Patents by Inventor Kenji Haraya
Kenji Haraya 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: 10456751Abstract: An object of the present invention is to provide a method capable of easily controlling the permeation rate and the selectivity of gas molecules, in a hollow fiber carbon membrane which can be used as a gas separation membrane. The present invention provides a method of producing a hollow fiber carbon membrane, the method including: a preparation step of preparing a precursor made of an organic polymer compound in the form of a hollow fiber; a preheating step of heating the precursor to a temperature of 150° C. to 400° C. in an atmosphere containing an oxygen gas; and a carbonization step of heating the precursor which has been subjected to the preheating step to a temperature of 450° C. to 850° C., thereby carbonizing the precursor; wherein the carbonization step includes heating the precursor in the presence of a hydrocarbon gas which may contain a nitrogen atom and which has from 1 to 8 carbon atoms.Type: GrantFiled: March 2, 2016Date of Patent: October 29, 2019Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Miki Yoshimune, Kenji Haraya, Nobuo Hara
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Publication number: 20180078907Abstract: An object of the present invention is to provide a method capable of easily controlling the permeation rate and the selectivity of gas molecules, in a hollow fiber carbon membrane which can be used as a gas separation membrane. The present invention provides a method of producing a hollow fiber carbon membrane, the method including: a preparation step of preparing a precursor made of an organic polymer compound in the form of a hollow fiber; a preheating step of heating the precursor to a temperature of 150° C. to 400° C. in an atmosphere containing an oxygen gas; and a carbonization step of heating the precursor which has been subjected to the preheating step to a temperature of 450° C. to 850° C., thereby carbonizing the precursor; wherein the carbonization step includes heating the precursor in the presence of a hydrocarbon gas which may contain a nitrogen atom and which has from 1 to 8 carbon atoms.Type: ApplicationFiled: March 2, 2016Publication date: March 22, 2018Inventors: Miki Yoshimune, Kenji Haraya, Nobuo Hara
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Patent number: 9132381Abstract: The hydrogen separation device comprises a laminate formed by laminating and integrating a hydrogen separation layer, a mixed gas layer kept adjacent to one surface of the hydrogen separation layer and having a mixed gas flow path, and a transmitted gas layer kept adjacent to the other surface of the hydrogen separation layer and having a transmitted gas flow path, and a vessel containing the laminate therein and filled with a buffer gas, wherein a buffer space is provided between the laminate and the inner wall of the vessel in which a buffer gas can reach at least one end face of the laminate in the lamination direction, and wherein the pressure in the buffer space is equal to or higher than the higher one of the pressure in the mixed gas flow path and the pressure in the transmitted gas flow path.Type: GrantFiled: December 13, 2011Date of Patent: September 15, 2015Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE ABD TECHNOLOGYInventors: Shigeki Hara, Masakazu Mukaida, Hiroyuki Suda, Kenji Haraya
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Publication number: 20130333569Abstract: The hydrogen separation device comprises a laminate formed by laminating and integrating a hydrogen separation layer, a mixed gas layer kept adjacent to one surface of the hydrogen separation layer and having a mixed gas flow path, and a transmitted gas layer kept adjacent to the other surface of the hydrogen separation layer and having a transmitted gas flow path, and a vessel containing the laminate therein and filled with a buffer gas, wherein a buffer space is provided between the laminate and the inner wall of the vessel in which a buffer gas can reach at least one end face of the laminate in the lamination direction, and wherein the pressure in the buffer space is equal to or higher than the higher one of the pressure in the mixed gas flow path and the pressure in the transmitted gas flow path.Type: ApplicationFiled: December 13, 2011Publication date: December 19, 2013Inventors: Shigeki Hara, Masakazu Mukaida, Hiroyuki Suda, Kenji Haraya
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Publication number: 20130032028Abstract: Provided are a method for operating a gas separation device capable of performing gas separation with high separation capability and treatment amount in a small membrane area or in a small number of separation membrane modules, and a method for recovering a residual gas capable of performing more suitable detoxifying treatment or recycling by efficiently separating and recovering a mixed gas remaining in a cylinder, using the operating method. Two or more separation membrane modules are connected with each other in parallel.Type: ApplicationFiled: April 8, 2011Publication date: February 7, 2013Applicants: National Institute of Advanced Industrial Science, Taiyo Nippon Sanso CorporationInventors: Yuzuru Miyazawa, Yoko Aomura, Yoshihiko Kobayashi, Kenji Haraya, Miki Yoshimune
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Patent number: 8357228Abstract: A gas purification method of the present invention uses a carbon membrane having a molecular sieving action to purify at least one selected from the group consisting of a hydride gas, a hydrogen halide gas, and a halogen gas, each gas containing an impurity at 10 ppm or less. The present invention can be used for a recovery unit that recoveries a used gas to reuse it as an ultrapure semiconductor material gas, and a unit or equipment that produces or charges an ultrapure semiconductor material gas.Type: GrantFiled: October 9, 2008Date of Patent: January 22, 2013Assignee: Taiyo Nippon Sanso CorporationInventors: Yuzuru Miyazawa, Yoshihiko Kobayashi, Kenji Haraya, Miki Yoshimune
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Patent number: 8303690Abstract: A hollow fiber carbon membrane is provided, which has excellent gas separation performance, unbreakable flexibility and high utility. The hollow fiber carbon membrane comprises carbonized substance obtained by calcination of a hollow fiber-like material formed from a polyphenylene oxide derivative, and has an external diameter in the range of 0.08 mm to 0.25 mm. The polyphenylene oxide derivative substantially comprises repeating units represented by the following (a) and (b) (in the structural formula, R11 and R12 independently represent hydrogen atom or sulfone group, except that R11 and R12 are both hydrogen atoms), wherein the ratio A (%) of the repeating unit (b) to the repeating units (a)+(b) satisfies 15%<A<60%.Type: GrantFiled: July 31, 2008Date of Patent: November 6, 2012Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Miki Yoshimune, Kenji Haraya
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Publication number: 20100212503Abstract: A hollow fiber carbon membrane is provided, which has excellent gas separation performance, unbreakable flexibility and high utility. The hollow fiber carbon membrane comprises carbonized substance obtained by calcination of a hollow fiber-like material formed from a polyphenylene oxide derivative, and has an external diameter in the range of 0.08 mm to 0.25 mm. The polyphenylene oxide derivative substantially comprises repeating units represented by the following (a) and (b) (in the structural formula, R11 and R12 independently represent hydrogen atom or sulfone group, except that R11 and R12 are both hydrogen atoms), wherein the ratio A (%) of the repeating unit (b) to the repeating units (a)+(b) satisfies 15%<A<60%.Type: ApplicationFiled: July 31, 2008Publication date: August 26, 2010Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Miki Yoshimune, Kenji Haraya
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Publication number: 20100206164Abstract: A gas purification method of the present invention uses a carbon membrane having a molecular sieving action to purify at least one selected from the group consisting of a hydride gas, a hydrogen halide gas, and a halogen gas, each gas containing an impurity at 10 ppm or less. The present invention can be used for a recovery unit that recoveries a used gas to reuse it as an ultrapure semiconductor material gas, and a unit or equipment that produces or charges an ultrapure semiconductor material gas.Type: ApplicationFiled: October 9, 2008Publication date: August 19, 2010Inventors: Yuzuru Miyazawa, Yoshihiko Kobayashi, Kenji Haraya, Miki Yoshimune
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Patent number: 6531569Abstract: This invention relates to resin material for gas separation base containing a cardo polyimide structure in which the hydrogen atoms in the side-chain benzyl and/or allyl position are halogenated at a rate of modification by halogen of 0.Type: GrantFiled: September 21, 2001Date of Patent: March 11, 2003Assignees: National Institute of Advanced Industrial Science and Technology, Research Institute of Innovative Technology for the Earth, Nippon Steel Corporation, Sumitomo Electric Industries, Ltd.Inventors: Akira Tachiki, Hiroshi Mano, Kenji Haraya
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Patent number: 5445669Abstract: A membrane for the separation of carbon dioxide is disclosed which includes a hydrogel film of a cross-linked, vinyl alcohol/acrylic acid salt copolymer impregnated with an aqueous carrier solution containing a carbon dioxide carrier dissolved therein. A composition containing a solvent, an alkali metal carbonate or bicarbonates, and a polydentate ligand capable of forming a complex with an alkali metal ion is suitably used as the carrier solution. This composition may also be used for the preparation of a liquid film of a carbon dioxide separation membrane.Type: GrantFiled: August 9, 1994Date of Patent: August 29, 1995Assignees: Sumitomo Electric Industries, Ltd., Director-General of Agency of Industrial Science and Technology, Research Institute of Innovative Technology for the EarthInventors: Makoto Nakabayashi, Kazuhiro Okabe, Takayuki Mishima, Hiroshi Mano, Kenji Haraya