filter may be placed in a trench below ground to intercept and filter groundwater flows.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: March 30, 2004
    Inventor: Larry Madrid
  • Patent number: 6676840
    Abstract: The precipitation and removal of suspended fat and protein components and other suspended solids from a given solution can be accomplished by the addition of an aluminate to complex with the fat and protein components and the addition of a flocculating agent to flocculate the aluminate/fat and protein component complexes into insoluble particles capable of removal by conventional technology, which insoluble particles can be rendered to produce tallow.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: January 13, 2004
    Assignee: Power Engineering Company
    Inventors: Bryon J. Tarbet, Robert D. Hancock, Jeffrey W. Zidek
  • Patent number: 6673263
    Abstract: A composition and method for treating oversprayed paints in paint spray booths is provided. The composition includes an aqueous solution of a compound such as chitosan, and a complex metal salt, such as aluminum chlorohydrate, capable of flocculating the oversprayed paint, and optionally, bentonite clay. The composition is useful for detackifying and flocculating oversprayed paint, and is particularly useful as a liquid concentrate for the addition to wash systems in paint spray booths for water-based and solvent-based paints. The composition is also useful in decreasing the time for phase separation of the organic phase and the aqueous phase in solvent-based removal processes.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: January 6, 2004
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Michael L. Albu, Phillip J. Beauchamp
  • 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: 6555010
    Abstract: A process is disclosed for obtaining colloid-forming metal particles from an aqueous mine waste solution containing that metal in ionic form. In accordance with this process, an aqueous mine waste solution containing that metal in ionic form is provided having a pH value of about 4.0 to about 6.5. The solution is electrified with direct current a about 1.2 to about 2.0 volts to reduce the desired metal ions to colloidal metal particles. A slurry of cellulose particles is agitatingly added to the colloid composition followed by a flocculant to form a solid phase cellulosic floc containing the colloid. The solid and liquid phases are separated, and the solid phase is dried, fluxed and heated to a temperature sufficient to melt the flux and colloid and form larger metal particles that can then be recovered. The colloid-forming metal is preferably gold.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: April 29, 2003
    Inventor: Keith Barrett
  • Patent number: 6533938
    Abstract: A method is describe for removing metal ions of interest from aqueous solutions containing low concentrations of the metal ions of interest. The method involves the use of a microbially produced polymer, &ggr;-glutamic acid. The polymer is used in conjunction with tangential flow filtration and results in substantial removal of metal ions.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: March 18, 2003
    Assignee: Worcester Polytechnic Institue
    Inventors: Alexander Dilorio, Sonny Mark, Philip A. Tongue
  • 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
  • Patent number: 6478986
    Abstract: The present invention refers to a process for preparing a coagulating/flocculating agent comprising the following steps: a) mixing an aldehyde, an ammonium salt, and a mineral acid catalyst in a reaction vat at a temperature below 45° C. in an aqueous medium; b) reacting said mixture by heating said mixture until a colorless liquid is obtained; c) reacting said obtained colorless liquid with an aqueous tannin solution by stirring and heating to obtain a viscous liquid; and d) optionally, atomizing said viscous liquid to obtain a uniformly grained powder.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: November 12, 2002
    Assignee: Tanac S.A.
    Inventors: Luiz Henrique Lamb, Otávio Guimarães Decusati
  • Publication number: 20020144951
    Abstract: Compositions and methods for treating water are provided. Pursuant to the present invention, a modified protein coagulant composition for treating water is provided that includes a quaternized protein having a protein and a cationic monomer. The present invention has been found useful for treating industrial waters relating to, for example, the paper, mining, food, agriculture, and waste treatment industries.
    Type: Application
    Filed: December 21, 2000
    Publication date: October 10, 2002
    Inventors: Jawed Sarkar, Manian Ramesh
  • Patent number: 6444128
    Abstract: The precipitation and removal of suspended organic containing particles, such as starch, and other suspended solids from a given solution can be accomplished by the addition of multivalent metal ions and their complexes in order to form metal ion/organic particle complexes and the addition of a flocculating agent to flocculate the metal ion/organic particle complexes into insoluble particles capable of removal by conventional technology.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: September 3, 2002
    Assignee: Power Engineering Company
    Inventors: Bryon J. Tarbet, Robert D. Hancock, Jeffrey W. Zidek
  • Patent number: 6423234
    Abstract: A process for optimizing the rate of oxidation using halogen, e.g. chlorine donors to prevent the accumulation of undesirable chlorinated by-products. The feed rate of a chlorine donor is controlled for maintaining a desired ORP. The amount of free halogen is reduced and the ORP range expanded by addition of an effective amount of a coagulating agent. The rate of oxidation is sufficient to prevent the accumulation of the undesirable by-products. Treatment removes the by-products from the water and surrounding air by maintaining continuous breakpoint halogenation conditions.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: July 23, 2002
    Assignee: United States Filter Corporation
    Inventor: Roy Martin
  • Patent number: 6409926
    Abstract: A process for optimizing the rate of oxidation using a combination of halogen, e.g. chlorine donors and peroxygen, e.g. potassium monopersulfate. The peroxygen compound elevates the oxidation-reduction potential of the body of water being treated. Simultaneously, a halogen donor is added to the body of water to maintain a PPM level of free halogen sufficient to insure sanitization. The amount of free halogen is reduced and the ORP effective range expanded to 700-850 mv by addition of an effective amount of a coagulating agent. The feed rates and concentrations of both oxidizers are optimized so as to achieve and maintain the targeted parameters. A high level of oxidation is maintained which removes by-products from the water and surrounding air.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: June 25, 2002
    Assignee: United States Filter Corporation
    Inventor: Roy Martin
  • Patent number: 6379559
    Abstract: The aim of this invention is to resolve problems in sludge treatment methods, and to render sludge containing harmful substances produced in large amounts in chromium plating works harmless with reproducibility by effective use of certain substances. The invention resolves these problems by separating metal ions such as iron, copper, zinc and chromium contained in chromium plating effluent or a mixed solution of chromium plating solution, chromium plating effluent and chromic acid wash water in an impurity recovery electrolysis tank A in the form of a sludge, extracting the sludge, washing the sludge with water, separating the wash water containing chromic acid, drying the sludge which sedimented in the water washing step by natural or assisted drying, adding a natural organic substance to the sludge and reduction calcinating the sludge.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: April 30, 2002
    Inventor: Hideomi Iida
  • 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: 6372145
    Abstract: The precipitation and removal of suspended fat and protein components and other suspended solids from a given solution can be accomplished by the addition of an aluminate to complex with the fat and protein components and the addition of a flocculating agent to flocculate the aluminate/fat and protein component complexes into insoluble particles capable of removal by conventional technology, which insoluble particles can be rendered to produce tallow.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: April 16, 2002
    Assignee: Power Engineering Company
    Inventors: Bryon J. Tarbet, Robert D. Hancock, Jeffrey W. Zidek
  • Patent number: 6365116
    Abstract: The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a viscosity modifier to the settled mud and in front of the rake blade by pumping the viscosity modifier down the rake arm to an area in front of the rake blade. The method also includes an improved rake mechanism that includes a means for delivering viscosity modifier to the settled mud and in front of the rake blade. The present invention also includes a method for increasing the rate of consolidation of flocculated solids in a slurry.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: April 2, 2002
    Assignee: Nalco Chemical Company
    Inventors: Scott Lewis Barham, Raymond Leslie Henderson
  • Patent number: 6346616
    Abstract: There are described chloro-, hydroxy- and alkoxysilane derivatives of polysaccharides or oligosaccharides as novel compounds which are polymerizable and cross-linkable, and a method for obtaining them; novel support materials obtained from said derivatives and containing said silane derivatives of polysaccharides or oligosaccharides chemically grafted by a covalent bond with the support and polymerized and cross-linked in a three-dimensional network and a method for obtaining them; as well as the use of said material supports in separation or in preparation of enantiomers, through employment in gaseous, liquid or supercritical chromatography, by electrophoresis, electrochromatography or by percolation processes through membranes containing said support materials.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: February 12, 2002
    Assignees: Institut Francais du Petrole, Chiralsep S.A.R.L.
    Inventor: Raphaël Duval
  • Publication number: 20010054586
    Abstract: Bacterially generated polymers used as coagulants and flocculents for the removal of suspended solids from wastewater. Polymer producing bacteria such as Bacillus polymyxa NRRL 21881 are added to wastewater treatment systems. The bacteria reproduce in the system, substantially increasing the number of coagulants. Throughout their lives, the bacteria treat BOD5 in the system. When BOD5 levels are sufficiently low, the bacteria will produce polymers to increase their ability to capture organic matter. The polymers will capture the suspended particles in the water, creating strands of polymer connected particles. As different strands come into contact, they will become entwined, creating flocs. These flocs will combine and absorb the suspended particles which they encounter. If the flow of the system becomes laminar, the flocs will agglomerate to densities sufficient to allow them to fall out of suspension. The result is a reduction in effluent TSS without an offsetting increase in BOD5.
    Type: Application
    Filed: March 21, 2001
    Publication date: December 27, 2001
    Inventors: John A. Christiansen, Erik Rumbaugh
  • Publication number: 20010050255
    Abstract: A process is disclosed for obtaining colloid-forming metal particles from an aqueous mine waste solution containing that metal in ionic form. In accordance with this process, an aqueous mine waste solution containing that metal in ionic form is provided having a pH value of about 4.0 to about 6.5. The solution is electrified with direct current a about 1.2 to about 2.0 volts to reduce the desired metal ions to colloidal metal particles. A slurry of cellulose particles is agitatingly added to the colloid composition followed by a flocculant to form a solid phase cellulosic floc containing the colloid. The solid and liquid phases are separated, and the solid phase is dried, fluxed and heated to a temperature sufficient to melt the flux and colloid and form larger metal particles that can then be recovered. The colloid-forming metal is preferably gold.
    Type: Application
    Filed: February 14, 2001
    Publication date: December 13, 2001
    Inventor: Keith Barrett
  • Patent number: 6280628
    Abstract: Heavy metals including lead, copper, zinc, and cadmium, are effectively extracted from sludge mixtures by treatment of the mixture with carboxyl derivatives of fructans, having a degree of substitution of 0.2-3.0.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: August 28, 2001
    Assignee: Cooperatie Cosun U.A.
    Inventors: Mariëtte Ellen Boukje Bolkenbaas, Hendrika Cornelia Kuzee, Henricus Wilhelmus Carolina Raaijmakers
  • Patent number: 6261459
    Abstract: An improved process for the treatment of water, selected from livestock wastewater and a livestock water stream, which process comprises adding to said water a composition comprising a sufficient amount of an acid to lower the water pH to less than 3.5 to 2.0; and wherein said acid is selected from the group of 1,3,5-Triazine-2,4,6-(1H,3H,5H)-hydroxyalkyltriglyoxilic acid (PR-1409SA); 2,2-oxy-diacetic acid; 2,2-ether diglycolic acid; sulfamic acid; and sulfuric acid.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: July 17, 2001
    Assignee: Polymer Research Corporation
    Inventor: John J. Waldmann
  • Patent number: 6261460
    Abstract: 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: Grant
    Filed: March 23, 1999
    Date of Patent: July 17, 2001
    Inventors: James A. Benn, Kenneth C. Thode
  • Patent number: 6231768
    Abstract: The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the settled mud. The method includes the step of delivering a viscosity modifier to the settled mud and in front of the rake blade by pumping the viscosity modifier down the rake arm to an area in front of the rake blade. The method also includes an improved rake mechanism that includes a means for delivering viscosity modifier to the settled mud and in front of the rake blade. The present invention also includes a method for increasing the rate of consolidation of flocculated solids in a slurry.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: May 15, 2001
    Assignee: Nalco Chemical Company
    Inventors: Scott Lewis Barham, Raymond Leslie Henderson
  • Patent number: 6214230
    Abstract: The invention comprises the use of bacterially generated polymers as coagulants and flocculents for the removal of suspended solids from wastewater. Polymer producing bacteria such as Bacillus polymyxa NRRL 21881 are added to wastewater treatment systems. The bacteria will reproduce in the system, substantially increasing the number of coagulants over the amount of original bacteria introduced. Throughout their life cycles, the bacteria will biologically treat BOD5 in the system. When the BOD5 levels are sufficiently low, the bacteria will produce polymers to increase their ability to capture organic matter. The polymers will capture the suspended particles in the water, creating strands of polymer connected particles. As the strands come into contact with one another, the strands will become entwined, creating flocs. These flocs will combine and will absorb the suspended particles which they encounter.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: April 10, 2001
    Assignee: International Biochemicals Group, Ltd.
    Inventors: John A. Christiansen, Erik Rumbaugh
  • Patent number: 6203711
    Abstract: A process is provided which can be used, for example, to clarify substantially aqueous fluids and separate solids from the fluid. The process comprises combining the fluid with a composition which comprises an anionic silica-based colloid having an S value of less than 50% and a cationic organic polymer.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: March 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Harvey Moffett
  • Patent number: 6139751
    Abstract: Heavy metals can be effectively complexed with a derivative of a fructan, which derivative contains complexing groups chosen from --X--CY--ZM, --X--CY--ZM, --X--CY--S--S--CY--X--Q, --PY'(--Z'M).sub.2, --SO.sub.3 M and --NR--CH.sub.2 --COOM, where M is a metal or hydrogen, Q denotes the residue of an alcohol or polyol, R is hydrogen or carboxymethyl and X, Y, Y', Z and Z', independently of one another, are O, S or NH and at least one of X, Y and Z is S, with a degree of substitution of 0.1-2.5. The complexing groups are in particular xanthate, xanthide or dithiocarbamate groups.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: October 31, 2000
    Assignee: Cooperatie Cosun U.A.
    Inventors: Piet Marc Paul Bogaert, Theodoor Maximiliaan Slaghek, Henricus Wilhelmus Carolina Raaijmakers
  • Patent number: 6132625
    Abstract: A process is provided which can be used to clarify substantially aqueous streams and optionally separate biosolids, especially proteins, from food processing operations which comprises contacting an aqueous stream comprising biosolids with an anionic inorganic colloid and an organic polymer, to flocculate the biosolids.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: October 17, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert Harvey Moffett
  • Patent number: 6043405
    Abstract: A method and treatment composition for neutralizing formaldehdye. The treatment composition contains polyethylenimine, urea and an acid having a pH of less than 6. Treatment of formaldehyde solutions with the treatment composition results in a suspension that it easily disposable and non-toxic.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: March 28, 2000
    Assignee: Isolyser Company, Inc.
    Inventors: Travis W. Honeycutt, Baosheng Lee, Youshen Ding, Ashley Myers, Dong Dai
  • Patent number: 6039875
    Abstract: The invention comprises the use of bacterially generated polymers as coagulants and flocculents for the removal of suspended solids from wastewater. Polymer producing bacteria such as Bacillus polymyxa NRRL 21881 are added to wastewater treatment systems. The bacteria will reproduce in the system, substantially increasing the number of coagulants over the amount of original bacteria introduced. Throughout their life cycles, the bacteria will biologically treat BOD.sub.5 in the system. When the BOD.sub.5 levels are sufficiently low, the bacteria will produce polymers to increase their ability to capture organic matter. The polymers will capture the suspended particles in the water, creating strands of polymer connected particles. As the strands come into contact with one another, the strands will become entwined, creating flocs. These flocs will combine and will absorb the suspended particles which they encounter.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: March 21, 2000
    Assignee: Interbio, Inc.
    Inventors: John A. Christiansen, Erik Rumbaugh
  • Patent number: 5979012
    Abstract: A mobile surface contaminant extracting and water recycling apparatus comprises a standard truck, pickup, trailer or other wheeled container that is modified by the addition of a clay-based flocculent powder wastewater treatment unit. Mounted in combination with the wheeled container and the wastewater treatment unit is a vacuum steam cleaning unit. Steam is sent from the cleaning unit and sprayed by pressure guns onto the contaminated surface of a parking lot or other surface to be cleaned. The surface contaminants become emulsified in water condensed from the steam, which contaminated water then is vacuumed up by cleaning wands and returned by hose to the steam cleaning unit on the truck bed. From the steam unit, the contaminated water is piped to the adjacent truck-mounted wastewater treatment unit. The water is churned in the latter unit in the presence clay-based powder. The resultant floc sludge is deposited on top of porous cloth on a draining tray or trays.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: November 9, 1999
    Assignee: Parker West International, L.L.C.
    Inventor: Gary Fritz