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| Number | Title | Issue Date |
| 7381332 | 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... | 06/03/2008 |
| 7378023 | Method of improving membrane bioreactor performance Cationic polymers having a molecular weight greater than about 200,000 can be added to the activated sludge in an MBR for industrial wastewater treatment for reasons, which include: conditioning the activated sludge; improving flux through a membrane in the MBR; red... | 05/27/2008 |
| 7347945 | Method and an installation for separating out multiphase effluents The invention relates to a method and to an installation for separating out an effluent made up of a multi-phase fluid mixture. According to the invention, said installation includes gravity separator means whose geometrical separation characteristics can be adjuste... | 03/25/2008 |
| 7344648 | Use of silicones for causing or facilitating the flow of dispersions of solid particulates in liquids A method for causing or facilitating the flow of dispersions of solid particulates in liquids, having characteristics of high viscosity or resistance to flow, with particular reference to sludges from purification plants of civil or industrial wastes, which method c... | 03/18/2008 |
| 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 |
| 7335310 | Method of treating wastewater containing hardly decomposable harmful substances A method of treating hardly decomposable harmful substance comprising (A) a step for adding coagulant into wastewater containing a hardly decomposable harmful substance, (B) a step for performing solid-liquid separation which separates a solid containing the hardly ... | 02/26/2008 |
| 7279513 | Preparation of neutralized ethylene-acrylic acid polymer dispersions and use in printing media for improvement of digital toner adhesion Aqueous dispersions comprising one or more ethylene-acrylic acid polymers and an effective dispersing amount of one or more N,N-dialkylalkanolamines are useful for preparing substrates for use in electrophotographic or digital offset printing processes. ... | 10/09/2007 |
| 7273556 | Method for treating water containing manganese The invention concerns a method for treating water for human consumption, so as to eliminate manganese and possibly other metals comprising steps which consist in: causing said water to pass at least over a bed of filtering material (3) consisting at least pa... | 09/25/2007 |
| 7250462 | Amphoteric water-soluble polymer dispersion and use thereof The invention relates to an amphoteric water-soluble polymer dispersion containing polymer particles with particle diameters of 100 μm or smaller and produced by dispersion-copolymerization of a monomer mixture comprising a methacrylate monomer containing a quatern... | 07/31/2007 |
| 7229559 | Dual-action decontamination method Hydrophobic polymer particles (e.g., granules or fragments) employed as filter media, e.g., for filtering runoff water, include an antimicrobial compound on exterior surfaces and can reduce proliferation of microbial organisms as well as sorb chemical contaminants f... | 06/12/2007 |
| 7223348 | Method and apparatus for separation of a mixture of non-miscible liquids The present invention provides a new and improved method and apparatus for separating a disperse mixture of two non-miscible liquids to increase the separation extent within less time required as per usual. The proposed method includes the steps of providing a tank ... | 05/29/2007 |
| 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 |
| 7160452 | Filter device A filtration device that enables efficient cleansing and rinsing of filtration media within a short time, in which filtration sand is not likely to become clogged, and in which unevenness within filtration sand is not likely to occur comprising a screw conveyor 3... | 01/09/2007 |
| 7157010 | Polymeric flocculant infused silt fence A polymeric flocculant infused silt fence assembly comprising two opposing and attached geo-textile sheets, each adapted to filter entrained non-colloidal particles and together encasing a layer of polymeric flocculant material. In a preferred embodiment the polymer... | 01/02/2007 |
| 7153436 | Method for enhancing cyclonic vessel efficiency with polymeric additives The present invention is directed to a novel method and system for enhancing the efficiency of hydraulic centrifugal separators (cyclones) in the removal of fine size particles from a liquid carrying medium. More particularly, it is concerned with improvements in th... | 12/26/2006 |
| 7150834 | Multiple laminar flow-based rate zonal or isopycnic separation with holographic optical trapping of blood cells and other static components The invention provides a method and apparatus for separating blood into components, may be expanded to include other types of cellular components, and can be combined with holographic optical manipulation or other forms of optical tweezing. One of the exemplary meth... | 12/19/2006 |
| 7147783 | Method for reducing hydrogen sulfide emissions from wastewater A cost-effective method for reducing the dissolved sulfide content in a wastewater stream and thereby hydrogen sulfide emissions therefrom involving the steps of adding a transition metal salt to the wastewater stream at the upper reaches of a wastewater collection ... | 12/12/2006 |
| 7125823 | Methods of making dual-action decontamination media Hydrophobic polymer particles (e.g., granules or fragments) employed as filter media, e.g., for filtering runoff water, include an antimicrobial compound on exterior surfaces and can reduce proliferation of microbial organisms as well as sorb chemical contaminants f... | 10/24/2006 |
| 7118676 | Multiple laminar flow-based particle and cellular separation with laser steering The invention provides a method, apparatus and system for separating blood and other types of cellular components, and can be combined with holographic optical trapping manipulation or other forms of optical tweezing. One of the exemplary methods includes providing ... | 10/10/2006 |
| 7014775 | Method for mixing additives with sludge in a powered line blender A powered in-line blender for mixing additives to sludges or other flowable liquid/solid mixtures. The blender is particularly useful in a method of blending polymer to municipal sewage sludges to improve the dewatering characteristics, and thus improving total cost... | 03/21/2006 |
| 6982036 | Chemically enhanced primary sludge fermentation method A method of treating wastewater to increase effluent volatile fatty acid content consisting of providing wastewater to a primary treatment vessel and adding a select quantity of a chemical, typically an aluminum or iron salt, to the wastewater, enhancing the separat... | 01/03/2006 |
| 6979405 | Flocculation of mineral suspensions A method of dewatering an aqueous mineral suspension comprising introducing into the suspension a flocculating system comprising, a) a substantially non-ionic polymeric flocculant and b) an anionic polymeric flocculant, characterised in that, the substantially non-i... | 12/27/2005 |
| 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 |
| 6858093 | Method for paint detackification using compositions containing chitosan 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... | 02/22/2005 |
| 6855260 | Methods of enhancing fine particle dewatering 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 ... | 02/15/2005 |
| 6835314 | Method and apparatus for remediating wastewater holding areas and the like A method and apparatus for remediating wastewater holding areas and the like includes a closed, foraminous dewatering membrane that is positioned adjacent to the wastewater holding area. Sludge and adjacent water on the bottom of the wastewater holding area are pump... | 12/28/2004 |
| 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 |
| 6797180 | Dewatering sand with surfactants Methods of enhancing the dewatering of sand are disclosed. The methods include adding an anionic or nonionic surfactant to the wet sand prior to dewatering. ... | 09/28/2004 |
| 6759185 | Method for reuse of loaded developer A method for the refreshment and reuse of loaded developers used in lithographic printing is disclosed. A polyoxyalkylene derivative is added to a silicate-containing loaded developer. Insoluble material is separated and the alkalinity level of the resulting essenti... | 07/06/2004 |
| 6723249 | Detoxification of onium compounds A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the use of certain additives is described. Suitable additives include, but are not necessarily limited to, carboxylic acids (e.g. naphthenic acids), sulfo... | 04/20/2004 |
| 6716358 | Demulsification of water-in-oil emulsions The invention includes a method for demulsification of water-in-oil emulsions. ... | 04/06/2004 |
| 6716357 | Method of removing phosphoric acid containting wastewater 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... | 04/06/2004 |
| 6689400 | Process of obtaining compositions of stable lutein and lutein derivatives The present invention concerns methods of obtaining stable lutein and its derivatives. Additionally, the invention concerns various compositions comprising lutein, lutein esters, tetrahydrocurcuminoids, and carnosic acid.... | 02/10/2004 |
| 6617421 | Method for producing substantially dry water-insoluble polymers for improved flocculation in the Bayer process The present invention is a method of producing substantially dry water insoluble polymers from poly alkyl esters of vinylic monomers for use in a method for the clarification of red mud-containing liquors generated in the Bayer process for the recovery of... | 09/09/2003 |
| 6596176 | Potable water treatable process using hydrogen peroxide and metallic coagulant A process for the purification of water includes the addition of hydrogen peroxide and metallic coagulants in order to remove organic contaminants. Metallic coagulants increase the oxidative activity of hydrogen peroxide, while also causing the oxidized b... | 07/22/2003 |
| 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 |
| 6555009 | Demulsification of water-in-oil emulsions The invention includes a method for demulsification of water-in-oil emulsions.... | 04/29/2003 |
| 6544425 | Method for dewatering coal tailings and slurries and removing contaminants therefrom 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 tailin... | 04/08/2003 |
| 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 |
| 6372882 | Method for producing substantially dry water-insoluble polymers for improved flocculation in the bayer process The present invention is a method of producing substantially dry water insoluble polymers from poly alkyl esters of vinylic monomers for use in a method for the clarification of red mud-containing liquors generated in the Bayer process for the recovery of... | 04/16/2002 |
