Patents by Inventor Hisao Urata
Hisao Urata 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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Publication number: 20030149293Abstract: A method for producing 1,3-cyclohexanediol compounds, particularly a 1,3-cyclohexanediol compound rich in cis-form. A 1,3-cyclohexanediol compound is reduced with a boron hydride compound such as sodium borohydride. Selectivity of cis-form is improved when an alkali metal compound and/or an alkaline earth metal compound, particularly a halide, is allowed to exist in the reaction system.Type: ApplicationFiled: February 5, 2003Publication date: August 7, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shuji Ichikawa, Hisao Urata, Shihomi Suzuki
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Patent number: 6583324Abstract: A process for producing an aldehyde, which comprises a reaction step of producing an aldehyde by reacting an olefinic compound with carbon monoxide and hydrogen in the presence of a rhodium complex catalyst comprising at least rhodium and an organic phosphite in a reaction zone, a separation step of obtaining a catalyst solution containing the rhodium complex catalyst by separating the aldehyde from a reaction solution taken from the reaction zone, and a recycling step of recycling the catalyst solution into the reaction zone, wherein the aldehyde is separated from the reaction solution in such a manner as to make an aldehyde concentration from 0.5 to 99 wt % in the catalyst solution.Type: GrantFiled: September 18, 2001Date of Patent: June 24, 2003Assignee: Mitsubishi Chemical CorporationInventors: Masaki Takai, Iwao Nakajima, Tooru Tsukahara, Yoshiyuki Tanaka, Hisao Urata, Akio Nakanishi
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Publication number: 20020049355Abstract: A process for producing an aldehyde, which comprises a reaction step of producing an aldehyde by reacting an olefinic compound with carbon monoxide and hydrogen in the presence of a rhodium complex catalyst comprising at least rhodium and an organic phosphite in a reaction zone, a separation step of obtaining a catalyst solution containing the rhodium complex catalyst by separating the aldehyde from a reaction solution taken from the reaction zone, and a recycling step of recycling the catalyst solution into the reaction zone, wherein the aldehyde is separated from the reaction solution in such a manner as to make an aldehyde concentration from 0.5 to 99 wt % in the catalyst solution.Type: ApplicationFiled: September 18, 2001Publication date: April 25, 2002Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Masaki Takai, Iwao Nakajima, Tooru Tsukahara, Yoshiyuki Tanaka, Hisao Urata, Akio Nakanishi
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Patent number: 6300515Abstract: The invention provides a process that includes isomerizing at least one allylic substrate having an acyloxyl group or a hydroxyl group at the allyl position thereof, to produce a corresponding allylic isomer, wherein the isomerizing is conducted in the presence of a catalyst that includes a Group VIII-X metal compound and a phosphite compound.Type: GrantFiled: April 17, 2000Date of Patent: October 9, 2001Assignee: Mitsubishi Chemical CorporationInventors: Mikael Retboll, Yoshinori Hara, Hisao Urata, Hironobu Ohno
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Patent number: 6291717Abstract: A process for producing an aldehyde, which comprises a reaction step of producing an aldehyde by reacting an olefinic compound with carbon monoxide and hydrogen in the presence of a rhodium complex catalyst comprising at least rhodium and an organic phosphite in a reaction zone, a separation step of obtaining a catalyst solution containing the rhodium complex catalyst by separating the aldehyde from a reaction solution taken from the reaction zone, and a recycling step of recycling the catalyst solution into the reaction zone, wherein the aldehyde is separated from the reaction solution in such a manner as to make an aldehyde concentration from 0.5 to 99 wt % in the catalyst solution.Type: GrantFiled: December 10, 1999Date of Patent: September 18, 2001Assignee: Mitsubishi Chemical CorporationInventors: Masaki Takai, Iwao Nakajima, Tooru Tsukahara, Yoshiyuki Tanaka, Hisao Urata, Akio Nakanishi
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Patent number: 6265620Abstract: Aldehydes are produced by reacting an olefinic compound with carbon monoxide and hydrogen in the presence of a catalyst containing a metal of Group 8 to 10 and a phosphonite compound as a trivalent organic phosphorus compound.Type: GrantFiled: September 27, 1999Date of Patent: July 24, 2001Assignee: Mitsubishi Chemical CorporationInventors: Hisao Urata, Yasuhiro Wada
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Patent number: 6172267Abstract: A process for producing aldehydes, which comprises reacting a mono-olefinic compound with carbon monoxide and hydrogen in the presence of a Group VIII transition metal compound of a bisphosphite compound of the following formula (1) or (2)Type: GrantFiled: October 27, 1998Date of Patent: January 9, 2001Assignee: Mitsubishi Chemical CorporationInventors: Hisao Urata, Yasuhiro Wada, Yoshiyuki Tanaka, Naoki Suzuki, Hiroaki Itagaki
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Patent number: 6133495Abstract: A process for producing an .alpha.-olefin oligomer, comprising subjecting an .alpha.-olefin to oligomerization in a reaction solution containing a chromium-based catalyst produced by bringing at least a chromium compound (a), a pyrrole ring-containing compound (b), an alkyl aluminum compound (c) and a halogen-containing compound (d) into contact with each other, wherein the chromium-based catalyst is a catalyst produced by bringing the pyrrole ring-containing compound (b), the alkyl aluminum compound (c) and the halogen-containing compound (d) into contact with each other in a hydrocarbon and/or halogenated hydrocarbon solvent, and then bringing the resultant mixed solution into contact with the chromium compound (a); or a catalyst produced by bringing the chromium compound (a), the pyrrole ring-containing compound (b), the alkyl aluminum compound (c) and the halogen-containing compound (d) into contact with each other in a hydrocarbon and/or halogenated hydrocarbon solvent in the absence of .alpha.Type: GrantFiled: January 2, 1998Date of Patent: October 17, 2000Assignee: Mitsubishi Chemical CorporationInventors: Hisao Urata, Takayuki Aoshima, Sugio Nishimura
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Patent number: 5962744Abstract: A process comprising subjecting at least one compound containing at least one carbon--carbon double bond or at least one carbon--carbon triple bond, hydrogen and carbon monoxide, to a hydrocarbonylation reaction in supercritical carbon dioxide, in the presence of a Group VIII transition metal catalyst precursor, and a phosphite ligand.Type: GrantFiled: March 27, 1998Date of Patent: October 5, 1999Assignees: The Research Foundation of State University of New York, Mitsubishi Chemical CorporationInventors: Iwao Ojima, Hisao Urata
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Patent number: 5910619Abstract: The disclosure described a process for producing an .alpha.-olefin oligomer, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent in the presence of a catalytically effective amount of a chromium-based catalyst system composed of a combination of at least (a) a chromium compound, (b) a nitrogen-containing compound of at least one selected from the group consisting of an amine, an amide and an imide, (c) an alkylaluminum compound and (d) a halogen-containing compound,wherein each of the .alpha.-olefin, the chromium compound (a), the nitrogen-containing compound (b) of at least one selected from the group consisting of an amine, an amide and an imide, the alkylaluminum compound (c) and the halogen-containing compound (d) is supplied to a reaction system in a mode that the chromium compound (a) and the alkylaluminum compound (c) do not contact each other before each of said compounds (a) to (d) and the .alpha.-olefin coexists in the reaction solvent and the oligomerization of an .alpha.Type: GrantFiled: June 20, 1995Date of Patent: June 8, 1999Assignee: Mitsubishi Chemical CorporationInventors: Hisao Urata, Takayuki Aoshima, Toshiyuki Oshiki, Jun Takahara, Shinji Iwade, Yoshiaki Nanba, Yoshitaka Araki, Hirofumi Nakamura, Takeshi Okano
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Patent number: 5910600Abstract: A bisphosphite compound of the following formula (A): ##STR1## wherein --Ar--Ar-- is a bisarylene group represented by any one of the formulae (A-I) to (A-III) defined in the specification, and each of Z.sub.1 to Z.sub.4 is a C.sub.4-20 aromatic or heteroaromatic group which may have a substituent, wherein each of substituents on carbon atoms of an aromatic ring adjacent to the carbon atom bonded to the oxygen atom in each of Z.sub.1 to Z.sub.4, is a C.sub.0-2 group, and each pair of Z.sub.1 and Z.sub.2, and Z.sub.3 and Z.sub.4, are not bonded to each other.Type: GrantFiled: April 28, 1997Date of Patent: June 8, 1999Assignee: Mitsubishi Chemical CorporationInventors: Hisao Urata, Hiroaki Itagaki, Eitaro Takahashi, Yasuhiro Wada, Yoshiyuki Tanaka, Yasukazu Ogino
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Patent number: 5750817Abstract: The disclosure describes a process for preparing .alpha.-olefin oligomers, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent by reacting said .alpha.-olefin in a chromium-based catalyst system composed of a combination of at least a chromium compound, an amine or metal amide, and an alkylaluminum compound, in a contacting mode that the chromium compound and the alkylaluminum compound are not previously contacted with each other.Type: GrantFiled: March 13, 1996Date of Patent: May 12, 1998Assignee: Mitsubishi Chemical CorporationInventors: Eiji Tanaka, Hisao Urata, Toshiyuki Oshiki, Takayuki Aoshima, Riichirou Kawashima, Shinji Iwade, Hirofumi Nakamura, Syunji Katsuki, Takeshi Okano
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Patent number: 5557026Abstract: A method for oligomerizing an .alpha.-olefin in the presence of a catalyst comprising a specific chromium compound including chromium atom and pyrrolyl group and an alkylaluminum compound, wherein the .alpha.-olefin is contacted to the chromium compound and the alkylaluminum compound without preliminarily contacting the chromium compound to either the .alpha.-olefin or the alkylaluminum compound.Type: GrantFiled: July 31, 1995Date of Patent: September 17, 1996Assignee: Mitsubishi Chemical CorporationInventors: Eiji Tanaka, Hisao Urata, Toshiyuki Oshiki
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Patent number: 5491272Abstract: A method for oligomerizing an .alpha.-olefin in the presence of a catalyst comprising a specific chromium compound including chromium atom and pyrrolyl group and an alkylaluminum compound, wherein the .alpha.-olefin is contacted to the chromium compound and the alkylaluminum compound without preliminarily contacting the chromium compound to either the .alpha.-olefin or the alkylaluminum compound.Type: GrantFiled: September 17, 1993Date of Patent: February 13, 1996Assignee: Mitsubishi Chemical CorporationInventors: Eiji Tanaka, Hisao Urata, Toshiyuki Oshiki
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Patent number: 5151535Abstract: A fluorine-containing .alpha.,.omega.-bifunctional compound having the formula: ##STR1## wherein each of R.sup.1 and R.sup.2 independently is a hydrogen atom, an alkyl group or an aralkyl group; X is --COOH, --COOR.sup.3, --COY or --NCO, wherein R.sup.3 is an alkyl group or an aralkyl group and Y is a halogen atom or N.sub.3 ; and n is an integer of at least 1 provided that when X is --COOH, n is an integer of at least 4.Type: GrantFiled: January 31, 1990Date of Patent: September 29, 1992Assignee: Sagami Chemical Research CenterInventors: Takamasa Fuchikami, Hisao Urata
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Patent number: 4905091Abstract: A recording data processor comprises a first bit map memory for storing recording data, a second bit map memory for storing color data representing a reproduction color of the recording data stored in the first bit map memory, for each recording data, and a generation circuit for generating recording data for each color based on the recording data fetched from the first bit map memory and the color data fetched from the second bit map memory.Type: GrantFiled: October 26, 1988Date of Patent: February 27, 1990Assignee: Canon Kabushiki KaishaInventors: Masayoshi Suzuki, Hisao Urata, Satoshi Egawa, Shigeru Ueda
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Patent number: 4855487Abstract: An improved process for preparing a fluorine-containing carboxylic acid ester useful as an intermediate for producing a fluorine-containing carboxylic acid is disclosed. The process comprises reacting a fluorine-containing alkyl halide with carbon monoxide and an alcohol in the presence of a transition metal catalyst of the Group VIII of the Periodic Table and a base, and provides the desired carbonylated compound in high yield.Type: GrantFiled: July 10, 1987Date of Patent: August 8, 1989Assignee: Sagami Chemical Research CenterInventors: Takamasa Fuchikami, Hisao Urata, Yoshimitsu Ishii, Yoshiko Obata