Patents Examined by A. Hertzog
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Patent number: 7045112Abstract: Disclosed herein are compositions of a manganese sulfide (MnS) compound useful as additives for making a sintered product. Also disclosed herein is a method of making the composistions in which molybdenum (Mo) or Fe—Mo is added to the MnS compound to improve machinability and to obtain a more stable MnS compound, thereby reducing any change in weight and size in a sintering process. The compositions can suppress erosion of parts in a sintering furnace during a sintering process, prevent sooting on a surface of the sintered product from occurring, and enhance resistance to moisture in the air to keep the sintered product in the air for a long time.Type: GrantFiled: May 4, 2005Date of Patent: May 16, 2006Assignee: Kaya Ama Inc.Inventors: Dong Kyu Park, Hyung Bum Kim
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Patent number: 7045111Abstract: A process for co-producing anhydrous hydrogen bromide and a purified bisulfate salt by (a) reacting a bromide salt with sulfuric acid to produce crude hydrogen bromide and crude bisulfate salt; (b) purifying the crude hydrogen bromide to produce anhydrous hydrogen bromide; and (c) removing bromide from the crude bisulfate salt to form a purified bisulfate salt. There are also provided improvements in the bisulfate purification and bromine removal, whereby bromine is removed from the system by a distillation process and the bromide is removed from the crude bisulfate via a spray drying process.Type: GrantFiled: August 11, 2005Date of Patent: May 16, 2006Assignee: Poly Systems USA, Inc.Inventors: Richard J. DeGroot, Dov Shellef
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Patent number: 7045110Abstract: A batch process for co-producing anhydrous hydrogen bromide and a purified bisulfate salt comprising: (a) charging a batch reactor with a bromide salt slurry, wherein the slurry is more than 50% by weight bromide salt; (b) reacting the slurry with sulfuric acid in a batch reaction wherein bromide salt is consumed to produce crude aqueous hydrogen bromide and crude bisulfate salt, the crude bisulfate salt containing bromine; (c) prior to or concurrently with step (b) adding hydrogen bromide to the reactor; (d) purifying the crude hydrogen bromide to produce anhydrous hydrogen bromide; and (e) removing bromine from the crude bisulfate salt to form a purified bisulfate salt.Type: GrantFiled: January 5, 2005Date of Patent: May 16, 2006Assignee: Poly Systems USA, Inc.Inventors: Richard J. DeGroot, Dov Shellef
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Patent number: 7041268Abstract: The present invention is directed to a novel integrated process for the recovery of sulphate of potash (SOP) from sulphate rich bittern. The process requires bittern and lime as raw materials. Kainite type mixed salt is obtained by fractional crystallization of the bittern, and is converted to schoenite which is subsequently reacted with muriate of potash (MOP) for its conversion to SOP. End liquor from kainite to schoenite conversion (SEL) is desulphated and supplemented with MgCl2 using end bittern generated in the process of making carnallite. Decomposed carnallite liquor produced is reacted with hydrated lime for preparing CaCl2 solution and high purity Mg(OH)2 having low boron content. It is shown that the liquid streams containing potash are recycled in the process, and the recovery of potash in the form of SOP is quantitative.Type: GrantFiled: March 30, 2004Date of Patent: May 9, 2006Assignee: Council of Scientific and Industrial ResearchInventors: Pushpito Kumar Ghosh, Kaushik Jethalal Langalia, Maheshkumar Ramniklal Gandhi, Rohit Harshadray Dave, Himanshu Labhshanker Joshi, Rajinder Nath Vohra, Vadakke Puthoor Mohandas, Sohan Lal Daga, Koushik Halder, Hasina Hajibhai Deraiya, Ramjibhai Devjibhai Rathod, Abdulhamid Usmanbhai Hamidani
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Patent number: 7037474Abstract: A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions may include at least one of: sulfidic waste water, kraft caustic liquor, kraft carbonate liquor, potassium sulfide, sodium sulfide, and thioacetamide. The sulfide ion source is introduced into the scrubbing liquor as an aqueous sulfide species. The scrubber may be either a wet or dry scrubber for flue gas desulfurization systems.Type: GrantFiled: December 20, 2002Date of Patent: May 2, 2006Assignees: The Babcock & Wilcox Company, McDermott Technology, Inc.Inventors: Paul S. Nolan, William Downs, Ralph T. Bailey, Stanley J. Vecci
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Patent number: 7037482Abstract: A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and sulphate from the solution and controlling the amount of sulphate extracted by selective adjustment of the acidity of the aqueous solution.Type: GrantFiled: March 10, 2003Date of Patent: May 2, 2006Assignee: Teck Cominco Metals Ltd.Inventors: Cashman R. S. Mason, Juris R. Harlamovs, David B. Dreisinger, Baruch Grinbaum
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Patent number: 7033564Abstract: A selenating reagent obtained by reacting lithium aluminum hydride with selenium powder in an organic solvent. In addition, a method for preparing a selenating reagent includes reacting lithium aluminum hydride with selenium powder in an organic solvent. Also, a method of preparing a selenium-containing product includes reacting the selenating reagent, prepared as stated, with at least one second compound which may be acyl chloride.Type: GrantFiled: August 2, 2002Date of Patent: April 25, 2006Assignee: Gifu UniversityInventors: Mamoru Koketsu, Hideharu Ishihara
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Patent number: 7033565Abstract: A process for the production of sulphuric acid from a sulphur dioxide containing feed gas with concentration of SO2 fluctuating between 0 and 100 mole % SO2 comprising the steps of contacting the feed gas with an aqueous solution comprising 0–50% by weight H2SO4 at a temperature between the freezing point of said aqueous solution and 80° C.; and during the contact of the feed gas with the aqueous solution absorbing at least a part of SO2 in the feed gas in the aqueous solution or desorbing at least a part of SO2 from the aqueous solution, wherein the at least a part of SO2 is desorbed by stripping the aqueous solution with the feed gas and passing at least part of the thus treated feed gas to a sulphuric acid plant.Type: GrantFiled: August 6, 2004Date of Patent: April 25, 2006Assignee: Haldor Topsoe A/SInventors: Kurt Agerbæk Christensen, Peter Schoubye
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Patent number: 7033557Abstract: Method and apparatus are provided for removing contaminants from a hydrogen processor feed stream, as in a fuel cell power plant (110). Inlet oxidant (38), typically air, required by a catalytic hydrogen processor (34) in a fuel processor (14) for a fuel cell stack assembly (12) in the power plant (110), may contain contaminants such as SO2 and the like. A cleansing arrangement, which includes an accumulator/degasifier (142, 46) acting as a scrubber, and possibly also a water transfer device (118), receives the inlet oxidant and provides the desired cleansing of contaminants. Water in the water transfer device and in the accumulator/degasifier serves to dissolve the water-soluble contaminants and cleanse them from the oxidant stream. The cleansed oxidant stream (138?) is then delivered to the hydrogen processor and to the fuel cell assembly, with minimal inclusion of detrimental contaminants such as sulfur.Type: GrantFiled: September 27, 2005Date of Patent: April 25, 2006Assignee: UTC Fuel Cells, LLCInventors: Albert P. Grasso, Bryan F. Dufner, Jay C. Files, John L. Preston, Jr.
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Patent number: 7030287Abstract: A method of decreasing nitrate nitrogen and volatile organic compounds in soil and groundwater by burying a fatty acid having 10 or more carbon atoms, an alcohol having 12 or more carbon atoms, an ester of a linear saturated fatty acid having 14 or more carbon atoms and a monohydric alcohol, an ester of a linear saturated fatty acid having 14 or more carbon atoms and a polyhydric alcohol, an ester of a fatty acid having 16 or more carbon atoms and glycerine, and the like in soil containing nitrate nitrogen and volatile organic compounds or by contacting groundwater with same. This method allows for on site treatment, high biological denitrification and a decrease in volatile organic compounds secondary pollution by the release of organic matter and nitrogen into the environment.Type: GrantFiled: April 6, 2005Date of Patent: April 18, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: {umlaut over (K)}oichiro Murasawa, Hitoshi Komoda, Masaru Makino
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Patent number: 7029639Abstract: A desulfurization apparatus for desulfurizing a flue gas containing sulfur oxides through contact with a porous carbon material. The carbon material, which is provided in a desulfurization tower, is at least one species selected from activated carbon and activated carbon fiber. The apparatus contains an NO2-gas-feeding apparatus for feeding NO2 gas into the desulfurization tower. Within the desulfurization tower, a showering mechanism is provided at the top, the showering mechanism adjusting water content of the flue gas in the desulfurization tower to that corresponding to saturation with water vapor or higher at the treatment temperature.Type: GrantFiled: April 3, 2002Date of Patent: April 18, 2006Assignees: Osaka Gas Co., Ltd., Mitsubishi Heavy Industries, Ltd.Inventors: Akinori Yasutake, Norihisa Kobayashi, Takashi Kurisaki, Masaaki Yoshikawa
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Patent number: 7021049Abstract: An automobile exhaust system includes a catalytic converter, a NOx trap, and a sulfur oxide trap. The sulfur oxide trap improves the efficiency of the NOx trap. Sulfur oxide has a deleterious effect on the performance of nitrogen oxide traps. The sulfur oxide trap comprises a monolithic substrate which is over-coated with an aluminum oxide layer and a mixed oxide layer of calcium oxide and magnesium oxide. In a variation, a sulfur oxide trap is integrated with a nitrogen oxide trap by coating the catalyst contained within a nitrogen oxide trap with a mixed oxide layer of calcium oxide and magnesium oxide. In each embodiment, the sulfur oxide trap can be regenerated by heating at elevated temperature for a short time period.Type: GrantFiled: November 22, 2002Date of Patent: April 4, 2006Assignee: Ford Global Technologies, LLCInventors: Amy Berris, Jun (John) Li, Mohinder Singh Chattha, William Lewis Henderson Watkins
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Patent number: 7022168Abstract: In a method for removing carbon dioxide from the exhaust gas from a gas turbine plant (11), which exhaust gas is subjected to a downstream heat recovery process (12, 33), preferably in the heat recovery steam generator (33) of a water/steam cycle (12), a simplification of the plant engineering is achieved by the fact that the carbon dioxide is removed from the exhaust gas (39) between the gas turbine plant (11) and the heat recovery process (12, 33), and that a rotating, regenerative absorber/desorber (22) is used to remove the carbon dioxide, the absorber side of which absorber/desorber is connected into the exhaust gas stream (39) and the desorber side of which absorber/desorber is connected into a carbon dioxide cycle (38).Type: GrantFiled: April 10, 2003Date of Patent: April 4, 2006Assignee: Alstom Technology LTDInventors: Armin Schimkat, Juergen Baum
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Patent number: 7018606Abstract: A process and apparatus are presented for obtaining inorganic fullerene-like nanostructures. A metal oxide is evaporated at predetermined temperature conditions, and is swept towards a reacting zone, to which first and second gas phase reacting agents are concurrently swept. The evaporated metal oxide thus interacts with the first reacting agent and is converted into metal suboxide nanoparticles in the gas phase. The condensing metal suboxide nanoparticles interact with the second reacting agent in the gas phase resulting in substantially pure phase of the inorganic fullerene-like nanoparticles.Type: GrantFiled: October 25, 2001Date of Patent: March 28, 2006Assignee: Yeda Research and Development Co. Ltd.Inventors: Reshef Tenne, Yishay Feldman, Alla Zak, Rita Rosentsveig
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Patent number: 7019190Abstract: A process and apparatus for energy efficient remediation of soil contaminated with hydrocarbons, including desorbing the hydrocarbon contaminants from a bed of the soil by thermal desorption in a treated desorption chamber (20) and thereafter combusting the contaminants in a thermal oxidiser (30). The combustion air for the desorption chamber and the thermal oxidiser, and the desorbed contaminants prior to admission to said thermal oxidiser, are preheated by heat exchange (40) with offgases from the thermal oxidiser. The offgases are then rapidly quenched at below 200° C.Type: GrantFiled: September 16, 1999Date of Patent: March 28, 2006Assignee: Innova Soil Technology PTY LTDInventors: John Anthony Lucas, Louis James Wibberley
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Patent number: 7018603Abstract: A process for the production of a lithium transition metal sulphide such as lithium iron sulphide, the process comprising reacting a transition metal sulphide with lithium sulphide in a solvent comprising a molten salt or a mixture of molten salts. Lithium transition metal sulphides obtained using this process are useful in the production of electrodes, in particular for rechargeable lithium batteries.Type: GrantFiled: November 27, 2001Date of Patent: March 28, 2006Assignee: Qinetiq LimitedInventors: Andrew G Ritchie, Peter G Bowles
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Patent number: 7018605Abstract: A method of sulfidation removal of zinc using hydrogen sulfide is provided, desirably at a temperature at 60° C. or lower, wherein in a container that is pressurized at 0.1 MPa or less with respect to atmospheric pressure, by making the pH of the solution 1.5 to 4.0, and the concentration of hydrogen sulfide in gas 2 volume % or greater in equilibrium with the hydrogen sulfide dissolved in the solution, the zinc in solution is removed by sulfidation to 1 mg/liter or less.Type: GrantFiled: February 24, 2003Date of Patent: March 28, 2006Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Hiroshi Kobayashi, Yoshitomo Ozaki, Masaki Imamura
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Patent number: 7019189Abstract: The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds. The invention also provides borosilicate glass compositions for use in immobilizing radioactive and/or hazardous waste.Type: GrantFiled: February 23, 2005Date of Patent: March 28, 2006Assignee: Geomatrix Solutions, Inc.Inventors: Anatoly Chekhmir, Arthur Gribetz
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Patent number: 7011805Abstract: The production of tetrabasic lead sulfate by means of solid state reactions at high temperatures allow the formation of powders having a particle size of less than 10 ?m. In the methods the chemical reaction that takes place between lead oxide and different sulfated compounds occurs in a single high temperature treatment. The sulfated compounds used in the present invention to produce the tetrabasic lead sulfate are: PbSO4, 3PbO.PbSO4.H2O, H2SO4 and (NH4)2SO4. There are lead-acid battery pastes produced using the tetrabasic lead sulfate made, the lead-acid battery plates made with the pastes, and the lead-acid batteries subsequently made with the plates.Type: GrantFiled: March 19, 2004Date of Patent: March 14, 2006Assignee: GES Technologies IP GmbHInventors: Ricardo Flores-Lira, Sanjuana Garza-De La Garza
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Patent number: 7011806Abstract: A process and a device for producing anhydrous alkali sulfide, wherein an alkali sulfide solution, alkali sulfide suspension, alkali sulfide dispersion or alkali water of crystallization melt is dried by spray drying with inert drying gas loaded with water vapor.Type: GrantFiled: November 14, 2003Date of Patent: March 14, 2006Assignee: Degussa AGInventors: Hans Christian Alt, Andreas Gölz, Alfred Alig