Patents by Inventor Jun-Chul Choi
Jun-Chul Choi 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: 20250115732Abstract: The present disclosure addresses the problem of providing a method for decomposing a crosslinked rubber that can improve monomer yield. The solution is a method of decomposing a crosslinked rubber that includes: a first decomposition step of pyrolyzing a crosslinked rubber containing a diene rubber at a temperature of 150° C. or more and 400° C. or less, and a second decomposition step of pyrolyzing a decomposition product obtained by the first decomposition step under an inert gas atmosphere and in the presence of a catalyst at a temperature of 300° C. or more and 950° C. or less. Preferably 80 mass % or more of the diene rubber in the crosslinked rubber is decomposed to diene oligomers having a weight-average molecular weight of 100 to 50,000 via the first decomposition step.Type: ApplicationFiled: February 6, 2023Publication date: April 10, 2025Applicants: BRIDGESTONE CORPORATION, TOHOKU UNIVERSITY, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Masahiro HOJO, Akira OKUNO, Marino KUNO, Masahiro HOMMA, Toshiaki YOSHIOKA, Shogo KUMAGAI, Norihisa FUKAYA, Satpriyo Putro WAHYU, Jun-Chul CHOI, Faried MIFTAH, Hiroshi YAMASHITA, Tadahiro FUJITANI
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Publication number: 20250087092Abstract: Disclosed are a three-dimensional (3D) simulation method and a 3D simulation apparatus. The 3D simulation method disclosed herein includes a step (S20) of separating point cloud data including a road, an obstacle, and a cargo transportation route into road data and obstacle data, a step (S40) of converting the road data into road mesh data, and converting the obstacle data into obstacle mesh data, a step (S60) of constructing a virtual environment by merging the road mesh data with the obstacle mesh data, a step (S80) of loading a specific cargo transportation route to the virtual environment, a step (S100) of loading a 3D transport truck and a 3D cargo to a predetermined point of the cargo transportation route, and a step (S120) of performing a route survey simulation while virtually driving the 3D transport truck and the 3D cargo along the cargo transportation route.Type: ApplicationFiled: December 4, 2023Publication date: March 13, 2025Applicants: SAMSUNG E&A CO., LTD., Morai Inc.Inventors: Jun Chul HWANG, Sung Il KIM, Yong Ho AHN, Jae Hun CHOI, Taek Sun LEE, Hwang JEON, Jun HONG, Ji Won JUNG
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Publication number: 20230212110Abstract: A method for producing a carbamic acid salt, including contacting a carbon dioxide-containing mixed gas having a partial pressure of carbon dioxide of 0.001 atm or more and less than 1 atm with an amino group-containing organic compound in the presence of a base in at least one organic solvent selected from the group consisting of an organic solvent having 2 or more and 8 or less carbon atoms, and a method for producing a carbamic acid ester or a urea derivative using the carbamic acid salt.Type: ApplicationFiled: June 3, 2021Publication date: July 6, 2023Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOSOH CORPORATIONInventors: Katsuhiko TAKEUCHI, Kazuhiro MATSUMOTO, Norihisa FUKAYA, Hiroki KOIZUMI, Jun-Chul CHOI, Masahito UCHIDA, Seiji MATSUMOTO, Satoshi HAMURA
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Patent number: 11028106Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.Type: GrantFiled: December 25, 2018Date of Patent: June 8, 2021Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norihisa Fukaya, Seong-Jib Choi, Jun-Chul Choi, Toshio Horikoshi, Sho Kataoka, Thuy Nguyen, Kazuhiko Sato, Minoru Hasegawa, Hiroshi Kumai
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Publication number: 20200347082Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.Type: ApplicationFiled: December 25, 2018Publication date: November 5, 2020Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norihisa FUKAYA, Seong-Jib CHOI, Jun-Chul CHOI, Toshio HORIKOSHI, Sho KATAOKA, Thuy NGUYEN, Kazuhiko SATO, Minoru HASEGAWA, Hiroshi KUMAI
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Patent number: 10752579Abstract: A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180° C. in the presence of zinc acetate and 2,2?-bipyridine.Type: GrantFiled: August 31, 2017Date of Patent: August 25, 2020Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Jun-Chul Choi, Norihisa Fukaya, Qiao Zhang, Hiroyuki Yasuda
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Patent number: 10738190Abstract: A resin composition includes: (a) a supported platinum catalyst having a structure shown by the following general formula (1) in which a platinum complex is supported on a surface of an inorganic oxide; and (b) a thermoplastic matrix resin. The resin composition is usable as an addition-reaction catalyst capable of imparting sufficient storability and quick curability to an addition-reaction curable composition. In the formula, L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound, and an isocyanide compound; and n represents the number of Ls and an integer from 0 to 2.Type: GrantFiled: February 28, 2017Date of Patent: August 11, 2020Assignees: SHIN-ETSU CHEMICAL CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Masayuki Ikeno, Takeshi Miyao, Takeharu Toyoshima, Jun-chul Choi, Norihisa Fukaya, Hiroyuki Yasuda
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Publication number: 20190185420Abstract: A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180° C. in the presence of zinc acetate and 2,2?-bipyridine.Type: ApplicationFiled: August 31, 2017Publication date: June 20, 2019Inventors: Jun-Chul CHOI, Norihisa FUKAYA, Qiao ZHANG, Hiroyuki YASUDA
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Publication number: 20190100649Abstract: A resin composition includes: (a) a supported platinum catalyst having a structure shown by the following general formula (1) in which a platinum complex is supported on a surface of an inorganic oxide; and (b) a thermoplastic matrix resin. The resin composition is usable as an addition-reaction catalyst capable of imparting sufficient storability and quick curability to an addition-reaction curable composition. In the formula, L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound, and an isocyanide compound; and n represents the number of Ls and an integer from 0 to 2.Type: ApplicationFiled: February 28, 2017Publication date: April 4, 2019Applicants: SHIN-ETSU CHEMICAL CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Masayuki IKENO, Takeshi MIYAO, Takeharu TOYOSHIMA, Jun-chul CHOI, Norihisa FUKAYA, Hiroyuki YASUDA
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Patent number: 10213777Abstract: A metal complex represented by the following Formula (1): (wherein M represents palladium or platinum; L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound and an isocyanide compound; n represents an integer of 0 to 2 showing the number of the ligand; and each of R1 to R4 represents an organic group). The metal complex described above can be fixed on an inorganic oxide while maintaining a skeletal structure thereof to obtain a supported metal complex, and this makes it possible to allow the supported metal complex to maintain the same catalytic activity as that of the original metal complex. Also, calcining the supported metal complex obtained in the manner described above makes it possible to obtain a supported metal catalyst which is improved in catalytic activity to a greater extent than conventional supported metal catalysts.Type: GrantFiled: March 2, 2017Date of Patent: February 26, 2019Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Jun-Chul Choi, Norihisa Fukaya, Hiroyuki Yasuda
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Patent number: 10000514Abstract: An object of the present invention is to provide a method for producing tetraalkoxysilane while saving energy at a high yield. Tetraalkoxysilane can be produced while saving energy at a high yield by the method including a first step of reacting alcohol with carbon dioxide in the presence of a dehydrating agent and/or in a reactor provided with a dehydrating means, and a second step of reacting a reaction mixture obtained in the first step with silicon oxide.Type: GrantFiled: April 30, 2015Date of Patent: June 19, 2018Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norihisa Fukaya, Seong-Jib Choi, Jun-Chul Choi, Toshio Horikoshi, Kazuhiko Sato, Hiroyuki Yasuda
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Publication number: 20170267701Abstract: An object of the present invention is to provide a method for producing tetraalkoxysilane while saving energy at a high yield. Tetraalkoxysilane can be produced while saving energy at a high yield by the method including a first step of reacting alcohol with carbon dioxide in the presence of a dehydrating agent and/or in a reactor provided with a dehydrating means, and a second step of reacting a reaction mixture obtained in the first step with silicon oxide.Type: ApplicationFiled: April 30, 2015Publication date: September 21, 2017Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norihisa Fukaya, Seong-Jib Choi, Jun-Chul Choi, Toshio Horikoshi, Kazuhiko Sato, Hiroyuki Yasuda
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Publication number: 20170225156Abstract: A metal complex represented by the following Formula (1): (wherein M represents palladium or platinum; L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound and an isocyanide compound; n represents an integer of 0 to 2 showing the number of the ligand; and each of R1 to R4 represents an organic group). The metal complex described above can be fixed on an inorganic oxide while maintaining a skeletal structure thereof to obtain a supported metal complex, and this makes it possible to allow the supported metal complex to maintain the same catalytic activity as that of the original metal complex. Also, calcining the supported metal complex obtained in the manner described above makes it possible to obtain a supported metal catalyst which is improved in catalytic activity to a greater extent than conventional supported metal catalysts.Type: ApplicationFiled: March 2, 2017Publication date: August 10, 2017Inventors: Jun-Chul Choi, Norihisa Fukaya, Hiroyuki Yasuda
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Patent number: 9616418Abstract: A metal complex represented by the following Formula (1): (wherein M represents palladium or platinum; L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound and an isocyanide compound; n represents an integer of 0 to 2 showing the number of the ligand; and each of R1 to R4 represents an organic group). The metal complex described above can be fixed on an inorganic oxide while maintaining a skeletal structure thereof to obtain a supported metal complex, which makes it possible to allow the supported metal complex to maintain the same catalytic activity as that of the original metal complex. Also, calcining the supported metal complex obtained in the manner described above makes it possible to obtain a supported metal catalyst improved in catalytic activity to a greater extent than conventional supported metal catalysts.Type: GrantFiled: March 13, 2014Date of Patent: April 11, 2017Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Jun-Chul Choi, Norihisa Fukaya, Hiroyuki Yasuda
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Publication number: 20160030932Abstract: A metal complex represented by the following Formula (1): (wherein M represents palladium or platinum; L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound and an isocyanide compound; n represents an integer of 0 to 2 showing the number of the ligand; and each of R1 to R4 represents an organic group). The metal complex described above can be fixed on an inorganic oxide while maintaining a skeletal structure thereof to obtain a supported metal complex, which makes it possible to allow the supported metal complex to maintain the same catalytic activity as that of the original metal complex. Also, calcining the supported metal complex obtained in the manner described above makes it possible to obtain a supported metal catalyst improved in catalytic activity to a greater extent than conventional supported metal catalysts.Type: ApplicationFiled: March 13, 2014Publication date: February 4, 2016Inventors: Jun-Chul Choi, Norihisa Fukaya, Hiroyuki Yasuda
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Patent number: 8455690Abstract: The invention provides a method for producing an arylhydroxylamine compound efficiently and safely under mild conditions. The method involves contacting a nitroaryl compound with a hydrogen source in the presence of a platinum catalyst supported on amino group-coordinated silica and a poisoning agent.Type: GrantFiled: March 27, 2008Date of Patent: June 4, 2013Assignees: Wako Pure Chemical Industries, Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Yasumasa Takenaka, Jun-Chul Choi, Toshiyasu Sakakura, Hiroyuki Yasuda, Takahiro Kiyosu
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Publication number: 20100113830Abstract: Problem To provide a method for producing an arylhydroxylamine compound efficiently and safely under mild conditions. Means for Solving the Problem The present invention relates to a method for producing anarylhydroxylamine compound, which comprises contacting a nitroaryl compound with a hydrogen source in the coexistence of a platinum catalyst supported on amino group-coordinated silica and a poisoning agent.Type: ApplicationFiled: March 27, 2008Publication date: May 6, 2010Applicant: WAKO PURE CHEMICAL INDUSTRIES, LTD.Inventors: Yasumasa Takenaka, Jun-Chul Choi, Toshiyasu Sakakura, Hiroyuki Yasuda, Takahiro Kiyosu
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Publication number: 20090012324Abstract: Disclosed is a process for production of a carboxylic acid ester from a carboxylic acid and an olefin or production of an ether compound from an alcohol and an olefin at low cost and with high yield in an industrially advantageous manner. The process comprises the step of reacting a carboxylic acid with an olefin to yield a corresponding carboxylic acid ester or reacting an alcohol with an olefin to yield a corresponding ether compound. In the process, a catalyst comprising a combination of (i) at least one metal compound selected from an iron compound, a cobalt compound and a nickel compound and (ii) an acidic compound is used.Type: ApplicationFiled: February 7, 2007Publication date: January 8, 2009Inventors: Jun-Chul Choi, Kazufumi Kohno, Hiroyuki Yasuda, Toshiyasu Sakakura