Patents by Inventor Masato AKAHIRA
Masato AKAHIRA 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: 20230220159Abstract: A crystalline polyethernitrile with a difference between a melting point and a crystallization temperature at a time of temperature-fall being 40° C. or more and 100° C. or less, the crystalline polyethernitrile includes N repeating units represented by Formula (I) and M repeating units represented by Formula (II), N and M being integers satisfying 0.90<[N/(N+M)]<1.Type: ApplicationFiled: May 24, 2021Publication date: July 13, 2023Inventors: Taisuke Hirano, Risano Nakajima, Masato Akahira, Soichiro Iwahana, Koji Yamauchi
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Publication number: 20220411379Abstract: The present invention relates to a method of producing ?-caprolactam, the method including the following steps (A) and (B): (A) a step of reacting 5-cyanovaleramide with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst to obtain a 5-cyanovaleramide hydrogenation reaction mixture; (B) a step of heating the 5-cyanovaleramide hydrogenation reaction mixture at a temperature of 180° C. or higher and 300° C. or lower in an aqueous solvent to obtain ?-caprolactam.Type: ApplicationFiled: November 18, 2020Publication date: December 29, 2022Applicant: TORAY INDUSTRIES, INC.Inventors: Daijiro TSUKAMOTO, Kenji KAWAMURA, Katsushige YAMADA, Masato AKAHIRA, Daisuke YAMAMOTO
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Publication number: 20220356140Abstract: The present invention relates to a method of producing adipic acid, including a step (hydrogenation step) of reacting 3-hydroxyadipic acid-3,6-lactone with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst. The hydrogenation catalyst preferably includes one kind or two or more kinds of transition metal elements selected from the group consisting of palladium, platinum, ruthenium, rhodium, rhenium, nickel, cobalt, iron, iridium, osmium, copper, and chromium.Type: ApplicationFiled: September 24, 2020Publication date: November 10, 2022Applicant: TORAY INDUSTRIES, INC.Inventors: Daijiro TSUKAMOTO, Kenji KAWAMURA, Katsushige YAMADA, Masato AKAHIRA, Daisuke YAMAMOTO
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Patent number: 11149001Abstract: A method produces ?-caprolactam through adipamide as an intermediate, and characteristically includes a lactamization step of reacting adipamide, formed from a material compound, with hydrogen and ammonia in the presence of a catalyst containing: a metal oxide mainly containing an oxide(s) of one or more metallic elements selected from the group consisting of metallic elements of group 5 and groups 7 to 14 in the 4th to 6th periods of the periodic table; and a metal and/or a metal compound having a hydrogenation ability.Type: GrantFiled: December 5, 2017Date of Patent: October 19, 2021Assignee: TORAY INDUSTRIES, INC.Inventors: Daijiro Tsukamoto, Masateru Ito, Katsushige Yamada, Masato Akahira, Daisuke Yamamoto, Koji Yamauchi
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Publication number: 20210032197Abstract: The present invention provides a method of producing a nitrile from a primary amide, characterized in that the primary amide is subjected to a dehydration reaction in a supercritical fluid in the presence of an acid catalyst. The present invention achieves the object of reducing the corrosion of a reactor and the thermal decomposition of raw materials, as well as provides the effect of improving the reaction rate and nitrile selectivity.Type: ApplicationFiled: February 5, 2019Publication date: February 4, 2021Applicant: TORAY INDUSTRIES, INC.Inventors: Daijiro TSUKAMOTO, Kenji KAWAMURA, Katsushige YAMADA, Masato AKAHIRA, Daisuke YAMAMOTO
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Publication number: 20200062704Abstract: The present invention is a method of producing ?-caprolactam through adipamide as an intermediate, and characteristically includes a lactamization step of reacting adipamide, formed from a material compound, with hydrogen and ammonia in the presence of a catalyst containing: a metal oxide mainly containing an oxide(s) of one or more metallic elements selected from the group consisting of metallic elements of group 5 and groups 7 to 14 in the 4th to 6th periods of the periodic table; and a metal and/or a metal compound having a hydrogenation ability. The method can increase the selectivity of ?-caprolactam.Type: ApplicationFiled: December 5, 2017Publication date: February 27, 2020Applicant: TORAY INDUSTRIES, INC.Inventors: Daijiro TSUKAMOTO, Masateru ITO, Katsushige YAMADA, Masato AKAHIRA, Daisuke YAMAMOTO, Koji YAMAUCHI
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Patent number: 10364218Abstract: A method of producing ?-caprolactam from 3-oxoadipic acid includes: step 1 of mixing at least one selected from the group consisting of 3-oxoadipic acid and salts thereof with a catalyst and a solvent in the presence of hydrogen to produce 3-hydroxyadipic acid; and step 2 of reacting the 3-hydroxyadipic acid which is a product of step 1, a salt or carboxylic acid derivative thereof, or a mixture of these with hydrogen and ammonia.Type: GrantFiled: September 8, 2016Date of Patent: July 30, 2019Assignee: Toray Industries, Inc.Inventors: Daijiro Tsukamoto, Masateru Ito, Katsushige Yamada, Kohei Yamashita, Masato Akahira, Koji Yamauchi
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Patent number: 10196352Abstract: A method for selective production of ?-caprolactam, wherein a substance inducible from a biomass resource is used as a material; the reaction process is short; ammonium sulfate is not produced as a by-product; and production of by-products is suppressed; is disclosed. The method for producing ?-caprolactam comprises the step of reacting a particular compound inducible from a biomass resource, such as ?-hydromuconic acid, 3-hydroxyadipic acid, or 3-hydroxyadipic acid-3,6-lactone, or a salt thereof with hydrogen or ammonia.Type: GrantFiled: October 27, 2015Date of Patent: February 5, 2019Assignee: TORAY INDUSTRIES, INC.Inventors: Masateru Ito, Daijiro Tsukamoto, Kenji Kawamura, Kohei Yamashita, Masato Akahira, Katsushige Yamada, Koji Yamauchi
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Patent number: 10179849Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a chelate ligand compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.Type: GrantFiled: October 29, 2015Date of Patent: January 15, 2019Assignee: TORAY INDUSTRIES, INC.Inventors: Masato Akahira, Ken Sudo, Eri Yasutake, Koya Kato
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Publication number: 20180237389Abstract: A method of producing ?-caprolactam from 3-oxoadipic acid includes: step 1 of mixing at least one selected from the group consisting of 3-oxoadipic acid and salts thereof with a catalyst and a solvent in the presence of hydrogen to produce 3-hydroxyadipic acid; and step 2 of reacting the 3-hydroxyadipic acid which is a product of step 1, a salt or carboxylic acid derivative thereof, or a mixture of these with hydrogen and ammonia.Type: ApplicationFiled: September 8, 2016Publication date: August 23, 2018Inventors: Daijiro Tsukamoto, Masateru Ito, Katsushige Yamada, Kohei Yamashita, Masato Akahira, Koji Yamauchi
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Patent number: 9951203Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a chelate ligand compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.Type: GrantFiled: October 29, 2015Date of Patent: April 24, 2018Assignee: TORAY INDUSTRIES, INC.Inventors: Masato Akahira, Ken Sudo, Eri Yasutake, Koya Kato
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Patent number: 9920180Abstract: An object is to provide a polyester resin having excellent hydrolysis resistance and good color tone and a method of producing the same. There is provided a polyester resin composition comprising a polyester resin that is prepared from a dicarboxylic acid or a dicarboxylic acid dialkyl ester and a diol as main raw material and mixed with: a copper halide; and at least one additive selected from the group consisting of compounds expressed by a formula (i) and compounds expressed by a formula (ii): MXn . . . (i) (where M denotes an alkali metal or an alkaline earth metal, X denotes at least one element selected from bromine, iodine and chlorine, and n=1 or 2); and (RCOO)nM . . . (ii) (where R denotes hydrogen or an alkyl group containing 1 to 30 carbon atoms, M denotes an alkali metal or an alkaline earth metal, and n=1 or 2).Type: GrantFiled: March 26, 2015Date of Patent: March 20, 2018Assignee: TORAY INDUSTRIES, INC.Inventors: Masato Akahira, Koya Kato
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Publication number: 20170320819Abstract: A method for selective production of ?-caprolactam, wherein a substance inducible from a biomass resource is used as a material; the reaction process is short; ammonium sulfate is not produced as a by-product; and production of by-products is suppressed; is disclosed. The method for producing ?-caprolactam comprises the step of reacting a particular compound inducible from a biomass resource, such as ?-hydromuconic acid, 3-hydroxyadipic acid, or 3-hydroxyadipic acid-3,6-lactone, or a salt thereof with hydrogen or ammonia.Type: ApplicationFiled: October 27, 2015Publication date: November 9, 2017Applicant: TORAY INDUSTRIES, INC.Inventors: Masateru ITO, Daijiro TSUKAMOTO, Kenji KAWAMURA, Kohei YAMASHITA, Masato AKAHIRA, Katsushige YAMADA, Koji YAMAUCHI
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Publication number: 20170218178Abstract: A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a nitrogen-containing compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.Type: ApplicationFiled: October 29, 2015Publication date: August 3, 2017Applicant: TORAY INDUSTRIES, INC.Inventors: Masato AKAHIRA, Ken SUDO, Eri YASUTAKE, Koya KATO
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Publication number: 20170096541Abstract: An object is to provide a polyester resin having excellent hydrolysis resistance and good color tone and a method of producing the same. There is provided a polyester resin composition comprising a polyester resin that is prepared from a dicarboxylic acid or a dicarboxylic acid dialkyl ester and a diol as main raw material and mixed with: a copper halide; and at least one additive selected from the group consisting of compounds expressed by a formula (i) and compounds expressed by a formula (ii): MXn . . . (i) (where M denotes an alkali metal or an alkaline earth metal, X denotes at least one element selected from bromine, iodine and chlorine, and n=1 or 2); and (RCOO)nM . . . (ii) (where R denotes hydrogen or an alkyl group containing 1 to 30 carbon atoms, M denotes an alkali metal or an alkaline earth metal, and n=1 or 2).Type: ApplicationFiled: March 26, 2015Publication date: April 6, 2017Applicant: TORAY INDUSTRIES, INC.Inventors: Masato AKAHIRA, Koya KATO