Patents Examined by William G. Wright
  • Patent number: 6887822
    Abstract: A method for making a silica supported catalyst involves impregnating a silica component with a catalytic metal using an aqueous, alkaline bath before drying. More specifically, the method involves forming and washing a silica component, such as a silica gel or a co-gel, for example a silica-zirconia co-gel. Then, the washed silica component is contacted with the alkaline bath to effect the impregnation with the catalytic metal, such as cesium, to form an activated silica component. Subsequently, the activated silica component is dried to form the catalyst. The resulting catalysts demonstrate good mechanical strength.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: May 3, 2005
    Assignee: PQ Corporation
    Inventor: Yatao Hu
  • Patent number: 6878667
    Abstract: A nickel-rhodium alloy based catalyst for catalyzing the production of synthesis gas from a light hydrocarbon and O2 by a net catalytic partial oxidation process is disclosed. Preferred nickel-rhodium alloy based catalysts comprise about 1-50 weight percent nickel and about 0.01-10 weight percent rhodium on a porous refractory support structure. In certain embodiments, the catalyst also contains a lanthanide element, zirconium, cobalt, manganese or magnesium.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: April 12, 2005
    Assignee: ConocoPhillips Company
    Inventors: Anne M. Gaffney, David R. Corbin
  • Patent number: 6864214
    Abstract: To provide an exhaust gas purifying catalyst that requires a smallest possible quantity of rhodium for developing the activity effectively, so as to produce an excellent purifying performance economically, a zirconium complex oxide on which rhodium and platinum are previously supported, and a cerium complex oxide on which platinum and/or palladium are previously supported are contained in an exhaust gas purifying catalyst.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: March 8, 2005
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Mari Uenishi, Isao Tan, Hirohisa Tanaka
  • Patent number: 6861039
    Abstract: The present invention provides a purification method of phosphoric acid, which includes bringing phosphoric acid containing arsenic into contact with hydrogen halide, thereby to remove the arsenic from the phosphoric acid, and a purification method of phosphoric acid, which includes bringing phosphoric acid containing arsenic into contact with hydrogen halide in the presence of a compound capable of generating hydrogen halide under acidic conditions. According to the method for purifying phosphoric acid of the present invention, a completely new method for removing arsenic in phosphoric acid is provided, which does not require a filtration or deaeration step or shows a great amount of residual sodium, unlike a sulfide coagulation method. This method is applicable to high concentration phosphoric acid, particularly polyphosphoric acid, and can be practiced at a low cost.
    Type: Grant
    Filed: December 24, 1999
    Date of Patent: March 1, 2005
    Assignee: Toyo Boeski Kabushiki Kaisha
    Inventors: Kiyoshi Hotta, Fuyuhiko Kubota
  • Patent number: 6852665
    Abstract: A composite oxide includes agglomerated particles which have an average particle diameter of 20 ?m or less, which are composed of a plurality of metallic element oxides being in form of fine particles having an average diameter of 50 nm or less, and which have a surface and an inner portion whose metallic element distributions differ with each other. The characteristics of the respective metallic elements are exhibited maximally. Hence, it is extremely useful as a support for an exhaust gas purifying catalyst. The catalyst exhibits the activities which degrade less even after it is subjected to a sever durability, is good in terms of the heat and sulfur-poisoning resistance, and can efficiently purify the harmful components in exhaust gases. Moreover, it is possible to produce such a composite oxide and catalyst easily and stably by production processes disclosed herein.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: February 8, 2005
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Akira Morikawa, Miho Hatanaka, Haruo Imagawa, Akihiko Suda, Naoki Takahashi
  • Patent number: 6849571
    Abstract: A catalyst (5) for selectively oxidizing carbon monoxide, wherein a noble metal (3) and an active oxygen supply material (4) capable of oxidizing carbon monoxide are supported on a substrate (6). Favorable selective oxidation of carbon monoxide can be obtained by setting the distance between the noble metal (3) and the active oxygen supply material (4) such that the noble metal (3) is close enough to accept active oxygen from the active oxygen supply material (4), and preferably within 0.1 mm. This catalyst (5) for selectively oxidizing carbon monoxide is effective at removing carbon monoxide from a reformate gas whose main component is hydrogen and which is supplied to a fuel cell.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: February 1, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Maki Hoshino, Hiroaki Kaneko
  • Patent number: 6846772
    Abstract: Production of nickel/silica hydrogenation catalyst precursors by heating a slurry of particulate silica, e.g. kieselguhr, in an aqueous nickel ammine carbonate solution for a total period of at least 200 minutes at a pH above 7.5, followed by filtration, washing, drying, and optionally calcination.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: January 25, 2005
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Cornelis Martinus Lok, Gavin Gray, Stephen Derek Rogers, Stephen Bailey
  • Patent number: 6811758
    Abstract: The present invention relates to a process for inducing homogeneous precipitation of a metal oxide, wherein said metal is capable of existing in at least two cationic oxidation states, which process comprises the steps of: i) providing an aqueous solution of a metal in a lower cationic oxidation state; and ii) adding an oxidant capable of oxidising said metal to a higher cationic oxidation state under conditions such that the mixing of said aqueous solution and said oxidant is substantially complete before precipitation of an oxide of said metal in its higher oxidation state occurs.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: November 2, 2004
    Assignee: European Community, Represented by the Commision of the European Communities
    Inventors: Stephen Pickering, Boro Djuricic
  • Patent number: 6808694
    Abstract: A NOx reduction method includes treating a first gas containing NOx, producing a second gas containing NO2, reducing a portion of the NO2 in the second gas to N2, and producing a third gas containing less NOx than the first gas, substantially all of the third gas NOx being NO. The method also includes treating the third gas, producing a fourth gas containing NO2, reducing a portion of the NO2 in the fourth gas to N2, and producing a fifth gas containing less NOx than the third gas, substantially all of the fifth gas NOx being NO. Treating the first and/or third gas can include treatment with a plasma. Reducing a portion of the NO2 in the second and/or fourth gas can include reducing with a catalyst. The method can further include controlling energy consumption of the plasmas independent of each other.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: October 26, 2004
    Assignee: Battelle Memorial Institute
    Inventors: Russell G. Tonkyn, Stephan E. Barlow, M. Lou Balmer, Gary D. Maupin
  • Patent number: 6809061
    Abstract: A novel catalyst and the use thereof in a reforming process are disclosed. The catalyst comprises a refractory inorganic oxide, uniform platinum-group metal, uniform Group IVA (IUPAC 14) metal and surface-layer lanthanide-series metal. The catalyst is particularly suitable for the reforming of a hydrocarbon feedstock to obtain an aromatics-rich product.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: October 26, 2004
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, Maureen L. Bricker
  • Patent number: 6803341
    Abstract: The present invention is provided a method of a high stability selectable hydrogenate catalyst producing and using for MCHD manufacturing. The present invention comprised a preparing procedure for Ru/Al2O3 catalyst including an activity raising procedure for said catalyst including and a DMCHD manufacturing process which said high stability catalyst is used for a selectable hydrogenating reaction.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: October 12, 2004
    Assignee: Chinese Petroleum Corporation
    Inventors: Man-Yin Lo, Mei-Yuan Chang
  • Patent number: 6787497
    Abstract: The invention concerns a catalyst carrier comprising a fibre paper impregnated with a slurry comprising silica sol, micro fibres and a filler, wherein said micro fibres have an equivalent average particle size, measured with sedigraph method, from about 200 nm to about 30000 nm and said filler has an average equivalent particle size, measured with sedigraph method, from about 300 to about 10000 nm. The invention further concerns a method of its preparation, a slurry useful therefore, a catalyst comprising such a catalyst carrier and use of the catalyst.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: September 7, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Anna-Carin Dellve, Bozena Tokarz, Mats Nyström
  • Patent number: 6780206
    Abstract: A process for the continuous preparation of very highly concentrated hydrogen peroxide having a content of greater than 80 wt.%, especially over 98 wt.%, by suspension crystallization and after-treatment of the H2O2 crystals. The after-treatment takes the form of countercurrent washing in a hydraulic or mechanical washing column with a packed crystal bed. Hydrogen peroxide is disclosed having a concentration of from 99.9 to 100 wt.% and a content of TOC, nitrate, phosphate, nickel and tin of in each case less than 4 mg/l.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: August 24, 2004
    Assignee: Degussa AG
    Inventors: Stefan Nordhoff, Matthias Creutz, Stefan Gross, Rudolf Wagner
  • Patent number: 6777452
    Abstract: Promoted skeletal iron catalysts are provided which contain 70-90 wt % iron together with promoters 0-5.0 wt. % copper, 0.1-10.0 wt. % manganese, and 0.1-3.0 wt. % potassium, with the balance being aluminum. The catalysts are prepared by mixing the metal chips or powders uniformly together, then melting and rapidly quenching the molten metals to form a solid metal alloy precursor including the promotor metals except potassium, removing most of the aluminum by caustic extraction/leaching to provide a base skeletal iron form, then loading the potassium promoter from a suitable potassium alcohol solution promoter. After evaporation of the solvent, the promoted skeletal iron catalyst is activated by contact with hydrogen. The promoted skeletal iron catalysts are utilized for F-T synthesis processes at 10-30 wt % catalyst concentration, 200-350° C. temperature, 1.0-3.0 Mpa pressure and gas hourly space velocity of 0.5-5.0 L/gcat-h to produce desired hydrocarbon liquid products.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: August 17, 2004
    Assignees: Hydrocarbon Technologies, Institue of Coal Chemistry
    Inventors: Peizheng Zhou, Yijun Lu
  • Patent number: 6774080
    Abstract: A gas treatment device, comprises a substrate disposed within a shell. The substrate comprises a catalyst composition comprising a support, a catalyst, and a sufficient amount of SMSI material such that, upon exposure to a gas stream (at a gas treatment device operating temperature), less than or equal to about 35 wt % of hydrocarbons in the gas stream are burned. A method for forming a gas treatment device, comprises applying a slurry to a substrate, wherein the slurry comprises a support and a sufficient amount of SMSI material such that, upon exposure to a gas stream at a gas treatment device operating temperature, greater than or equal to about 50 wt % of hydrocarbons in the gas stream are cracked to a light fraction; applying a catalyst to the substrate; calcining the catalyst; and disposing the calcined substrate into a shell, with a retention material disposed between the shell and the calcined substrate.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: August 10, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: William J. LaBarge, Richard F. Beckmeyer, Joachim Kupe
  • Patent number: 6762147
    Abstract: Composite oxide powder has a large specific surface area and a large pore volume even after a high-temperature durability test, without losing oxygen storage ability of a single metal oxide. In this composite oxide powder, a first metal oxide having oxygen storage ability is held as ultrafine particles in the form of islands by a second metal oxide which is different from the first metal oxide, pore volume is not less than 2 cc/g and the first metal oxide particles have a diameter of not more than 30 nm even after subjected to high temperature of 900° C. or more. Since the first metal oxide particles are held in the form of islands by the second metal oxide particles, separated from each other and suppressed from contacting each other, the first metal oxide particles hardly grow granularly.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: July 13, 2004
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Akira Morikawa, Takao Tani, Miho Hatanaka, Akihiko Suda
  • Patent number: 6756028
    Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: June 29, 2004
    Assignee: Degussa AG
    Inventors: Peter Korl, Bernhard Maurer
  • Patent number: 6756338
    Abstract: A process and composition for converting nitrogen oxides present in exhaust gases produced by an internal combustion engine utilize cobalt and at least one alkali metal or alkaline earth metal as a component of an adsorbent. The process involves contacting the exhaust gas with an adsorbent which adsorbs the nitrogen oxides in lean-burn conditions and recurrently reducing the oxygen concentration of the exhaust gas. During such periods of reduced oxygen concentration, the nitrogen oxides are then desorbed and reduced to nitrogen, thereby reducing the concentration of the nitrogen oxides in the exhaust gas. The composition of the adsorbent comprises an oxide support and at least two components loaded on the support and containing cobalt and at least one alkali metal or alkaline earth metal. The composition demonstrates improved activity at higher temperatures and improved thermal stability.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: June 29, 2004
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Kwangmo Koo, Paul Joseph Andersen
  • Patent number: 6740301
    Abstract: 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 molten sulphur. Lithium transition metal sulphides obtained using this process are also claimed and are useful in the production of electrodes, in particular for rechargeable lithium batteries.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: May 25, 2004
    Assignee: QinetiQ Limited
    Inventors: Andrew G Ritchie, Peter G Bowles
  • Patent number: 6737031
    Abstract: The method of simultaneously reducing carbon dioxide (CO2) emissions and sulfur dioxide (SO2) emissions produced by the combustion of carbon-containing matter in a hearth consists in injecting into the hearth a calcium-based agent, a fraction of which absorbs SO2 after decarbonization, and then, after the flue gases have been subjected to intermediate cooling, in causing them to transit via a first reactor and in putting them in contact therein with the other fraction of the absorbant that has not reacted with SO2 so as to capture CO2 from the flue gases by carbonization, then, in a separator, in extracting the solids contained in the flue gases output from the first reactor so as to subject them to heat treatment in a second reactor in order to extract CO2 therefrom by decarbonization and in order to recycle the resulting regenerated CO2 absorbant to the first reactor.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: May 18, 2004
    Assignee: Alstom Power NV
    Inventors: Corinne Beal, Jean-Xavier Morin, Michel Vandycke