Patents by Inventor Yoshikuni Okumura
Yoshikuni Okumura 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: 11981765Abstract: The present invention provides: a catalyst which has high activity and enables the production of an olefin polymer that has a polar group; and a method for producing the polymer. A catalyst for olefin polymerization, which contains a metal complex represented by general formula (C1); and a method for producing an ethylene (co)polymer, wherein (1) ethylene is polymerized, (2) ethylene and an olefin having a polar group represented by general formula (1) are copolymerized, or (3) ethylene, an olefin having a polar group represented by general formula (1) and another monomer are copolymerized, with use of the above-described catalyst. (In the formulae, the symbols are as defined in the description; and at least one of R6 and R7 represents a 9-fluorenyl analogous group represented by general formula (2).Type: GrantFiled: February 25, 2020Date of Patent: May 14, 2024Assignees: THE UNIVERSITY OF TOKYO, Resonac Corporation, JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko Nozaki, Junichi Kuroda, Shinya Hayashi, Yoshikuni Okumura, Masahiro Uematsu, Yusuke Mitsushige
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Patent number: 11697698Abstract: The present invention pertains to a method for producing a copolymer of ethylene and an allyl monomer having a polar group represented by general formula (1), or a copolymer of ethylene, an allyl monomer having a polar group represented by general formula (1), and other monomers, wherein the copolymer is produced in the presence of a boron compound having a boron-hydrogen bond or a boron-carbon bond (for example, a compound represented by general formula (2)) by using a metal complex represented by general formula (C1) as a polymerization catalyst (the symbols in the formulas are as described in the description). According to the present invention, a copolymer of ethylene and an allyl monomer can be efficiently produced with high catalytic activity, wherein the copolymer has a polar group and can be used in various applications.Type: GrantFiled: March 7, 2019Date of Patent: July 11, 2023Assignees: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko Nozaki, Shingo Ito, Junichi Kuroda, Yoshikuni Okumura, Shinya Hayashi, Minoru Kobayashi, Yuichiro Yasukawa
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Patent number: 11655360Abstract: A gas-barrier resin (A) having an oxygen permeability coefficient of 1.0×10?14 (cm3·cm/cm2·s·Pa) or less; and a copolymer (B) containing monomer structural units represented by the formula (1), the formula (2), and the formula (3): where: R1 represents a hydrogen atom or a methyl group; R2 represents a hydrocarbon group having 1 to 20 carbon atoms that may be substituted with a halogen atom, a hydroxy group, an alkoxy group, or an amino group; 1, m, and n represent numerical values representing molar proportions of the respective monomer structural units, and n may represent 0; and p represents an integer of from 1 to 4, wherein a ratio of a mass of the copolymer (B) to a total mass of the gas-barrier resin (A) and the copolymer (B) is from 1 mass % to 40 mass %.Type: GrantFiled: July 17, 2018Date of Patent: May 23, 2023Assignees: SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Junichi Kuroda, Yoshikuni Okumura, Shinya Hayashi, Masahiro Uematsu, Takaaki Hattori, Yuichiro Yasukawa
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Publication number: 20220234024Abstract: Provided is a method for recovering, by pressure swing adsorption, unreacted olefins from a stream of a chemical reaction process in which an olefin is used as a material, the method enables desorption of gas at a relatively high desorption operation pressure, more preferably at a pressure not lower than the atmospheric pressure, and enables reuse of a separation agent. As the separation agent, a metal complex is used, in which pressure P3 at which a local maximum of dA/dP is obtained during adsorption and pressure P4 at which a local maximum of dA/dP is obtained during desorption are located between an adsorption operation pressure P1 and a desorption operation pressure P2, where dA/dP represents a value obtained by differentiating A by P, assuming that an olefin adsorption amount (A) is a function of an adsorption pressure (P), i.e., A=f(P), on an adsorption isotherm indicating the pressure (P) and the adsorption amount (A).Type: ApplicationFiled: July 30, 2020Publication date: July 28, 2022Applicant: SHOWA DENKO K.K.Inventors: Yoshihiro WATANABE, Yoshikuni OKUMURA
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Publication number: 20220220387Abstract: Provided is impregnated pitch having a high fixed carbon content despite being petroleum-based pitch. The method for producing impregnated pitch for graphite electrode production according to one embodiment includes heat treatment of ethylene bottom oil and distillation of the heat-treated product to remove low-boiling-point compounds.Type: ApplicationFiled: January 21, 2021Publication date: July 14, 2022Applicant: SHOWA DENKO K.K.Inventors: Nobuhiro NISHI, Keisuke OTA, Yoshikuni OKUMURA
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Patent number: 11352453Abstract: A catalyst for olefin polymerization that contains a metal complex represented by general formula (C1) and a method for producing polyethylene, a copolymer of ethylene and an olefin having a polar group represented by general formula (1), or a copolymer of ethylene, an olefin having a polar group represented by general formula (1) and another monomer, using the aforementioned metal complex as a polymerization catalyst, wherein the symbols in formula (C1) and formula (1) are as defined in the specification.Type: GrantFiled: November 7, 2018Date of Patent: June 7, 2022Assignees: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko Nozaki, Shingo Ito, Junichi Kuroda, Yoshikuni Okumura, Shinya Hayashi, Yumiko Minami, Minoru Kobayashi, Yuichiro Yasukawa
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Publication number: 20220089791Abstract: The present invention provides: a catalyst which has high activity and enables the production of an olefin polymer that has a polar group; and a method for producing the polymer. A catalyst for olefin polymerization, which contains a metal complex represented by general formula (C1); and a method for producing an ethylene (co)polymer, wherein (1) ethylene is polymerized, (2) ethylene and an olefin having a polar group represented by general formula (1) are copolymerized, or (3) ethylene, an olefin having a polar group represented by general formula (1) and another monomer are copolymerized, with use of the above-described catalyst. (In the formulae, the symbols are as defined in the description; and at least one of R6 and R7 represents a 9-fluorenyl analogous group represented by general formula (2).Type: ApplicationFiled: February 25, 2020Publication date: March 24, 2022Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko NOZAKI, Junichi KURODA, Shinya HAYASHI, Yoshikuni OKUMURA, Masahiro UEMATSU, Yusuke MITSUSHIGE
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Patent number: 11248074Abstract: The present invention relates to a method for producing a copolymer of ethylene and an allyl monomer that is represented by formula (1) and has a polar group, or a copolymer of ethylene, the allyl monomer that is represented by formula (1) and has a polar group, and another monomer. This production method is characterized by using a metal complex, which is represented by general formula (C1), as a polymerization catalyst and by having a silane compound, which is represented by general formula (2) and has a silicon-hydrogen bond, coexist with the metal complex. (In the formulae, the symbols are as defined in the description.) According to the present invention, a copolymer of an allyl monomer that has a polar group is able to be produced with high catalytic activity, said copolymer being capable of having various applications.Type: GrantFiled: January 29, 2019Date of Patent: February 15, 2022Assignees: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Shingo Ito, Kyoko Nozaki, Junichi Kuroda, Yoshikuni Okumura, Shinya Hayashi, Minoru Kobayashi, Yuichiro Yasukawa
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Publication number: 20210147669Abstract: A gas-barrier resin (A) having an oxygen permeability coefficient of 1.0×10?14 (cm3·cm/cm2·s·Pa) or less; and a copolymer (B) containing monomer structural units represented by the formula (1), the formula (2), and the formula (3): where: R1 represents a hydrogen atom or a methyl group; R2 represents a hydrocarbon group having 1 to 20 carbon atoms that may be substituted with a halogen atom, a hydroxy group, an alkoxy group, or an amino group; 1, m, and n represent numerical values representing molar proportions of the respective monomer structural units, and n may represent 0; and p represents an integer of from 1 to 4, wherein a ratio of a mass of the copolymer (B) to a total mass of the gas-barrier resin (A) and the copolymer (B) is from 1 mass % to 40 mass %.Type: ApplicationFiled: July 17, 2018Publication date: May 20, 2021Applicants: SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Junichi KURODA, Yoshikuni OKUMURA, Shinya HAYASHI, Masahiro UEMATSU, Takaaki HATTORI, Yuichiro YASUKAWA
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Publication number: 20210054117Abstract: The present invention relates to a method for producing a copolymer of ethylene and an allyl monomer that is represented by formula (1) and has a polar group, or a copolymer of ethylene, the allyl monomer that is represented by formula (1) and has a polar group, and another monomer. This production method is characterized by using a metal complex, which is represented by general formula (C1), as a polymerization catalyst and by having a silane compound, which is represented by general formula (2) and has a silicon-hydrogen bond, coexist with the metal complex. (In the formulae, the symbols are as defined in the description.) According to the present invention, a copolymer of an allyl monomer that has a polar group is able to be produced with high catalytic activity, said copolymer being capable of having various applications.Type: ApplicationFiled: January 29, 2019Publication date: February 25, 2021Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Shingo ITO, Kyoko NOZAKI, Junichi KURODA, Yoshikuni OKUMURA, Shinya HAYASHI, Minoru KOBAYASHI, Yuichiro YASUKAWA
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Publication number: 20210040251Abstract: The present invention pertains to a method for producing a copolymer of ethylene and an allyl monomer having a polar group represented by general formula (1), or a copolymer of ethylene, an allyl monomer having a polar group represented by general formula (1), and other monomers, wherein the copolymer is produced in the presence of a boron compound having a boron-hydrogen bond or a boron-carbon bond (for example, a compound represented by general formula (2)) by using a metal complex represented by general formula (C1) as a polymerization catalyst (the symbols in the formulas are as described in the description). According to the present invention, a copolymer of ethylene and an allyl monomer can be efficiently produced with high catalytic activity, wherein the copolymer has a polar group and can be used in various applications.Type: ApplicationFiled: March 7, 2019Publication date: February 11, 2021Applicants: The University of Tokyo, SHOWA DENKO K. K., Japan Polyethylene CorporationInventors: Kyoko NOZAKI, Shingo ITO, Junichi KURODA, Yoshikuni OKUMURA, Shinya HAYASHI, Minoru KOBAYASHI, Yuichiro YASUKAWA
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Publication number: 20200347159Abstract: A catalyst for olefin polymerization that contains a metal complex represented by general formula (C1) and a method for producing polyethylene, a copolymer of ethylene and an olefin having a polar group represented by general formula (1), or a copolymer of ethylene, an olefin having a polar group represented by general formula (1) and another monomer, using the aforementioned metal complex as a polymerization catalyst, wherein the symbols in formula (C1) and formula (1) are as defined in the specification.Type: ApplicationFiled: November 7, 2018Publication date: November 5, 2020Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K. K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko NOZAKI, Shingo ITO, Junichi KURODA, Yoshikuni OKUMURA, Shinya HAYASHI, Yumiko MINAMI, Minoru KOBAYASHI, Yuichiro YASUKAWA
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Patent number: 10414837Abstract: The present invention relates to a method for producing a copolymer of ethylene and a polar group-containing olefin using as a catalyst a metal complex of group 10 elements having a structure represented by formula (C4) and (C5) (in the formula, “Men” represents a menthyl group and “Me” represents a methyl group). The method of the present invention makes it possible to produce a polar group-containing olefin polymer available for various applications, as being a high molecular weight body, which has been difficult to produce, and to produce the polymer in a molecular weight range such that the polymer has good moldability.Type: GrantFiled: September 15, 2015Date of Patent: September 17, 2019Assignees: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko Nozaki, Shingo Ito, Yusuke Ota, Yoshikuni Okumura, Junichi Kuroda, Masafumi Koyano, Minoru Kobayashi, Hiroyuki Shimizu
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Patent number: 9957285Abstract: A separating material superior to conventional separating materials, and a separation method are provided, with which 1,3-butadiene is selectively separated and recovered from a mixed gas including 1,3-butadiene and C4 hydrocarbons other than 1,3-butadiene. A metal complex, which comprises a dicarboxylic acid compound (I) (see (I) below) represented by general formula (I), an ion of a metal such as beryllium, and a dipyridyl compound (II) represented by general formula (II), namely L-Z-L (II) (see L below), is characterized by including, as the dipyridyl compound (II), at least two different dipyridyl compounds (II). The metal complex is used as a 1,3-butadiene separating material. Formula (I) L is represented by any of the compounds below.Type: GrantFiled: July 1, 2014Date of Patent: May 1, 2018Assignee: SHOWA DENKO K.K.Inventors: Keisuke Kishida, Yoshihiro Watanabe, Yoshikuni Okumura
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Patent number: 9856190Abstract: A separating material superior to conventional separating materials, and a separation method are provided, with which 1,3-butadiene is selectively separated and recovered from a mixed gas including 1,3-butadiene and C4 hydrocarbons other than 1,3-butadiene. A metal complex, which comprises a dicarboxylic acid compound (I) (see (I) below) represented by general formula (I), an ion of a metal such as beryllium, and a bipyridyl compound (II) represented by general formula (II), namely L-Z-L (II) (see (L) below), is characterized by including, as the dicarboxylic acid compound (I), at least two different dicarboxylic acid compounds (I). The metal complex is used as a 1,3-butadiene separating material. Formula (I) L is represented by any of the compounds below. Formula (L).Type: GrantFiled: July 1, 2014Date of Patent: January 2, 2018Assignee: SHOWA DENKO K.K.Inventors: Keisuke Kishida, Yoshihiro Watanabe, Yoshikuni Okumura
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Publication number: 20170313792Abstract: The present invention relates to a method for producing a copolymer of ethylene and a polar group-containing olefin using as a catalyst a metal complex of group 10 elements having a structure represented by formula (C4) and (C5) (in the formula, “Men” represents a menthyl group and “Me” represents a methyl group). The method of the present invention makes it possible to produce a polar group-containing olefin polymer available for various applications, as being a high molecular weight body, which has been difficult to produce, and to produce the polymer in a molecular weight range such that the polymer has good moldability.Type: ApplicationFiled: September 15, 2015Publication date: November 2, 2017Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K., JAPAN POLYETHYLENE CORPORATIONInventors: Kyoko NOZAKI, Shingo ITO, Yusuke OTA, Yoshikuni OKUMURA, Junichi KURODA, Masafumi KOYANO, Minoru KOBAYASHI, Hiroyuki SHIMIZU
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Patent number: 9499644Abstract: The present invention relates to a method for producing a homopolymer of olefin represented by formula (1): CH2?CHR1 (R1 is a hydrogen atom or hydrocarbon group having 1 to 20 carbon atoms) or a copolymer of two or more thereof or a method for producing a copolymer of olefin represented by formula (1) with olefin containing a polar group represented by formula (2): CH2?CHR2R3 (R2 is a hydrogen atom or methyl group, R3 is —COOR12, —CN, —OCOR12, —OR12, —CH2—OCOR12, —CH2OH, —CH2—N(R13)2 or —CH2-Hal (R12, R13 and Hal have the same meanings as stated in the description), using as a catalyst a metal complex of group 10 elements in the periodic system typified by the structure represented by formula 1 (“Men” represents a menthyl group and “Me” represents a methyl group). The present invention enables the production of high molecular weight polymers of the polar group-containing monomers such as polar group-containing allyl compounds.Type: GrantFiled: January 22, 2014Date of Patent: November 22, 2016Assignees: SHOWA DENKO K.K., THE UNIVERSITY OF TOKYOInventors: Shingo Ito, Kyoko Nozaki, Yusuke Ota, Yoshikuni Okumura, Junichi Kuroda
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Patent number: 9475032Abstract: Provided is a molded article for hydrocarbon adsorption, in which a porous metal complex, the structure of which may vary with adsorption and desorption of gases, can exhibit to a sufficient degree the adsorption and desorption capabilities inherent to the complex. This molded article for hydrocarbon adsorption is characterized by including (A) a metal complex constituted by metal ions, and organic ligands capable of bonding to the metal ions, and (B) a polymer binder component containing within its molecules a total of 0.3 mmol/g to 8.0 mmol/g, inclusive, of at least one functional group selected from group consisting of the carboxyl group, the hydroxyl group, amino groups, the mercapto group, epoxy groups, and the sulfo group.Type: GrantFiled: July 1, 2014Date of Patent: October 25, 2016Assignee: SHOWA DENKO K.K.Inventors: Yoshihiro Watanabe, Keisuke Kishida, Yoshikuni Okumura
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Publication number: 20160175810Abstract: Provided is a molded article for hydrocarbon adsorption, in which a porous metal complex, the structure of which may vary with adsorption and desorption of gases, can exhibit to a sufficient degree the adsorption and desorption capabilities inherent to the complex. This molded article for hydrocarbon adsorption is characterized by including (A) a metal complex constituted by metal ions, and organic ligands capable of bonding to the metal ions, and (B) a polymer binder component containing within its molecules a total of 0.3 mmol/g to 8.0 mmol/g, inclusive, of at least one functional group selected from group consisting of the carboxyl group, the hydroxyl group, amino groups, the mercapto group, epoxy groups, and the sulfo group.Type: ApplicationFiled: July 1, 2014Publication date: June 23, 2016Applicant: SHOWA DENKO K.KInventors: Yoshihiro WATANABE, Keisuke KISHIDA, Yoshikuni OKUMURA
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Publication number: 20160159712Abstract: A separating material superior to conventional separating materials, and a separation method are provided, with which 1,3-butadiene is selectively separated and recovered from a mixed gas including 1,3-butadiene and C4 hydrocarbons other than 1,3-butadiene. A metal complex, which comprises a dicarboxylic acid compound (I) (see (I) below) represented by general formula (I), an ion of a metal such as beryllium, and a bipyridyl compound (II) represented by general formula (II), namely L-Z-L (II) (see (L) below), is characterized by including, as the dicarboxylic acid compound (I), at least two different dicarboxylic acid compounds (I). The metal complex is used as a 1,3-butadiene separating material. Formula (I) L is represented by any of the compounds below.Type: ApplicationFiled: July 1, 2014Publication date: June 9, 2016Applicant: SHOWA DENKO K.K.Inventors: Keisuke KISHIDA, Yoshihiro WATANABE, Yoshikuni OKUMURA