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| Number | Title | Issue Date |
| 7431845 | Method of clarifying oily waste water A method of clarifying oily waste water comprising adding to the waste water an effective clarifying amount of one or more demulsifiers selected from the group consisting of dendritic polyamines, dendritic polyamidoamines and hyperbranched polyethyleneimines and the... | 10/07/2008 |
| 7375173 | Ecofriendly cationic polyelectrolytes The invention relates to cationic water-soluble polyelectrolytes, especially terpolymers, which are obtained by polymerising monomers of (meth)acrylamide, a quaternised (meth)acrylamide derivative, a (meth)acrylic acid derivative and/or hydrolysis-stable cationic mo... | 05/20/2008 |
| 7374690 | Processes for removing oil from solid wellbore materials and produced water 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 se... | 05/20/2008 |
| 7344647 | Process for treating waste water to remove contaminants Recycled waste water is treated to remove contaminants and produce a sludge cake with a high percentage of solids and to produce a treated recycled waste water that can be discharged into a municipal sewer system. ... | 03/18/2008 |
| 7341668 | Filter aid and method of using same for reclaiming water-based fluids used in metal working processes A filter aid and a method of using the same are disclosed that effectively removes contaminants from water-based metal forming liquids used in aluminum forming, rolling and other metal working processes. The filter aid includes a cellulosic material and a cationic p... | 03/11/2008 |
| 7338605 | Filter aid and method of using same for reclaiming water-based fluids used in metal working processes A filter aid and a method of using the same are disclosed that effectively removes contaminants from water-based metal forming liquids used in aluminum forming, rolling and other metal working processes. The filter aid includes a cellulosic material and a cationic p... | 03/04/2008 |
| 7338604 | Process for recycling paint flush solution A process for removing solids from a water-based flush solution, The process includes: providing dirty flush solution; directing the dirty flush solution to a treatment vessel; adding one or more chemicals to the treatment vessel to form a treated flush solution; se... | 03/04/2008 |
| 7338608 | Solid-liquid separation of oil-based muds This invention relates to a method of achieving a solid-liquid separation of an oil-based mud comprising the step of contacting said oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, where the polymer is... | 03/04/2008 |
| 7264729 | Process for reducing contaminants in condensate resulting from the conversion of bauxite to alumina This invention relates to a process for reducing the contaminants in condensate resulting from the conversion of bauxite to alumina. ... | 09/04/2007 |
| 7264736 | Removal of non-water soluble substances from solutions of aqueous metal extracts The invention relates to methods and a device for the removal of non-water soluble substances from solutions of aqueous metal extracts, by addition of at least one water-soluble cationic polyelectrolyte, containing a diallylaminoalkyl(meth)acrylamide, neutralized or... | 09/04/2007 |
| 7229525 | Methods to enhance pulp bleaching and delignification A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and cl... | 06/12/2007 |
| 7212825 | Network communication system using a single reservation request made with randomly generated information to identify a node A network communication system is provided for communication between network nodes, including individual nodes and a central control station node. In the network, signals are transmitted from the central control node to identify specific timeslots in which individua... | 05/01/2007 |
| 7209748 | Network communication system using a single reservation request over one or more assigned frequencies to identify a node A network communication system is provided for communication between network nodes, including individual nodes and a central control station node. In the network, signals are transmitted from the central control node to identify one or more frequencies that the node... | 04/24/2007 |
| 7200406 | Network communication system using a single reservation request made from a node to transmit its data A network communication system is provided for communication between network nodes, including individual nodes and a central control station node. In the network, signals are transmitted from the central control node to identify specific timeslots in which individua... | 04/03/2007 |
| 7192527 | Processes for removing oil from solid wellbore materials and produced water 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 se... | 03/20/2007 |
| 7179385 | Method for treating paint booth water systems 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 ... | 02/20/2007 |
| 7166758 | Foam and gel methods for the decontamination of metallic surfaces Decontamination of nuclear facilities is necessary to reduce the radiation field during normal operations and decommissioning of complex equipment. In this invention, we discuss gel and foam based diphosphonic acid (HEDPA) chemical solutions that are unique in that ... | 01/23/2007 |
| 7138472 | High molecular weight polymers containing pendant salicylic acid groups for clarifying bayer process liquors A high molecular weight, water-soluble polymer comprising pendant salicylic acid groups and having a weight average molecular weight of at least about 2,000,000 daltons and use of the polymer for clarifying red mud-containing liquors generated in the Bayer process f... | 11/21/2006 |
| 7063792 | Method for separating metals such as zirconium and hafnium A method for separating a metal (a) from a metal (2), preferably zirconium from hafnium, which consists in dissolving said metals in an aqueous solution wherein said metals are in a state preventing them from passing through a nanofiltration membrane; treating the a... | 06/20/2006 |
| 7063793 | Apparatus and method for removing mercury and mercuric compounds from dental effluents The present invention is directed to processes for removing a contaminant from dental effluents and includes transporting a three-phase effluent through a suction line into a particle collection vessel, introducing a suction line cleaning solution which includes a r... | 06/20/2006 |
| 7048859 | Method for treatment of aqueous streams comprising biosolids 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 collo... | 05/23/2006 |
| 6926832 | Method of using water soluble polymers in a membrane biological reactor A method of conditioning mixed liquor in a membrane biological reactor comprising adding to the mixed liquor an effective coagulating and flocculating amount of one or more water soluble cationic, amphoteric or zwitterionic polymers, or combination thereof and metho... | 08/09/2005 |
| 6821440 | Treatment of mineral materials 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 w... | 11/23/2004 |
| 6818131 | System and process for CU-CMP wastewater treatment 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... | 11/16/2004 |
| 6733672 | System and method for the treatment of soot-laden water A system and method for treatment of soot-laden waste water is disclosed. The method comprises the steps of separating the soot from the waste water initially in a clarifier. The concentrated soot is then treated with an activated sludge mixture in a digester with a... | 05/11/2004 |
| 6723245 | Method of using water soluble cationic polymers in membrane biological reactors A method of conditioning an activated sludge in a membrane biological reactor comprising (i) adding to the activated sludge an effective amount of at least one water soluble cationic polymer to form a mixture of water and coagulated and flocculated suspended ... | 04/20/2004 |
| 6702946 | Aqueous dispersions Aqueous dispersions of cationic water-soluble polymers are provided, as well as processes for making and methods of using the same.... | 03/09/2004 |
| 6635182 | Floatation process for removal of heavy metal waste and associated apparatus The present invention is a floatation process and associated apparatus for removing heavy metal waste from various effluent water streams. The process and apparatus generally introduces a population of fine diameter air bubbles and one or more flocculatin... | 10/21/2003 |
| 6627087 | Method of removing lead from water using a high molecular weight cationic dispersion polymer A method of removing lead from water comprising a) adjusting the pH of the water to about 7 to about 9; and b) adding to the water an effective amount of a water soluble, high molecular weight cationic dispersion polymer composed of i) (meth)acrylamide;... | 09/30/2003 |
| 6627086 | Methods of producing polyarylamines and using them for detackifying paint and removing color from aqueous systems 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 ary... | 09/30/2003 |
| 6613230 | Method for simultaneous removal of arsenic and fluoride from aqueous solutions A method of removing arsenic and fluoride from aqueous solutions in the same process is provided. Specifically, the pH of the aqueous solution is adjusted to a pH in the range of about 5 to 8. A combination of calcium salts, and ferric or aluminum salts a... | 09/02/2003 |
| 6610209 | Use of polymers containing vinylamine/vinylformamide for the treatment of food processing wastewater A method for clarifying food processing waste water containing suspended solids comprising (iii) adding to the waste water with an effective amount of at least one vinylamine polymer having a molecular weight of at least 10,000, wherein the polymer is... | 08/26/2003 |
| 6576594 | Water treatment process 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 concentra... | 06/10/2003 |
| 6527959 | Method of clarifying bayer process liquors using salicylic acid containing polymers 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.... | 03/04/2003 |
| 6428705 | Process and apparatus for high flow and low pressure impurity removal 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 particu... | 08/06/2002 |
| 6423234 | Air and water purification using continuous breakpoint halogenation 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 haloge... | 07/23/2002 |
| 6420312 | Water treatment composition 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 cop... | 07/16/2002 |
| 6409926 | Air and water purification using continuous breakpoint halogenation and peroxygenation 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. Simulta... | 06/25/2002 |
| 6379555 | Wastewater treatment process using an admixed paste of activated carbon and magnesium hydroxide Wastewater treatment processes and preferred systems for practice of the processes, the invention particularly intends the removal of particulates and dissolved materials contaminating the effluent of garment stonewashing, acid washing and similar process... | 04/30/2002 |
| 6358364 | Method for flocculating a papermaking furnish using colloidal borosilicates The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or s... | 03/19/2002 |
