Patents by Inventor Takahiko Takewaki
Takahiko Takewaki 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: 20250018349Abstract: An object of an aspect of the present invention is to provide a new organic-inorganic hybrid membrane composite excellent in permeance and a relevant technique thereof. An organic-inorganic hybrid membrane composite in an aspect of the present invention includes a porous support layer and an organic-inorganic hybrid membrane formed on the porous support layer, an air permeation amount is 10000 L/(m2·h) or less, the organic-inorganic hybrid membrane contains a matrix polymer and a gas-selective inorganic filler, a contained amount of the gas-selective inorganic filler relative to the organic-inorganic hybrid membrane is 35% by mass or more, the gas-selective inorganic filler contains zeolite, a framework density in a case where all T elements of the zeolite are silicon is 16.0 T/1000 ?3 or less, and a membrane thickness of the organic-inorganic hybrid membrane is 0.05 ?m or more and 50 ?m or less.Type: ApplicationFiled: September 20, 2024Publication date: January 16, 2025Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Miki YAMADA, Takahiko TAKEWAKI, Kanako ITO, Chie NAKANO MATSUNAGA, Saki MORIYA, Kouhei TAKATANI, Hiroe KOZAI, Takaharu NISHIYAMA
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Publication number: 20240375043Abstract: A composite separation structure may include a substrate section, a first separation section disposed in contact with the substrate section, and a second separation section disposed not in contact with the substrate section but in contact with the first separation section. The second separation section may be amorphous and have a thickness from an end portion in contact with the first separation section to the opposite end portion of 5 nm or more and 200 nm or less. Such a composite separation structure may be capable of separating gases having various small kinetic diameters (kinetic diameters) with high separability, and particularly capable of realizing the separation or concentration of a gas mixture containing a gas having a kinetic diameter of 4 ? or less.Type: ApplicationFiled: July 19, 2024Publication date: November 14, 2024Applicants: Mitsubishi Chemical Corporation, JAPAN TECHNOLOGICAL RESEARCH ASSOCIATION OF ARTIFICIAL PHOTOSYNTHETIC CHEMICAL PROCESSInventors: Kiminori SATOU, Hideyoshi HORIE, Tomohisa KIKUCHI, Hidekazu MIYAGI, Mikio HAYASHI, Takahiko TAKEWAKI
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Patent number: 12048904Abstract: A zeolite membrane composite for use in separation of a highly-permeative component through permeation from a vapor mixture or a liquid mixture comprising multiple components, the zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided thereon, wherein the zeolite membrane contains zeolite of a CHA-type aluminosilicate, and in a X-ray diffraction pattern obtained through irradiation to the zeolite membrane surface with X-ray, a peak intensity at around 2?=17.90 has a value of less than 0.5 times a peak intensity at around 2?=20.80 and a peak intensity at around 2?=9.6° has a value of 2.0 times or more and less than 4.0 times a peak intensity at around 2?=20.8°.Type: GrantFiled: July 30, 2018Date of Patent: July 30, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Mikio Hayashi, Miki Yamada, Takahiko Takewaki
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Publication number: 20230265297Abstract: A liquid composition including a resin and an inorganic filler, wherein the inorganic filler comprises a zeolite having a particle size of 1.0 ?m or more and 10 ?m or less and a small particle size inorganic filler having a particle size of 0.1 ?m or more and less than 1.0 ?m.Type: ApplicationFiled: May 2, 2023Publication date: August 24, 2023Applicant: Mitsubishi Chemical CorporationInventors: Ryohji OHNISHI, Chie MATSUNAGA, Noriko KATAGIRI, Masashi IKEDA, Jun MATSUI, Takahiko TAKEWAKI
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Patent number: 11141703Abstract: An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 ?m or less on average.Type: GrantFiled: June 19, 2019Date of Patent: October 12, 2021Assignee: Mitsubishi Chemical CorporationInventors: Ayuko Onozuka, Miki Yamada, Mikio Hayashi, Takahiko Takewaki
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Publication number: 20210308632Abstract: An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 ?m or less on average.Type: ApplicationFiled: June 16, 2021Publication date: October 7, 2021Applicant: Mitsubishi Chemical CorporationInventors: Ayuko ONOZUKA, Miki YAMADA, Mikio HAYASHI, Takahiko TAKEWAKI
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Patent number: 11090617Abstract: A porous support-zeolite membrane composite comprising an inorganic porous support and a zeolite membrane provided on, wherein the zeolite membrane contains a zeolite having a microporous structure of 8-membered oxygen ring or less, and a molar ratio of SiO2/Al2O3 in the zeolite membrane surface is larger by at least 20 than a molar ratio of SiO2/Al2O3 in the zeolite membrane itself, or a water adsorption of the porous support-zeolite membrane composite at a relative pressure of 0.8, as determined from a water vapor adsorption isotherm of the porous support-zeolite membrane composite, is at least 82% of a water adsorption of the porous support-zeolite membrane composite under the same condition as above after one-week immersion of the porous support-zeolite membrane composite in an aqueous 90 mass % acetic acid solution at room temperature.Type: GrantFiled: August 25, 2014Date of Patent: August 17, 2021Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Miki Yamada, Takahiko Takewaki, Mikio Hayashi, Naoko Fujita, Hidekazu Miyagi
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Patent number: 11084025Abstract: Provided is a method for producing an inexpensive, high-performance AEI type zeolite and an AEI type zeolite having a Si/Al ratio of 6.5 or less and an acidity of 1.2 mmol/g or more and 3.0 mmol/g or less, by using neither an expensive Y type zeolite as a raw material nor dangerous hydrofluoric acid. The method for producing an AEI type zeolite having a Si/Al ratio of 50 or less includes: preparing a mixture including a silicon atom material, an aluminum atom material, an alkali metal atom material, an organic structure-directing agent, and water; and performing hydrothermal synthesis of the obtained mixture, in which a compound having a Si content of 20% by weight or less and containing aluminum is used as the aluminum atom material; and the mixture includes a zeolite having a framework density of 14 T/1000 ?3 or more in an amount of 0.1% by weight or more with respect to SiO2 assuming that all Si atoms in the mixture are formed in SiO2.Type: GrantFiled: June 12, 2019Date of Patent: August 10, 2021Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Manabu Tanaka, Takahiko Takewaki, Takeshi Matsuo, Masahiro Hara
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Patent number: 11065586Abstract: The present invention relates to a process for producing a porous support-zeolite membrane composite, which comprises forming a CHA type zeolite membrane on a porous support by a hydrothermal synthesis in the presence of seed crystals, wherein an FAU type zeolite is used as the seed crystals.Type: GrantFiled: July 29, 2019Date of Patent: July 20, 2021Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Nobutake Tanabe, Takahiko Takewaki, Miki Yamada, Kouhei Takatani
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Patent number: 11028031Abstract: The present invention aims at providing a method for producing a high-concentration alcohol from a water-alcohol mixture, in which the overall process is efficient and the present invention relates to a production method of a high-concentration alcohol, including a water adsorption step of adsorbing water of a water-alcohol mixture on an adsorption column to obtain a first concentrated alcohol, a water desorption step of introducing an alcohol to obtain a hydrous alcohol, and a membrane separation step of introducing the hydrous alcohol into a membrane separation unit provided with a membrane composite containing zeolite having an SiO2/Al2O3 molar ratio of 5 to 15 to obtain a second concentrated alcohol.Type: GrantFiled: May 9, 2019Date of Patent: June 8, 2021Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Kazuhide Maeda, Koichi Yamazaki, Hiroyuki Kakiuchi, Takeshi Tahara, Takahiko Takewaki
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Patent number: 10953364Abstract: The present invention addresses the problem of providing a technology for efficiently separating carbon dioxide in a method for separating carbon dioxide from a mixed gas by using a membrane separation method. The problem is solved by a method including supplying a mixed gas to a separation membrane module to separate carbon dioxide from the mixed gas, in which the mixed gas is supplied to the separation membrane module at a high linear velocity in order to sufficiently mix a mixed gas in the vicinity of a membrane.Type: GrantFiled: September 4, 2018Date of Patent: March 23, 2021Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Mikio Hayashi, Takahiko Takewaki, Nobuhiko Ueno
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Publication number: 20200047168Abstract: This transition metal-loaded zeolite is configured such that an absorption intensity ratio in a specific region of the transition metal-loaded zeolite observed by ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR) and an intensity ratio of a maximum peak in a different temperature range of the transition metal-loaded zeolite measured by ammonia temperature-programmed desorption, respectively fall within specific ranges.Type: ApplicationFiled: March 12, 2018Publication date: February 13, 2020Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Yuusuke HOTTA, Manabu TANAKA, Takahiko TAKEWAKI, Takeshi MATSUO
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Publication number: 20190344223Abstract: The present invention relates to a process for producing a porous support-zeolite membrane composite, which comprises forming a CHA type zeolite membrane on a porous support by a hydrothermal synthesis in the presence of seed crystals, wherein an FAU type zeolite is used as the seed crystals.Type: ApplicationFiled: July 29, 2019Publication date: November 14, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Nobutake Tanabe, Takahiko Takewaki, Miki Yamada, Kouhei Takatani
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Publication number: 20190321810Abstract: Provided is a method for producing an inexpensive, high-performance AEI type zeolite and an AEI type zeolite having a Si/Al ratio of 6.5 or less by using neither an expensive Y type zeolite as a raw material nor dangerous hydrofluoric acid. The method for producing an AEI type zeolite having a Si/Al ratio of 50 or less includes: preparing a mixture including a silicon atom material, an aluminum atom material, an alkali metal atom material, an organic structure-directing agent, and water; and performing hydrothermal synthesis of the obtained mixture, in which a compound having a Si content of 20% by weight or less and containing aluminum is used as the aluminum atom material; and the mixture includes a zeolite having a framework density of 14 T/1000 ?3 or more in an amount of 0.1% by weight or more with respect to SiO2 assuming that all Si atoms in the mixture are formed in SiO2.Type: ApplicationFiled: June 12, 2019Publication date: October 24, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Manabu TANAKA, Takahiko Takewaki, Takeshi Matsuo, Masahiro Hara
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Publication number: 20190299167Abstract: An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 ?m or less on average.Type: ApplicationFiled: June 19, 2019Publication date: October 3, 2019Applicant: Mitsubishi Chemical CorporationInventors: Ayuko ONOZUKA, Miki YAMADA, Mikio HAYASHI, Takahiko TAKEWAKI
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Patent number: 10406486Abstract: The present invention relates to a process for producing a porous support-zeolite membrane composite, which comprises forming a CHA type zeolite membrane on a porous support by a hydrothermal synthesis in the presence of seed crystals, wherein an FAU type zeolite is used as the seed crystals.Type: GrantFiled: October 18, 2016Date of Patent: September 10, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Nobutake Tanabe, Takahiko Takewaki, Miki Yamada, Kouhei Takatani
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Publication number: 20190263741Abstract: The present invention aims at providing a method for producing a high-concentration alcohol from a water-alcohol mixture, in which the overall process is efficient and the present invention relates to a production method of a high-concentration alcohol, including a water adsorption step of adsorbing water of a water-alcohol mixture on an adsorption column to obtain a first concentrated alcohol, a water desorption step of introducing an alcohol to obtain a hydrous alcohol, and a membrane separation step of introducing the hydrous alcohol into a membrane separation unit provided with a membrane composite containing zeolite having an SiO2/Al2O3 molar ratio of 5 to 15 to obtain a second concentrated alcohol.Type: ApplicationFiled: May 9, 2019Publication date: August 29, 2019Applicants: MITSUBISHI CHEMICAL CORPORATION, MITSUBISHI CHEMICAL ENGINEERING CORPORATIONInventors: Kazuhide MAEDA, Koichi YAMAZAKI, Hiroyuki KAKIUCHI, Takeshi TAHARA, Takahiko TAKEWAKI
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Patent number: 10369528Abstract: An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 ?m or less on average.Type: GrantFiled: May 23, 2017Date of Patent: August 6, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Ayuko Onozuka, Miki Yamada, Mikio Hayashi, Takahiko Takewaki
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Patent number: 10357760Abstract: Provided is a method for producing an inexpensive, high-performance AEI type zeolite and an AEI type zeolite having a Si/Al ratio of 6.5 or less by using neither an expensive Y type zeolite as a raw material nor dangerous hydrofluoric acid. The method for producing an AEI type zeolite having a Si/Al ratio of 50 or less includes: preparing a mixture including a silicon atom material, an aluminum atom material, an alkali metal atom material, an organic structure-directing agent, and water; and performing hydrothermal synthesis of the obtained mixture, in which a compound having a Si content of 20% by weight or less and containing aluminum is used as the aluminum atom material; and the mixture includes a zeolite having a framework density of 14 T/1000 ?3 or more in an amount of 0.1% by weight or more with respect to SiO2 assuming that all Si atoms in the mixture are formed in SiO2.Type: GrantFiled: May 22, 2017Date of Patent: July 23, 2019Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Manabu Tanaka, Takahiko Takewaki, Takeshi Matsuo, Masahiro Hara
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Patent number: 10329229Abstract: The present invention aims at providing a method for producing a high-concentration alcohol from a water-alcohol mixture, in which the overall process is efficient and the present invention relates to a production method of a high-concentration alcohol, including a water adsorption step of adsorbing water of a water-alcohol mixture on an adsorption column to obtain a first concentrated alcohol, a water desorption step of introducing an alcohol to obtain a hydrous alcohol, and a membrane separation step of introducing the hydrous alcohol into a membrane separation unit provided with a membrane composite containing zeolite having an SiO2/Al2O3 molar ratio of 5 to 15 to obtain a second concentrated alcohol.Type: GrantFiled: March 30, 2017Date of Patent: June 25, 2019Assignees: MITSUBISHI CHEMICAL CORPORATION, Mitsubishi Chemical Engineering CorporationInventors: Kazuhide Maeda, Koichi Yamazaki, Hiroyuki Kakiuchi, Takeshi Tahara, Takahiko Takewaki