Patents by Inventor Yasuhiro Kushida
Yasuhiro Kushida 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: 11220430Abstract: Provided are a method and system for efficiently producing a purified aqueous hydrogen peroxide solution having a high purity. This method for producing a purified aqueous hydrogen peroxide solution comprises: step A for vaporizing a raw material containing a crude aqueous hydrogen peroxide solution; step B for condensing at least a portion of the gas and liquid obtained in step A, and separating the gas and liquid into a gas phase and a liquid phase; and step C for returning, into the raw material, at least a portion of a separation liquid which is the separated liquid phase, wherein step C further includes step D for adjusting the concentration of hydrogen peroxide in the separation liquid.Type: GrantFiled: February 21, 2018Date of Patent: January 11, 2022Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kohei Shigeta, Yasuhiro Kushida, Tetsuya Yamamoto, Shinichiro Matsuura, Hidetoshi Ikeda
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Publication number: 20190352179Abstract: Provided are a method and system for efficiently producing a purified aqueous hydrogen peroxide solution having a high purity. This method for producing a purified aqueous hydrogen peroxide solution comprises: step A for vaporizing a raw material containing a crude aqueous hydrogen peroxide solution; step B for condensing at least a portion of the gas and liquid obtained in step A, and separating the gas and liquid into a gas phase and a liquid phase; and step C for returning, into the raw material, at least a portion of a separation liquid which is the separated liquid phase, wherein step C further includes step D for adjusting the concentration of hydrogen peroxide in the separation liquid.Type: ApplicationFiled: February 21, 2018Publication date: November 21, 2019Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kohei SHIGETA, Yasuhiro KUSHIDA, Tetsuya YAMAMOTO, Shinichiro MATSUURA, Hidetoshi IKEDA
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Patent number: 9206286Abstract: The present invention provides a method for producing a polyester resin comprising dicarboxylic acid units and diol units, wherein at least a portion of the diol units is a diol unit having a cyclic acetal skeleton, the method comprising specific steps (1) to (4-2).Type: GrantFiled: May 30, 2013Date of Patent: December 8, 2015Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Tatsuya Yamauchi, Junichi Edahiro, Yasuhiro Kushida, Takami Morishita
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Publication number: 20150141614Abstract: The present invention provides a method for producing a polyester resin comprising dicarboxylic acid units and diol units, wherein at least a portion of the diol units is a diol unit having a cyclic acetal skeleton, the method comprising specific steps (1) to (4-2).Type: ApplicationFiled: May 30, 2013Publication date: May 21, 2015Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Tatsuya Yamauchi, Junichi Edahiro, Yasuhiro Kushida, Takami Morishita
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Patent number: 8575277Abstract: A safe and stable production method of a hydrogenated polymer having high transparency, which is a production method of a hydrogenated polymer by hydrogenating aromatic rings of an aromatic vinyl compound-(meth)acrylate copolymer, in which (1) a solvent solution of the copolymer is added to a reactor, which has a solvent and a supported palladium catalyst charged therein, under a hydrogen atmosphere at a rate of from 0.01 to 15 g/hour in terms of the copolymer per unit mass (g) of the supported palladium catalyst, thereby performing hydrogenation reaction, and then such an operation is performed repeatedly that (2) a hydrogenated polymer is obtained from 30 to 90% by mass of the resulting reaction mixed solution, and a fresh solvent solution of the copolymer is added to the reactor, in which the residual reaction mixed solution is left, or to which the residual reaction mixed solution is returned, at a rate of from 0.Type: GrantFiled: August 4, 2008Date of Patent: November 5, 2013Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yasuhiro Kushida, Yuuichi Sugano, Tatsuya Yamauchi, Hideyuki Sato, Yoshikazu Shima
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Publication number: 20110269912Abstract: A safe and stable production method of a hydrogenated polymer having high transparency, which is a production method of a hydrogenated polymer by hydrogenating aromatic rings of an aromatic vinyl compound-(meth)acrylate copolymer, in which (1) a solvent solution of the copolymer is added to a reactor, which has a solvent and a supported palladium catalyst charged therein, under a hydrogen atmosphere at a rate of from 0.01 to 15 g/hour in terms of the copolymer per unit mass (g) of the supported palladium catalyst, thereby performing hydrogenation reaction, and then such an operation is performed repeatedly that (2) a hydrogenated polymer is obtained from 30 to 90% by mass of the resulting reaction mixed solution, and a fresh solvent solution of the copolymer is added to the reactor, in which the residual reaction mixed solution is left, or to which the residual reaction mixed solution is returned, at a rate of from 0.Type: ApplicationFiled: August 4, 2008Publication date: November 3, 2011Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yasuhiro Kushida, Yuuichi Sugano, Tatsuya Yamauchi, Hideyuki Sato, Yoshikazu Shima
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Patent number: 7488782Abstract: A process for producing a hydrogenated polymer, which includes a step of hydrogenating aromatic rings of an aromatic vinyl compound—(meth)acrylate copolymer. In the process, the copolymer having a ratio, A/B, of from 0.25 to 4.0 (A is a molar number of constitutional units derived from the (meth)acrylate monomer, and B is a molar number of constitutional units derived from the aromatic vinyl monomer) is hydrogenated in a solvent in the presence of a catalyst which is composed of zirconium oxide supporting palladium. By the process, a highly transparent, hydrogenated polymer is stably and rapidly produced for a long period of time or repeatedly.Type: GrantFiled: February 27, 2007Date of Patent: February 10, 2009Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yuuichi Sugano, Yasuhiro Kushida, Tatsuya Yamauchi, Hideyuki Sato, Yoshikazu Shima
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Patent number: 7446152Abstract: In the production of a nuclear-hydrogenated polymer, the hydrogenation of an aromatic vinyl compound—(meth)acrylate copolymer is conducted in a mixed solvent comprising an ester compound and an alcohol compound in the presence of a catalyst. By this method, a highly transparent nuclear-hydrogenated polymer is produced safely, stably and quickly, even when the degree of nuclear-hydrogenation is low.Type: GrantFiled: March 14, 2006Date of Patent: November 4, 2008Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tatsuya Yamauchi, Yasuhiro Kushida, Yuuichi Sugano, Yoshikazu Shima
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Publication number: 20070185277Abstract: A process for producing a hydrogenated polymer, which includes a step of hydrogenating aromatic rings of an aromatic vinyl compound—(meth)acrylate copolymer. In the process, the copolymer having a ratio, A/B, of from 0.25 to 4.0 (A is a molar number of constitutional units derived from the (meth)acrylate monomer, and B is a molar number of constitutional units derived from the aromatic vinyl monomer) is hydrogenated in a solvent in the presence of a catalyst which is composed of zirconium oxide supporting palladium. By the process, a highly transparent, hydrogenated polymer is stably and rapidly produced for a long period of time or repeatedly.Type: ApplicationFiled: February 27, 2007Publication date: August 9, 2007Inventors: Yuuichi Sugano, Yasuhiro Kushida, Tatsuya Yamauchi, Hideyuki Sato, Yoshikazu Shima
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Publication number: 20060205886Abstract: In the production of a nuclear-hydrogenated polymer, the hydrogenation of an aromatic vinyl compound—(meth)acrylate copolymer is conducted in a mixed solvent comprising an ester compound and an alcohol compound in the presence of a catalyst. By this method, a highly transparent nuclear-hydrogenated polymer is produced safely, stably and quickly, even when the degree of nuclear-hydrogenation is low.Type: ApplicationFiled: March 14, 2006Publication date: September 14, 2006Inventors: Tatsuya Yamauchi, Yasuhiro Kushida, Yuuichi Sugano, Yoshikazu Shima
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Patent number: 6916458Abstract: There is disclosed a process for producing a hydrogen-containing gas, which comprises reacting methanol, steam and oxygen in the presence of a catalyst comprising palladium, zinc and at least one metal selected from the group consisting of chromium, gallium, copper, indium, bismuth and platinum.Type: GrantFiled: November 12, 2002Date of Patent: July 12, 2005Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yasuhiro Kushida, Masayuki Katagiri, Hutoshi Ikoma, Shigeyuki Hirose, Yasushi Hiramatsu, Mikio Yoneoka
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Publication number: 20030157019Abstract: There is disclosed a process for producing a hydrogen-containing gas, which comprises reacting methanol, steam and oxygen in the presence of a catalyst comprising palladium, zinc and at least one metal selected from the group consisting of chromium, gallium, copper, indium, bismuth and platinum.Type: ApplicationFiled: November 12, 2002Publication date: August 21, 2003Inventors: Yasuhiro Kushida, Masayuki Katagiri, Hutoshi Ikoma, Shigeyuki Hirose, Yasushi Hiramatsu, Mikio Yoneoka
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Patent number: 5190804Abstract: A coating composition, a coated inorganic hardened product having a cured layer formed from the coating composition, and a process for producing the coated hardened product.A coating composition comprising the following components (A) to (C);(A) an organosilane oligomer solution containing silica particles dispersed therein, said solution being obtained by partially hydrolyzing a hydrolyzable organosilane represented by the formulaR.sup.1.sub.n SiX.sub.4-n (I)wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, n is an integer of from 0 to 3, and X represents a hydrolyzable group, in a colloidal silica dispersed in an organic solvent or water,(B) a polyorganosiloxane having a silanol group in the molecule thereof, represented by the average composition formulaR.sup.2.sub.a Si(OH).sub.b O.sub.(4-a-b)/2 (II)wherein R.sup.Type: GrantFiled: October 3, 1991Date of Patent: March 2, 1993Assignees: Toshiba Silicone Co., Ltd., Matsushita Electric Works, Ltd.Inventors: Kazuo Seto, Minoru Inoue, Motoaki Haruna, Hiroshi Kimura, Yasutoshi Nagano, Yasuhiro Kushida
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Patent number: 5091460Abstract: A coating composition, a coated inorganic hardened product having a cured layer formed from the coating composition, and a process for producing the coated hardened product.a coating composition comprising the following components (A) to (C);an organosilane oligomer solution containing silica particles dispersed therein, said solution being obtained by partially hydrolyzing a hydrolyzable organosilane represented by the formulaR.sup.1.sub.n SiX.sub.4-n (I)wherein R.sup.1 which may be the same or different each represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, n is an integer of from 0 to 3, and X represents a hydrolyzable group, in a colloidal silica dispersed in an organic solvent or water,(B) a polyorganosiloxane having a silanol group in the molecule thereof, represented by the average composition formulaR.sup.2.sub.a Si(OH).sub.b O.sub.(4-a-b)/2 (II)wherein R.sup.Type: GrantFiled: November 27, 1990Date of Patent: February 25, 1992Assignees: Toshiba Silicone Co., Ltd., Matsushita Electric & Works Ltd.Inventors: Kazuo Seto, Minoru Inoue, Motoaki Haruna, Hiroshi Kimura, Yasutoshi Nagano, Yasuhiro Kushida