Patents Assigned to Catalyst Technology, Inc.
  • Publication number: 20080010972
    Abstract: Provided is a method for extending a temperature range enabling combustion of high concentration hydrocarbon, or for rapidly supplying high temperature gas to a later stage catalyst. Provided is a method for purification of exhaust gas from an internal-combustion engine comprised by: providing a temperature-raising catalyst for exhaust gas from an internal-combustion engine in an exhaust gas passage of the internal-combustion engine, along flow of said exhaust gas, at the upstream side of a purification catalyst for said exhaust gas; and introducing hydrocarbon in an amount of 1,000 to 40,000 ppm, as converted to methane, from the upstream side of the temperature-raising catalyst, wherein said temperature-raising catalyst has catalytically active components supported onto a refractory three-dimensional structure, wherein concentration of said components has a gradient such that said concentration gradually becomes lower from the inflow side toward the outflow side of said exhaust gas.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 17, 2008
    Applicants: ICT CO., LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventor: Masanori Ikeda
  • Publication number: 20070219089
    Abstract: It is an object of the present invention to provide a catalyst for the exhaust gas purification having excellent ignition performance and NOx purification performance. The present invention provides a catalyst for the exhaust gas purification which comprises a catalytically active component (I) having palladium and barium supported on a refractory inorganic oxide (A); and a catalytically active component (II) having at least either of rhodium and platinum on a refractory inorganic oxide (B), a method for the production thereof, and a method for purifying an exhaust gas using such a catalyst.
    Type: Application
    Filed: March 14, 2007
    Publication date: September 20, 2007
    Applicants: ICT CO, LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventor: Hideki GOTO
  • Patent number: 7265073
    Abstract: An exhaust gas purifying catalyst formed by having a first rhodium-containing catalyst layer, a second zeolite-containing catalyst layer, and a third palladium-containing catalyst layer superposed sequentially on a carrier, and a process for purifying the exhaust gas from an internal combustion engine by using the catalyst. A catalyst possessing durability and excelling in the ability to adsorb hydrocarbon, the ability to purify, and the three-way performance is provided.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: September 4, 2007
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventor: Tatsuya Yoshikawa
  • Patent number: 7160839
    Abstract: A catalyst for purifying NOx is provided which efficiently decomposes and purify the NOx in an exhaust gas in an oxygen-excess atmosphere, excels in resistance to heat and in durability in a high temperature range under a high-temperature oxidizing atmosphere and in the presence of moisture and SOx, and manifests the catalytic activity over a wide range of temperature. It is a catalyst for purifying nitrogen oxides formed by coating (A) a catalytically active component comprising (A-a) iridium and (A-b) at least one element selected from the group consisting of the elements of Group IIIA and Group IVA in the Periodic Table of the Elements with (B) a refractory inorganic compound.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: January 9, 2007
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Hideki Goto, Shigeyoshi Taniguchi, Makoto Horiuchi
  • Patent number: 7141526
    Abstract: An exhaust gas purifying catalyst characterized by having zeolite subjected to ion exchange with cerium and deposited on cerium oxide as well and containing platinum and/or palladium, and a process for purifying the exhaust gas using the catalyst. The catalyst, by using zeolite and a noble metal, is enabled to acquire improved durability.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: November 28, 2006
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventor: Tatsuya Yoshikawa
  • Publication number: 20060073960
    Abstract: An exhaust gas purifying catalyst contains copper oxide, ZSM-5 and/orzeolitep, and an oxide of magnesium and/or calcium is further added thereto. A process for purifying an exhaust gas using such a catalyst is also included. By using the catalyst, NOx in an exhaust gas containing much oxygen such as exhaust gas of diesel engines can be efficiently removed and oxidation of SO2 under high-temperature conditions can be suppressed.
    Type: Application
    Filed: November 18, 2003
    Publication date: April 6, 2006
    Applicants: ICT CO., LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventors: Takeshi Matsumoto, Takao Kobayashi, Takuji Nakane, Takahiro Uno, Makoto Horiuchi
  • Publication number: 20050172614
    Abstract: A three-way catalyst (30) comprises a microporous catalyst element (30a) having a micropore group whose average pore opening size is smaller than molecular size of HC in a washcoat and a macroporous catalyst element (30b) having a macropore group whose average pore opening size is larger than the molecular size of HC in a washcoat.
    Type: Application
    Filed: January 6, 2005
    Publication date: August 11, 2005
    Applicants: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, ICT CO., LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventors: Yasuki Tamura, Keisuke Tashiro, Akihisa Okumura
  • Patent number: 6893997
    Abstract: An exhaust gas purifying catalyst including a catalyst component containing a refractory inorganic oxide carrying a platinum family metal, a nitrogen oxide adsorbent, and a hydrocarbon adsorbent and a catalyst component for the purification of nitrogen oxide and a method for the purification of an exhaust gas by the use of the catalyst.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: May 17, 2005
    Assignees: CT Co., Ltd., International Catalyst Technology Inc.
    Inventors: Takeshi Matsumoto, Makoto Horiuchi, Tatsuya Yoshikawa
  • Publication number: 20040209760
    Abstract: An exhaust gas purifying catalyst characterized by having zeolite subjected to ion exchange with cerium and deposited on cerium oxide as well and containing platinum and/or palladium, and a process for purifying the exhaust gas using the catalyst. The catalyst, by using zeolite and a noble metal, is enabled to acquire improved durability.
    Type: Application
    Filed: April 15, 2004
    Publication date: October 21, 2004
    Applicants: ICT CO., LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventor: Tatsuya Yoshikawa
  • Publication number: 20040209761
    Abstract: An exhaust gas purifying catalyst formed by having a first rhodium-containing catalyst layer, a second zeolite-containing catalyst layer, and a third palladium-containing catalyst layer superposed sequentially on a carrier, and a process for purifying the exhaust gas from an internal combustion engine by using the catalyst. A catalyst possessing durability and excelling in the ability to adsorb hydrocarbon, the ability to purify, and the three-way performance is provided.
    Type: Application
    Filed: April 15, 2004
    Publication date: October 21, 2004
    Applicants: ICT CO., LTD., INTERNATIONAL CATALYST TECHNOLOGY, INC.
    Inventor: Tatsuya Yoshikawa
  • Patent number: 6797668
    Abstract: A catalyst for purifying exhaust gases from internal combustion engines with high efficiencies of CO/NOx even under the conditions large A/F fluctuations. The catalyst includes a complex in which the oxides of cerium are deposited on a solid solution oxide containing Zr and Ce.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: September 28, 2004
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventor: Tatsuya Yoshikawa
  • Patent number: 6770251
    Abstract: A catalyst is provided that is capable of efficiently purifying NOx contained in a lean atmosphere containing moisture. The exhaust gas purifying catalyst contains a composition obtained by physically mixing a composite oxide containing zirconium and manganese and/or cobalt with a zeolite.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: August 3, 2004
    Assignees: ICT. Co., Ltd., International Catalyst Technology, Inc.
    Inventor: Tatsuya Yoshikawa
  • Patent number: 6656871
    Abstract: During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. In the deposition of the liquid substance on the carrier by the introduction of the liquid substance into the carrier from the bottom face thereof, the liquid level near the top face of the carrier is detected by an image-processing sensor.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: December 2, 2003
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc., Nippon Shokubai Co., Ltd.
    Inventors: Shigeyoshi Taniguchi, Katsuji Tanihira, Makoto Horiuchi, Ryugo Kakimi
  • Patent number: 6622382
    Abstract: A catalytically active component is deposited exclusively on a carrier component by utilizing a container-integrated carrier. Prior to the deposition of the active component on the carrier, the carrier is sealed and then the deposition of the active component is performed.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: September 23, 2003
    Assignees: Toyota Jidosha Kabushiki Kaisha, ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Nakaba Tamura, Shigeyoshi Taniguchi, Katsuji Tanihira, Makoto Horiuchi, Ryugo Kakimi
  • Patent number: 6602479
    Abstract: An exhaust gas purifying catalyst having a refractory three-dimensional structure coated with a catalytically active component comprising at least one kind of noble metals, a refractory inorganic oxide, and a zirconium oxide containing cerium and lanthanum, the crystal structure of the zirconium oxide containing cerium and lanthanum being a tetragonal structure of zirconium oxide.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: August 5, 2003
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Shigeyoshi Taniguchi, Makoto Horiuchi
  • Patent number: 6599857
    Abstract: During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. In the deposition of the liquid substance on the carrier by the introduction of the liquid substance into the carrier from the bottom face thereof, a water-detecting sensor detects the liquid level near the top face of the carrier.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: July 29, 2003
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc., Nippon Shokubai Co., Ltd.
    Inventors: Shigeyoshi Taniguchi, Makoto Horiuchi, Ryugo Kakimi
  • Patent number: 6555081
    Abstract: A catalyst for purifying the exhaust gas from a lean-burn engine, which includes a refractory inorganic oxide carrying platinum thereon, a cerium-containing oxide carrying palladium thereon, and an alkali metal compound and/or an alkaline earth metal compound, and a method for the production of the catalyst.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: April 29, 2003
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Masao Hori, Makoto Horiuchi
  • Patent number: 6287527
    Abstract: Exhaust emission control catalysts capable of efficiently removing nitrogen oxide in exhaust containing a large amount of oxygen emitted from a diesel engine and the like and reducing the generation of particulate matter in the exhaust under high temperature conditions, and a method for controlling the emission of exhaust using the exhaust emission control catalysts. The exhaust emission control catalysts contain copper, praseodymium, and yttrium. The method for controlling the emission of exhaust purifies exhaust containing hydrocarbon and nitrogen oxide in a mole ratio (hydrocarbon/nitrogen oxide) within a range of 0.5 to 30 by bringing the exhaust into contact with the exhaust emission control catalysts. It is possible to efficiently remove nitrogen oxide in the exhaust by reduction while suppressing the oxidation of sulfur dioxide in the exhaust.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: September 11, 2001
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Makoto Kawanami, Makoto Horiuchi
  • Patent number: 6245307
    Abstract: A catalyst for the purification of an exhaust gas emitting from a lean burn engine using gasoline as a fuel thereof and a method for the purification are provided. The catalyst has deposited on an inert carrier a mixture of a catalytically active component comprising palladium, an oxide of at least one alkali metal selected from the group consisting of potassium, sodium, rubidium, and cesium, and an oxide of at least one iron family metal selected from the group consisting of cobalt, nickel, and iron with a refractory inorganic oxide. This catalyst is used either alone or in combination with an oxidizing catalyst or a three-way catalyst for the purification of the exhaust gas from the lean burn engine using gasoline as a fuel thereof.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: June 12, 2001
    Assignees: ICT Co., Ltd., International Catalyst Technology, Inc.
    Inventors: Satoshi Inui, Masao Hori, Kazuo Tsuchitani
  • Patent number: 6193942
    Abstract: A catalyst which is capable of decomposing and allaying particularly NOx among other harmful components in the diesel engine exhaust gas and, at the same time, depriving by combustion the exhaust gas of carbonaceous particulates, unburned hydrocarbons, and carbon monoxide and a method for purifying the diesel engine exhaust gas by the use of this catalyst are provided. The catalyst for the decomposition of the nitrogen oxides has a refractory three-dimensional structure coated with a copper-containing zirconia powder having deposited copper and the catalytically active oxide of at least one metal selected from the group consisting of tungsten, gallium, nickel, manganese, iron, and cobalt on a zirconia powder. The method for purifying the diesel engine exhaust gas uses the catalyst.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: February 27, 2001
    Assignees: ICT Co., Ltd, International Catalyst Technology, Inc.
    Inventors: Norimasa Okuda, Makoto Horiuchi