Patents by Inventor Masazumi Tamura
Masazumi Tamura 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: 11547984Abstract: The invention relates to a novel catalyst for hydrogenation for hydrogenating at least one of dicarboxylic acid or its acid anhydride. The catalyst for hydrogenation according to a first embodiment is obtained by supporting at least one of palladium or platinum, and cobalt on a carrier, and subjecting the resulting carrier to a reduction treatment at 400 K or higher. The catalyst for hydrogenation according to a second embodiment is obtained by supporting at least one of palladium or platinum, and molybdenum on a carrier, and subjecting the resulting carrier to a reduction treatment at 500 K or higher.Type: GrantFiled: July 6, 2018Date of Patent: January 10, 2023Assignee: TOYO TIRE CORPORATIONInventors: Norihiko Nakamura, Keiichi Tomishige, Yoshinao Nakagawa, Masazumi Tamura
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Publication number: 20210205792Abstract: The invention relates to a novel catalyst for hydrogenation for hydrogenating at least one of dicarboxylic acid or its acid anhydride. The catalyst for hydrogenation according to a first embodiment is obtained by supporting at least one of palladium or platinum, and cobalt on a carrier, and subjecting the resulting carrier to a reduction treatment at 400 K or higher. The catalyst for hydrogenation according to a second embodiment is obtained by supporting at least one of palladium or platinum, and molybdenum on a carrier, and subjecting the resulting carrier to a reduction treatment at 500 K or higher.Type: ApplicationFiled: July 6, 2018Publication date: July 8, 2021Applicant: Toyo Tire CorporationInventors: Norihiko Nakamura, Keiichi Tomishige, Yoshinao Nakagawa, Masazumi Tamura
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Patent number: 11040334Abstract: Provided is a catalyst for reduction reaction with which 1,4-butanediol or tetrahydrofuran can be obtained with higher selectivity than with the related art, using a raw material derived from biomass. The catalyst is used in a reduction reaction of 3,4-dihydroxytetrahydrofuran with hydrogen, wherein the catalyst contains metal catalysts (1) and (2) below; metal catalyst (1): a catalyst containing M1 and M2 below as metal species and supported on a carrier; and metal catalyst (2): a catalyst containing M1 below as a metal species and supported on a carrier; M1: one or more selected from the group consisting of iron and elements belonging to periods 4 to 6 and groups 5 to 7 of the periodic table; and M2: one or more selected from the group consisting of ruthenium, osmium, and elements belonging to periods 4 to 6 and groups 9 to 11 of the periodic table.Type: GrantFiled: December 28, 2017Date of Patent: June 22, 2021Assignee: DAICEL CORPORATIONInventors: Keiichi Tomishige, Yoshinao Nakagawa, Masazumi Tamura, Yuuichirou Hirai, Yasuteru Kajikawa, Keisuke Ono
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Patent number: 10584092Abstract: Provided is a method for regenerating an aromatic amide compound into a corresponding aromatic nitrile compound, the method realizing a dehydration reaction of providing a target compound selectively at a high yield with generation of a by-product being suppressed. Also provided is a method for producing an aromatic nitrile compound that decreases the number of steps of dehydration reaction and significantly improves the reaction speed at a pressure close to normal pressure. Furthermore, the above-described production method is applied to a carbonate ester production method to provide a method for producing carbonate ester efficiently. The above-described objects are achieved by a method for producing an aromatic nitrile compound including a dehydration reaction of dehydrating an aromatic amide compound, in which the dehydration reaction uses diphenylether.Type: GrantFiled: June 20, 2017Date of Patent: March 10, 2020Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., TOHOKU UNIVERSITY, NIPPON STEEL CORPORATION, NIPPON STEEL ENGINEERING CO., LTD.Inventors: Yousuke Shinkai, Hongyu Liu, Hidefumi Harada, Yoshinori Isahaya, Keiichi Tomishige, Yoshinao Nakagawa, Masazumi Tamura, Kimihito Suzuki, Yasuki Namiki
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Publication number: 20190366304Abstract: Provided is a catalyst for reduction reaction with which 1,4-butanediol or tetrahydrofuran can be obtained with higher selectivity than with the related art, using a raw material derived from biomass. The catalyst is used in a reduction reaction of 3,4-dihydroxytetrahydrofuran with hydrogen, wherein the catalyst contains metal catalysts (1) and (2) below; metal catalyst (1): a catalyst containing M1 and M2 below as metal species and supported on a carrier; and metal catalyst (2): a catalyst containing M1 below as a metal species and supported on a carrier; M1: one or more selected from the group consisting of iron and elements belonging to periods 4 to 6 and groups 5 to 7 of the periodic table; and M2: one or more selected from the group consisting of ruthenium, osmium, and elements belonging to periods 4 to 6 and groups 9 to 11 of the periodic table.Type: ApplicationFiled: December 28, 2017Publication date: December 5, 2019Applicant: DAICEL CORPORATIONInventors: Keiichi TOMISHIGE, Yoshinao NAKAGAWA, Masazumi TAMURA, Yuuichirou HIRAI, Yasuteru KAJIKAWA, Keisuke ONO
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Publication number: 20190185408Abstract: Provided is a method for regenerating an aromatic amide compound into a corresponding aromatic nitrile compound, the method realizing a dehydration reaction of providing a target compound selectively at a high yield with generation of a by-product being suppressed. Also provided is a method for producing an aromatic nitrile compound that decreases the number of steps of dehydration reaction and significantly improves the reaction speed at a pressure close to normal pressure. Furthermore, the above-described production method is applied to a carbonate ester production method to provide a method for producing carbonate ester efficiently. The above-described objects are achieved by a method for producing an aromatic nitrile compound including a dehydration reaction of dehydrating an aromatic amide compound, in which the dehydration reaction uses diphenylether.Type: ApplicationFiled: June 20, 2017Publication date: June 20, 2019Applicants: Mitsubishi Gas Chemical Company, Inc., Tohoku University, Nippon Steel & Sumitomo Metal Corporation, Nippon Steel & Sumikin Engineering Co., Ltd.Inventors: Yousuke SHINKAI, Hongyu LIU, Hidefumi HARADA, Yoshinori ISAHAYA, Keiichi TOMISHIGE, Yoshinao NAKAGAWA, Masazumi TAMURA, Kimihito SUZUKI, Yasuki NAMIKI
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Patent number: 8476478Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a good selectivity and a high yield, as well as hydrogenolysis catalysts used in the production process. The present invention provides (1) a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing a copper component, wherein the catalyst is a catalyst (A) containing the copper component, an iron component and an aluminum component, or a catalyst (B) containing the copper component and a silicon component; and (2) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component, an iron component and an aluminum component, and (3) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component and a silicon component.Type: GrantFiled: February 16, 2012Date of Patent: July 2, 2013Assignee: Kao CorporationInventors: Nobuyoshi Suzuki, Masazumi Tamura, Yohei Yoshikawa, Taku Mimura, Masakatsu Takahashi
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Patent number: 8258351Abstract: The present invention relates to a process for producing a hydrogenolysis product of a polyhydric alcohol in the presence of a catalyst in which a conversion rate of the polyhydric alcohol as well as a selectivity to the hydrogenolysis product, in particular, a selectivity of glycerol to propanediols, can be enhanced. The process for producing a hydrogenolysis product of a polyhydric alcohol according to the present invention includes the step of subjecting a polyhydric alcohol solution having a water content of less than 10% by mass to hydrogenolysis by a fixed-bed continuous liquid phase reaction method in the presence of a hydrogenolysis catalyst.Type: GrantFiled: December 26, 2008Date of Patent: September 4, 2012Assignee: Kao CorporationInventors: Nobuyoshi Suzuki, Masazumi Tamura, Taku Mimura
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Publication number: 20120142976Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a good selectivity and a high yield, as well as hydrogenolysis catalysts used in the production process. The present invention provides (1) a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing a copper component, wherein the catalyst is a catalyst (A) containing the copper component, an iron component and an aluminum component, or a catalyst (B) containing the copper component and a silicon component; and (2) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component, an iron component and an aluminum component, and (3) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component and a silicon component.Type: ApplicationFiled: February 16, 2012Publication date: June 7, 2012Applicant: KAO CORPORATIONInventors: Nobuyoshi SUZUKI, Masazumi TAMURA, Yohei YOSHIKAWA, Taku MIMURA, Masakatsu TAKAHASHI
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Patent number: 8188321Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a good selectivity and a high yield, as well as hydrogenolysis catalysts used in the production process. The present invention provides (1) a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing a copper component, wherein the catalyst is a catalyst (A) containing the copper component, an iron component and an aluminum component, or a catalyst (B) containing the copper component and a silicon component; and (2) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component, an iron component and an aluminum component, and (3) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component and a silicon component.Type: GrantFiled: April 4, 2008Date of Patent: May 29, 2012Assignee: Kao CorporationInventors: Nobuyoshi Suzuki, Masazumi Tamura, Yohei Yoshikawa, Taku Mimura, Masakatsu Takahashi
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Patent number: 8158834Abstract: The present invention relates to a process for producing a hydrogenolysis product of a polyhydric alcohol in an efficient manner. The present invention provides a process for producing a hydrogenolysis product of a polyhydric alcohol in a batch manner in which the hydrogenolysis reaction is carried out while removing water retained in a liquid phase of a reaction system.Type: GrantFiled: January 8, 2009Date of Patent: April 17, 2012Assignee: KAO CorporationInventors: Nobuyoshi Suzuki, Masazumi Tamura
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Publication number: 20110046418Abstract: The present invention relates to a process for producing a hydrogenolysis product of a polyhydric alcohol in the presence of a catalyst in which a conversion rate of the polyhydric alcohol as well as a selectivity to the hydrogenolysis product, in particular, a selectivity of glycerol to propanediols, can be enhanced. The process for producing a hydrogenolysis product of a polyhydric alcohol according to the present invention includes the step of subjecting a polyhydric alcohol solution having a water content of less than 10% by mass to hydrogenolysis by a fixed-bed continuous liquid phase reaction method in the presence of a hydrogenolysis catalyst.Type: ApplicationFiled: December 26, 2008Publication date: February 24, 2011Applicant: KAO CORPORATIONInventors: Nobuyoshi Suzuki, Masazumi Tamura, Taku Mimura
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Publication number: 20110040130Abstract: The present invention relates to a process for producing a hydrogenolysis product of a polyhydric alcohol in an efficient manner. The present invention provides a process for producing a hydrogenolysis product of a polyhydric alcohol in a batch manner in which the hydrogenolysis reaction is carried out while removing water retained in a liquid phase of a reaction system.Type: ApplicationFiled: January 8, 2009Publication date: February 17, 2011Applicant: KAO CORPORATIONInventors: Nobuyoshi Suzuki, Masazumi Tamura
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Patent number: 7799957Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a high selectivity as well as hydrogenolysis catalysts used in the hydrogenolysis reaction. The present invention provides a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing (A) a platinum-supporting heterogeneous catalyst component and (B) at least one catalyst component selected from the group consisting of tungsten components and molybdenum components, or in the presence of a catalyst containing a heterogeneous catalyst component formed by supporting (A?) platinum and the above catalyst component (B), on a common carrier; as well as catalysts for hydrogenolysis of polyhydric alcohols.Type: GrantFiled: April 23, 2007Date of Patent: September 21, 2010Assignee: KAO CorporationInventors: Nobuyoshi Suzuki, Yohei Yoshikawa, Masakatsu Takahashi, Masazumi Tamura
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Publication number: 20100113841Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a good selectivity and a high yield, as well as hydrogenolysis catalysts used in the production process. The present invention provides (1) a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing a copper component, wherein the catalyst is a catalyst (A) containing the copper component, an iron component and an aluminum component, or a catalyst (B) containing the copper component and a silicon component; and (2) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component, an iron component and an aluminum component, and (3) a hydrogenolysis catalyst for polyhydric alcohols which includes a copper component and a silicon component.Type: ApplicationFiled: April 4, 2008Publication date: May 6, 2010Applicant: KAO CORPORATIONInventors: Nobuyoshi Suzuki, Masazumi Tamura, Yohei Yoshikawa, Taku Mimura, Masakatsu Takahashi
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Publication number: 20090177018Abstract: The present invention relates to a process for producing hydrogenolysis products of polyhydric alcohols with a high selectivity as well as hydrogenolysis catalysts used in the hydrogenolysis reaction. The present invention provides a process for producing a hydrogenolysis product of a polyhydric alcohol which includes the step of reacting the polyhydric alcohol with hydrogen in the presence of a catalyst containing (A) a platinum-supporting heterogeneous catalyst component and (B) at least one catalyst component selected from the group consisting of tungsten components and molybdenum components, or in the presence of a catalyst containing a heterogeneous catalyst component formed by supporting (A?) platinum and the above catalyst component (B), on a common carrier; as well as catalysts for hydrogenolysis of polyhydric alcohols.Type: ApplicationFiled: April 23, 2007Publication date: July 9, 2009Applicant: KAO CORPORATIONInventors: Nobuyoshi Suzuki, Yohei Yoshikawa, Masakatsu Takahashi, Masazumi Tamura