Patents by Inventor Hideo Okado
Hideo Okado 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: 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: 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
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Patent number: 5354936Abstract: A method for preparing ethane and ethylene by reacting methane or a methane-containing natural gas in the presence of oxygen or an oxygen-containing gas, i.e., by partially oxidizing, at a temperature of 500.degree. through 1000.degree. C. using shellfishes or shells as a catalyst is disclosed. The oxidation coupling reaction of methane is controlled so as to remarkably increase the conversion ratio of methane and the selectivity of C.sub.2.sup.+ compounds. The waste matter abundantly released from food industries as well as easily accessible natural resources is used as a raw material of a catalyst for the reaction. The present method is extremely useful from the viewpoint of the recycling of waste as well.Type: GrantFiled: March 26, 1993Date of Patent: October 11, 1994Assignee: Sekiyushigen Kaihatsu Kabushiki KaishaInventors: Masami Yamamura, Hideo Okado, Naohide Tsuzuki, Kazutoshi Chaki, Toshiya Wakatsuki
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Patent number: 4926006Abstract: The aluminoborosilicate containing an alkaline earth metal element, e.g. calcium, characterized by the chemical composition and the X-ray diffraction pattern is prepared by the hydrothermal reaction of a reaction mixture containing the source materials of boron and the alkaline earth in a similar procedure to that for the preparation of ZSM-5 type zeolites. Different from the conventional ZSM-5 zeolites into which calcium ions are introduced by ion exchange, the calcium ions in the inventive aluminoborosilicate are not replaceable by ion exchange with protons or alkali metal ions. The aluminoborosilicate of the invention after conversion into the hydrogen form is an excellent catalyst for the conversion of methyl alcohol or dimethyl ether into lower olefins such as ethylene and propylene in respect of the selectivity and durability of the catalytic activity with remarkably decreased deposition of carbonaceous materials.Type: GrantFiled: July 19, 1988Date of Patent: May 15, 1990Assignee: Director General of Agency of Industrial Science and TechnologyInventors: Kichinari Kawamura, Yasuo Kono, Hideo Okado, Shigemitsu Shin, Haruo Takaya
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Patent number: 4767886Abstract: Here is disclosed a method for preparing lower olefins by bringing methanol and/or dimethyl ether into contact with a catalyst in a gaseous phase. In this method, the contact between the methanol and/or dimethyl ether and the catalyst is carried out at a weight hourly space velocity of 0.1 to 20 hr.sup.-1 at a reaction temperature of 300.degree. to 650.degree. C. under a total pressure of 0.1 to 100 atm by the use of, as the catalyst, an alkaline earth metal-modified alkaline earth metal-containing zeolite catalyst; the alkaline earth metal-modified alkaline earth metal-containing zeolite catalyst being prepared as disclosed in the Specification by modifying an alkaline earth metal-containing aluminoborosilicate so that the alkaline earth metal in an amount of at least 0.25% by weight in terms of the metal may be mixed with or supported in the zeolite catalyst.Type: GrantFiled: March 5, 1987Date of Patent: August 30, 1988Assignee: Director-General of Agency of Industrial Science and TechnologyInventors: Kichinari Kawamura, Yasuo Kono, Hideo Okado, Hiroyuki Hagiwara, Haruo Takaya
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Patent number: 4636482Abstract: A zeolite material obtained by modifying a crystalline aluminosilicate having the following empirical formula:xM.sub.2 O.yM'O.Al.sub.2 O.sub.3.zSiO.sub.2.nH.sub.2 Owherein M is an exchangeable cation selected from the group consisting of alkali metals, hydrogen and mixtures thereof, M' is an alkaline earth metal, x is between 0 and 1.5, y is between 0.2 and 40, z is between 50 and 3000 and n is between 0 and 40 and wherein x+y is at least 1.2, with an alkaline earth metal compound. The modifying may be by impregnation or by mere mixing. The zeolite material is useful as catalyst for converting methanol and/or dimethyl ether into lower olefins.Type: GrantFiled: May 20, 1985Date of Patent: January 13, 1987Assignee: Director-General of Agency of Industrial Science & TechnologyInventors: Hideo Okado, Hiroshi Shoji, Haruo Takaya, Kichinari Kawamura, Yasuyoshi Yamazaki
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Patent number: 4579994Abstract: A process for preparing lower olefin using a calcium phosphate modified zeolite type catalyst is disclosed which is capable of reducing the decomposition of methanol into CO and CO.sub.2 and increasing the olefin selectivity. In the process, the reaction of methanol and/or dimethyl ether is carried out in the presence of an aluminosilicate zeolite-type catalyst which has a Ca-containing compound and a P-containing compound contained therein in predetermined amounts.Type: GrantFiled: February 28, 1985Date of Patent: April 1, 1986Assignee: Itaru TodorikiInventors: Yoshimichi Kiyozumi, Kunio Suzuki, Shigemitsu Shin, Hideo Okado, Kazumi Noguchi
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Patent number: 4544793Abstract: A crystalline aluminosilicate having the following empirical formula:xM.sub.2 O.yM'O.Al.sub.2 O.sub.3.zSiO.sub.2.nH.sub.2 Owherein M is an exchangeable cation selected from the group consisting of alkali metals, hydrogen and mixtures thereof, M' is an alkaline earth metal, x is between 0 and 1.5, y is between 0.2 and 40, z is between 12 and 3000 and n is between 0 and 40 and wherein x+y is 1.2 or more, said aluminosilicate having the X-ray diffraction lines of Table 1 of the specification. The crystalline aluminosilicate material is obtained by providing a reaction mixture containing water, a tetrapropylammonium compound and a source of an alkali metal oxide, an oxide of silicon, an oxide of aluminum and an oxide of an alkaline earth metal and having a composition falling within the following ranges:SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio: 12-3000OH.sup.- /SiO.sub.2 molar ratio: 0.02-10H.sub.2 O/SiO.sub.2 molar ratio: 1-1000tetrapropylammonium ion/SiO.sub.2 molar ratio: 0.Type: GrantFiled: November 18, 1983Date of Patent: October 1, 1985Assignee: Director-General of Agency of Industrial Science and TechnologyInventors: Hideo Okado, Kazuo Hashimoto, Kichinari Kawamura, Yasuyoshi Yamazaki, Haruo Takaya