Patents by Inventor Kiyoshi Inaba
Kiyoshi Inaba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8057744Abstract: According to an exemplary embodiment, a bubble column-type slurry bed Fischer-Tropsch synthesis reaction process can be provided, in which synthesis gas supplied continuously from the bottom of a reactor contacts suspended catalyst particles to form liquid hydrocarbons, gaseous hydrocarbons and water. Additionally, a slurry of suspended liquid products and catalyst particles can move from the reactor to the lower portion of a separation vessel to separate the catalyst particles and gaseous products. Further, a process can be provided in which the liquid products formed are sent to the separation vessel a process in which liquid products can be derived. Additionally, a process can be provided in which a slurry in which catalyst particles are concentrated is derived from the bottom of the separation vessel and circulated to the bottom of the reactor, are driven by the driving force of synthesis gas without using an external drive power source.Type: GrantFiled: December 14, 2005Date of Patent: November 15, 2011Assignees: Nippon Steel Engineering Co., Ltd., Japan Oil, Gas and Metals National Corporation, Sekiyushigen Kaihatsu Kabushiki Kaisha, Cosmo Oil Co., Ltd., Inpex CorporationInventors: Yasuhiro Onishi, Kenichiro Fujimoto, Masaru Ihara, Yoshifumi Suehiro, Yasumasa Morita, Kiyoshi Inaba, Toshio Shimizu, Osamu Iwamoto
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Publication number: 20090220389Abstract: A bubble column-type slurry bed reaction system is provided in which an operating system, which synthesizes liquid hydrocarbons by the Fischer-Tropsch (FT) synthesis reaction and separates and derives a catalyst and liquid hydrocarbon products from a slurry composed of gas, liquid and solid phases, can be simplified, and deterioration of catalyst particles caused by attrition and so forth can be reduced.Type: ApplicationFiled: December 14, 2005Publication date: September 3, 2009Applicants: NIPPON STEEL ENGINEERING CO., LTD., SEKIYUSHIGEN KAIHATSU KABUSHIKI KAISHAInventors: Yasuhiro Onishi, Kenichiro Fujimoto, Masaru Ihara, Yoshifumi Suehiro, Yasumasa Morita, Kiyoshi Inaba, Toshio Shimizu, Osamu Iwamoto
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Patent number: 7452842Abstract: A porous preform (carrier) is soaked in an impregnating solution, which contains both of a catalytic-activity constituent, e.g. Ni and/or Co, and a carrier-forming constituent, e.g. Mg, Al, Zr, Ti and/or Ca, so as to simultaneously infiltrate the catalytic-activity and carrier-forming constituents into the porous preform. The impregnated preform is dried, calcined at a temperature of 700° C. or higher and then activated at a temperature of 500° C. or higher, whereby fine catalytic-activity particles are distributed on a surface of the porous carrier with high dispersion. Due to finely-distributed catalytic-activity particles, the surface of the catalyst is prevented from deposition of carbonaceous matters during reformation of hydrocarbon and held in an active state over a long term.Type: GrantFiled: October 3, 2003Date of Patent: November 18, 2008Assignee: Japan Oil, Gas and Metals National CorporationInventors: Toshiya Wakatsuki, Kiyoshi Inaba, Hideyuki Nakajima, Eiichi Hosoya
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Patent number: 7393470Abstract: Synthesis gas for FT synthesis is produced using a producing apparatus including an active carbon adsorbing vessel for adsorbing impurities in a natural gas, a hydro-desulfurizer for hydrogenating and desulfurizing sulfur content in the natural gas under a condition of a partial pressure of hydrogen of 100 to 200 kPa, a second hydrogen supplying line for supplying hydrogen to the natural gas between the hydro-desulfurizer and a reactor, the reactor for obtaining synthesis gas by reacting the natural gas, carbon dioxide and steam in the presence of a catalyst for reforming, and a heat recovering boiler for cooling the synthesis gas at a cooling rate of 2000 to 4000° C./second.Type: GrantFiled: March 25, 2005Date of Patent: July 1, 2008Assignees: Japan Oil, Gas and Metals National Corporation, Sekiyushigen Kamatsu Kabushiki Kaisha, Cosmo Oil Co. Ltd., Chiyoda Corporation, Nippon Steel Corporation, Inpex CorporationInventors: Masaru Ihara, Yoshifumi Suehiro, Yasumasa Morita, Kiyoshi Inaba, Toshio Shimizu, Osamu Iwamoto, Tomoyuki Mikuriya, Ryuichiro Kajiyama, Ken-ichiro Fujimoto, Yasuhiro Onishi
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Publication number: 20050220703Abstract: Synthesis gas for FT synthesis is produced using a producing apparatus including an active carbon adsorbing vessel for adsorbing impurities in a natural gas, a hydro-desulfurizer for hydrogenating and desulfurizing sulfur content in the natural gas under a condition of a partial pressure of hydrogen of 100 to 200 kPa, a second hydrogen supplying line for supplying hydrogen to the natural gas between the hydro-desulfurizer and a reactor, the reactor for obtaining synthesis gas by reacting the natural gas, carbon dioxide and steam in the presence of a catalyst for reforming, and a heat recovering boiler for cooling the synthesis gas at a cooling rate of 2000 to 4000° C./second.Type: ApplicationFiled: March 25, 2005Publication date: October 6, 2005Inventors: Masaru Ihara, Yoshifumi Suehiro, Yasumasa Morita, Kiyoshi Inaba, Toshio Shimizu, Osamu Iwamoto, Tomoyuki Mikuriya, Ryuichiro Kajiyama, Ken-ichiro Fujimoto, Yasuhiro Onishi
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Patent number: 6726853Abstract: The present invention relates to a catalyst for reforming that is employed when preparing a synthetic gas by reacting hydrocarbon such as methane with a reforming agent such as water, carbon dioxide, oxygen, air or the like. The present invention further relates to a process for producing a synthetic gas employing this catalyst for reforming. By employing the catalyst for reforming that is a mixed oxide having the composition expressed by the following formula in which the M and Co are in a highly dispersed state, it is possible to suppress precipitation of carbonaceous matters (carbon) when producing the synthetic gas. aM.bCo.cMg.dCa.eO (Where, a, b, c, d, and e are molar fractions, a+b+c+d=1, 0.0001≦a≦0.10, 0.0001≦b≦0.20, 0.70≦(c+d)≦0.9998, 0<c≦0.9998, 0≦d<0.9998, e=the number of oxygen necessary to maintain an electric charge balance with metallic elements.Type: GrantFiled: May 21, 2002Date of Patent: April 27, 2004Assignee: Sekiyushigen Kaihatsu Kabushiki KaishaInventors: Hideo Okado, Toshiya Wakatsuki, Kiyoshi Inaba, Hitomi Hirano
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Publication number: 20040067848Abstract: A porous preform (carrier) is soaked in an impregnating solution, which contains both of a catalytic-activity constituent, e.g. Ni and/or Co, and a carrier-forming constituent, e.g. Mg, Al, Zr, Ti and/or Ca, so as to simultaneously infiltrate the catalytic-activity and carrier-forming constituents into the porous preform. The impregnated preform is dried, calcined at a temperature of 700° C. or higher and then activated at a temperature of 500° C. or higher, whereby fine catalytic-activity particles are distributed on a surface of the porous carrier with high dispersion. Due to finely-distributed catalytic-activity particles, the surface of the catalyst is prevented from deposition of carbonaceous matters during reformation of hydrocarbon and held in an active state over a long term.Type: ApplicationFiled: October 3, 2003Publication date: April 8, 2004Applicants: Japan National Oil Corporation, Japan Petroleum Exploration Co., Ltd.Inventors: Toshiya Wakatsuki, Kiyoshi Inaba, Hideyuki Nakajima, Eiichi Hosoya
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Publication number: 20020183402Abstract: The present invention relates to a catalyst for reforming that is employed when preparing a synthetic gas by reacting hydrocarbon such as methane with a reforming agent such as water, carbon dioxide, oxygen, air or the like. The present invention further relates to a process for producing a synthetic gas employing this catalyst for reforming. By employing the catalyst for reforming that is a mixed oxide having the composition expressed by the following formula in which the M and Co are in a highly dispersed state, it is possible to suppress precipitation of carbonaceous matters (carbon) when producing the synthetic gas.Type: ApplicationFiled: May 21, 2002Publication date: December 5, 2002Inventors: Hideo Okado, Toshiya Wakatsuki, Kiyoshi Inaba, Hitomi Hirano
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Patent number: 6423665Abstract: The present invention relates to a catalyst for reforming that is employed when preparing a synthetic gas by reacting hydrocarbon such as methane with a reforming agent such as water, carbon dioxide, oxygen, air or the like. The present invention further relates to a process for producing a synthetic gas employing this catalyst for reforming. By employing the catalyst for reforming that is a mixed oxide having the composition expressed by the following formula in which the M and Co are in a highly dispersed state, it is possible to suppress precipitation of carbonaceous matters (carbon) when producing the synthetic gas. aM.bCo.cMg.dCa.eO (Where, a, b, c, d, and e are molar fractions, a+b+c+d=1, 0.0001≦a≦0.10, 0.0001≦b≦0.20, 0.70≦(c+d)≦0.9998, 0<c≦0.9998, 0≦d<0.9998, e=the number of oxygen necessary to maintain an electric charge balance with metallic elements.Type: GrantFiled: March 29, 2000Date of Patent: July 23, 2002Assignee: Sekiyushigen Kaihatsu Kabushiki KaishaInventors: Hideo Okado, Toshiya Wakatsuki, Kiyoshi Inaba, Hitomi Hirano