Patents by Inventor Yoshimi Shiroto
Yoshimi Shiroto 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: 6806296Abstract: A process for the production of a liquid hydrocarbon oil from a gas feed containing a lower hydrocarbon and CO2, wherein the gas feed is mixed with H2O to obtain a mixed gas having specific CO2, H2O and lower hydrocarbon contents. The mixed gas is contacted with a Rh, Ru/MgO catalyst having a specific surface area of 5 m2/g or less to produce a synthesis gas with a carbon conversion efficiency Cf of at least 50%. The thus obtained synthesis gas having a H2/CO molar ratio of 1.5-2.5 is reacted in the presence of a Fischer-Tropsch catalyst to obtain a liquid hydrocarbon oil, while the synthesis gas having a H2/CO molar ratio of 0.5-1.5 is reacted in the presence of one or more catalysts having methanol synthesizing, dehydrating and CO shift reaction activities to obtain dimethyl ether.Type: GrantFiled: August 28, 2003Date of Patent: October 19, 2004Assignee: Chiyoda CorporationInventors: Yoshimi Shiroto, Kenichi Kawazuishi, Masato Tauchi, Mitsunori Shimura
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Publication number: 20040048936Abstract: A process for the production of a liquid hydrocarbon oil from a gas feed containing a lower hydrocarbon and CO2, wherein the gas feed is mixed with H2O to obtain a mixed gas having specific CO2, H2O and lower hydrocarbon contents. The mixed gas is contacted with a Rh, Ru/MgO catalyst having a specific surface area of 5 m2/g or less to produce a synthesis gas with a carbon conversion efficiency Cf of at least 50%. The thus obtained synthesis gas having a H2/CO molar ratio of 1.5-2.5 is reacted in the presence of a Fischer-Tropsch catalyst to obtain a liquid hydrocarbon oil, while the synthesis gas having a H2/CO molar ratio of 0.5-1.5 is reacted in the presence of one or more catalysts having methanol synthesizing, dehydrating and CO shift reaction activities to obtain dimethyl ether.Type: ApplicationFiled: August 28, 2003Publication date: March 11, 2004Inventors: Yoshimi Shiroto, Kenichi Kawazuishi, Masato Tauchi, Mitsunori Shimura
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Patent number: 6656978Abstract: A process for the production of a liquid hydrocarbon oil from a gas feed containing a lower hydrocarbon and CO2, wherein the gas feed is mixed with H2O to obtain a mixed gas having specific CO2, H2O and lower hydrocarbon contents. The mixed gas is contacted with a Rh, Ru/MgO catalyst having a specific surface area of 5 m2/g or less to produce a synthesis gas with a carbon conversion efficiency Cf of at least 50%. The thus obtained synthesis gas having a H2/CO molar ratio of 1.5-2.5 is reacted in the presence of a Fischer-Tropsch catalyst to obtain a liquid hydrocarbon oil, while the synthesis gas having a H2/CO molar ratio of 0.5-1.5 is reacted in the presence of one or more catalysts having methanol synthesizing, dehydrating and CO shift reaction activities to obtain dimethyl ether.Type: GrantFiled: April 5, 2001Date of Patent: December 2, 2003Assignee: Chiyoda CorporationInventors: Yoshimi Shiroto, Kenichi Kawazuishi, Masato Tauchi, Mitsunori Shimura
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Patent number: 6652819Abstract: A process for the production of a vanadium compound from carbonaceous residues containing vanadium, which includes the steps of: (a) combusting the carbonaceous residues at a temperature of 500-690° C. in an oxygen-containing gas to form vanadium-containing combustion residues; (b) heating the vanadium-containing combustion residues at a temperature T in ° C. under an oxygen partial pressure of at most T in kPa wherein T and P meet with the following conditions: log10(P)=−3.45×10−3×T+2.21 500≦T≦1300 to obtain a solid product containing less than 5% by weight of carbon and vanadium at least 80% of which is tetravalent vanadium oxide; (c) selectively leach tetravalent vanadium ion with sulfuring acid at pH in the range of 1.5-4; (d) separating a liquid phase from the leached mixture; (e) adding an alkaline substance to the liquid phase to adjust the pH thereof in the range of 4.5-7.Type: GrantFiled: June 5, 2001Date of Patent: November 25, 2003Assignee: Chiyoda CorporationInventors: Yoshimi Shiroto, Ataru Wakabayashi
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Publication number: 20030036572Abstract: A process for the production of a liquid hydrocarbon oil from a gas feed containing a lower hydrocarbon and CO2, wherein the gas feed is mixed with H2O to obtain a mixed gas having specific CO2, H2O and lower hydrocarbon contents. The mixed gas is contacted with a Rh, Ru/MgO catalyst having a specific surface area of 5 m2/g or less to produce a synthesis gas with a carbon conversion efficiency Cf of at least 50%. The thus obtained synthesis gas having a H2/CO molar ratio of 1.5-2.5 is reacted in the presence of a Fischer-Tropsch catalyst to obtain a liquid hydrocarbon oil, while the synthesis gas having a H2/CO molar ratio of 0.5-1.5 is reacted in the presence of one or more catalysts having methanol synthesizing, dehydrating and CO shift reaction activities to obtain dimethyl ether.Type: ApplicationFiled: April 5, 2001Publication date: February 20, 2003Applicant: CHIYODA CORPORATIONInventors: Yoshimi Shiroto, Kenichi Kawazuishi, Masato Tauchi, Mitsunori Shimura
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Publication number: 20020112968Abstract: A process for the production of a vanadium compound from carbonaceous residues containing vanadium, which includes the steps of:Type: ApplicationFiled: June 5, 2001Publication date: August 22, 2002Applicant: CHIYODA CORPORATIONInventors: Yoshimi Shiroto, Ataru Wakabayashi
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Patent number: 5767303Abstract: A process for the production of a carbonic diester, wherein an alcohol is reacted in a reaction zone with carbon monoxide and oxygen in the presence of (a) metallic copper or a copper compound, (b) a heterocyclic compound containing one or more nitrogen atoms in the cyclic skeleton and (c) a glycol ether represented by the following formula (I):R.sup.1 O--(CHR.sup.2 --CH.sub.2 O).sub.n --R.sup.3 (I)wherein R.sup.1 stands for an alkyl group having from 1 to 6 carbon atoms, R.sup.2 stands for a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, R.sup.3 stands for a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms and n is an integer of from 1 to 12.Type: GrantFiled: June 16, 1997Date of Patent: June 16, 1998Assignee: Chiyoda CorporationInventors: Takeshi Minami, Noriyuki Yoneda, Yoshimi Shiroto, Haruto Kobayashi
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Patent number: 5576458Abstract: In the production step, alcohol is reacted with carbon monoxide in a reaction solvent in the presence of a rhodium-containing solid catalyst obtained by immobilizing rhodium in an insoluble carrier (I) containing a pyridine ring in its resin structure and an alkyl iodide containing an alkyl group of 1 to 5 carbon atoms, to produce a reaction product having a water content of 0.5 to 10% by weight; and in the subsequent removing step, an organic carboxylic acid is separated and recovered from the reaction product, and the recovered organic carboxylic acid is contacted with an insoluble carrier (II) containing a pyridine ring in its resin structure, to remove an iodide contained in the organic carboxylic acid.Type: GrantFiled: March 21, 1995Date of Patent: November 19, 1996Assignee: Chiyoda CorporationInventors: Takeshi Minami, Kazuhiko Hamato, Kenji Shimokawa, Yoshimi Shiroto
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Patent number: 5364963Abstract: A methanol carbonylation catalyst includes a rhodium complex supported on a porous, cross-linked vinylpyridine resin, wherein the vinylpyridine resin has a cross-linking degree of 30-60%, a pore volume of 0.1-0.4 ml/g and an average pore diameter of 20-100 nm. The catalyst may be prepared by contacting the pyridine ring-containing resin with an aqueous solution containing rhodium ion and then contacting the resulting rhodium ion-carrying resin with carbon monoxide and an alkyl iodide in an organic solvent to convert the rhodium ion to a rhodium complex bound to the resin. Acetic acid is produced by reacting carbon monoxide with methanol at a temperature of 140.degree.-250.degree. C. and a partial pressure of carbon monoxide of 7-30 kg/cm.sup.2 in the presence of an alkyl iodide and the above catalyst.Type: GrantFiled: December 20, 1993Date of Patent: November 15, 1994Assignee: Chiyoda CorporationInventors: Takeshi Minami, Kenji Shimokawa, Kazuhiko Hamato, Yoshimi Shiroto, Noriyuki Yoneda
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Patent number: 5334755Abstract: A liquid feed containing methanol, carbon monoxide, an alkyl iodide and a solvent is contacted with a supported rhodium catalyst to produce acetic acid at a temperature of 140.degree.-250.degree. C. and a pressure of 15-60 kg/cm.sup.2 G with a partial pressure of carbon monoxide of 7-30 kg/cm.sup.2 while maintaining (a) the water concentration of the product solution in the range of 0.5-10% by weight and (b) the carbonylation degree C.sub.r, defined in the specification, of the solution within the reactor at 0.15 or more. The solvent may be a carboxylic acid or a carboxylic acid ester.Type: GrantFiled: April 21, 1993Date of Patent: August 2, 1994Assignee: Chiyoda CorporationInventors: Noriyuki Yoneda, Yoshimi Shiroto, Kazuhiko Hamato, Sachio Asaoka, Tetsuo Maejima
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Patent number: 5316821Abstract: A partition plate for multiple-stage adsorption separator includes a planar body member having opposing external surfaces and a peripheral edge with conduits providing fluid communication between the opposing surfaces and different points on the peripheral edge. Each of the opposing surfaces is provided with a peripheral rim and covered with a perforated plate whereby an open chamber is defined between the body member and a perforated plate at each of the external faces.Type: GrantFiled: December 10, 1992Date of Patent: May 31, 1994Assignees: NKK Corporation, Chiyoda CorporationInventors: Seiya Otani, Hiroaki Taniguchi, Kei Yokoyama, Yoshimi Shiroto, Mitsunori Shimura, Osamu Akimoto, Masayoshi Notoya
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Patent number: 5200075Abstract: An adsorbent is charged into a horizontal type packed column having a multiplicity of packed vessels each of which is composed of a partition plate and a cylindrical body and which are connected through the partition plates, from an opening formed on the upper wall of each cylindrical body. Then, each opening is closed tightly with a detachable plug cover. The partition plate is provided with a first fluid passage through which a fluid is passed in the direction of the axis of the cylindrical body and a second fluid passage which is in communication with the first fluid passage, which extends toward the peripheral wall of the cylindrical body and which opens at the cylindrical body. This apparatus is suitable for use as a multiple-stage adsorption separator directed to a simulated moving-bed system.Type: GrantFiled: March 5, 1992Date of Patent: April 6, 1993Assignees: NKK Corporation, Chiyoda CorporationInventors: Seiya Otani, Hiroaki Taniguchi, Kei Yokoyama, Yoshimi Shiroto, Mitsunori Shimura, Osamu Akimoto, Masayoshi Notoya
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Patent number: 5193581Abstract: A selector valve used for distributing and combining process flow.Type: GrantFiled: March 17, 1992Date of Patent: March 16, 1993Assignees: NKK Corporation, Chiyoda CorporationInventors: Yoshimi Shiroto, Nobuhiro Onda, Yoshiharu Kataoka, Hirotoshi Koga, Akihiro Fujimori
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Patent number: 5055612Abstract: A process for the preparation of naphthalene mono or polycarboxylic acids, such as 2,6-naphthalene dicarboxylic acid, is disclosed which includes oxidizing a naphthalene compound such as 2,6-diisopropylnaphthalene in a specific solvent with molecular oxygen in the presence of a catalyst containing a heavy metal compound and a bromine compound. The solvent is an aliphatic monocarboxylic acid and may further contain benzene and/or water. By controlling the ratio of the amount of catalyst metal to the feed rate of the raw material naphthalene compound, the yield of desired product can be controlled.Type: GrantFiled: December 19, 1989Date of Patent: October 8, 1991Assignees: NKK Corporation, Chiyoda CorporationInventors: Yakudo Tachibana, Kazuhiko Tate, Masami Ono, Nobuhiro Takei, Jun Miki, Hiroaki Taniguchi, Yoshimi Shiroto, Misunori Shimura, Yoshio Fukui
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Patent number: 4992622Abstract: A method of separating 2,6-diisopropylnaphthalene from a mixture containing 2,6-diisopropylnaphthalene and structural isomers thereof including the 2,7-isomer is disclosed, wherein the mixture is first subjected to a selective adsorption and desorption treatment using a zeolite absorbent capable of adsorbing the 2,7-isomer to obtain a first extract containing the sorbed 2,7-isomer and a first raffinate containing non-sorbed isomers including the 2,6-isomer, the 2,6-isomer being thereafter separated from the first raffinate.Type: GrantFiled: August 2, 1989Date of Patent: February 12, 1991Assignees: Chiyoda Corporation, NKK CorporationInventors: Yoshimi Shiroto, Mitsunori Shimura, Kenji Shimokawa, Yoshio Fukui, Yakudo Tachibana, Kazuhiko Tate, Hiroaki Taniguchi
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Patent number: 4950824Abstract: A process for the production of 2,6-diisopropylnaphthalene is disclosed wherein an isopropylation reaction mixture containing isopropylated naphthalenes is subjected to transalkylation with a triisopropylnaphthalene-containing mixture to obtain a mixture containing mono-, di- and tri-isopropylnaphthalenes which is then separated into a first fraction containing monisopropylnaphthalenes, a second fraction containing diisopropylnaphthalenes and a third fraction containing triisopropylnaphthalenes. The first and third fractions are recycled to the above system, while the second fraction is subjected to separation treatments for the recovery of 2,6-diisopropylnaphthalene. The second fraction from which 2,6-diisopropylnaphthalene has been removed is subjected to transalkylation with naphthalene to obtain a monoisopropylnaphthalene-rich mixture which is to be fed to the isopropylation step.Type: GrantFiled: August 2, 1989Date of Patent: August 21, 1990Assignees: Chiyoda Corporation, NKK CorporationInventors: Yoshimi Shiroto, Mitsunori Shimura, Kenji Shimokawa, Yoshio Fukui, Sachio Asaoka, Hiroto Tajima, Kazuaki Ueda, Yakudo Tachibana, Kazuhiko Tate, Hiroaki Taniguchi
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Patent number: 4530753Abstract: Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subjected to a hydrotreatment in the presence of a specific catalyst including, as a carrier, a clay mineral consisting mainly of magnesium silicate having a double-chain structure such as sepiolite.Type: GrantFiled: July 16, 1984Date of Patent: July 23, 1985Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.Inventors: Yoshimi Shiroto, Shinichi Nakata, Hideki Hashimoto
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Patent number: 4530754Abstract: Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subjected to a hydrotreatment in the presence of a specific catalyst having a large pore volume in pores with diameters of 200-400 .ANG.. The hydrotreatment is carried out so that the product oil may have a toluene insoluble content of 0.5 wt % or less.Type: GrantFiled: July 16, 1984Date of Patent: July 23, 1985Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.Inventors: Yoshimi Shiroto, Shinichi Nakata, Hideki Hashimoto
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Patent number: 4444655Abstract: A catalyst for hydrotreating a heavy hydrocarbon oil containing asphaltenes comprises a porous carrier composed of one or more inorganic oxides of at least one element selected from among those of Groups II, III and IV of the Periodic Table, and at least one catalytic metal component composited with the carrier. The metal of the catalytic metal component is selected from among those of Groups VB, VIB, VIII and IB of the Periodic Table. The catalyst contains about 1 to 30% by weight of such catalytic metal component and has the following pore characteristics with regard to its pores having a diameter of 75 .ANG. or more: an average pore diameter APD of about 180 to 500 .ANG., a total pore volume PV, expressed in cc/g, being equal to or greater than a value X ##EQU1## the volume of pores with a diameter of about 180 to 500 .ANG. being at least about 0.2 cc/g, the volume of pores with a diameter of at least 1,500 .ANG. being not greater than about 0.03 cc/g, and a total surface area being at least about 60 m.Type: GrantFiled: September 30, 1982Date of Patent: April 24, 1984Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.Inventors: Yoshimi Shiroto, Takeo Ono, Sachio Asaoka, Munekazu Nakamura
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Patent number: 4439312Abstract: A catalyst for hydrotreating a heavy hydrocarbon oil comprises a carrier which is a calcined composite of a mixture of a clay mineral consisting mainly of magnesium silicate having a double-chain structure and a pseudoboehmite which shows a powder X-ray diffraction spectrum obtained by applying a CuK.sub..alpha. ray such that the half value width of the peak on the (020) plane is between about 0.8.degree. and 4.0.degree. and the intensity of said peak is between 1.2 and 8.0 times as high as that at 2.theta.=10.degree.. At least one catalytic metal component is composited with the carrier, the metal of the catalytic metal component being selected from the group consisting of metals belonging to Groups VB, VIB, VIII and IB of the Periodic Table. Disclosed also are a method of preparing such a catalyst, and a process for the hydrotreatment of heavy hydrocarbon oils containing asphaltenes and heavy metals.Type: GrantFiled: May 19, 1982Date of Patent: March 27, 1984Inventors: Sachio Asaoka, Takeo Ono, Yoshimi Shiroto