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: 20140283545Abstract: There is provided a water vapor adsorbent for adsorption heat pumps that has high adsorption and desorption performance and high water resistance, such as submersion resistance. The water vapor adsorbent contains a zeolite that contains at least a silicon atom, an aluminum atom, and a phosphorus atom in its framework structure and that has a framework density of 12.0 T/1,000 cubic angstroms or more and 16.0 T/1,000 cubic angstroms or less, wherein the water vapor adsorbent contains a group 11 metal of the periodic table, which constitutes 0.1% to 15% by weight of the zeolite. In the zeolite containing the group 11 metal, an ion of the group 11 metal substitutes for a Bronsted acid site, which promotes a hydrolysis reaction of the zeolite, and decreases the number of Bronsted acid sites of the zeolite, thereby improving the water resistance, such as submersion resistance, of the zeolite.Type: ApplicationFiled: October 1, 2012Publication date: September 25, 2014Applicant: MITSUBISHI PLASTICS, INC.Inventors: Haijun Chen, Takahiko Takewaki
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Patent number: 8815388Abstract: The invention relates to an inorganic-organic hybrid material which comprises an inorganic component and an organic component, has a content of the inorganic component of 20-80% by mass, and has a refractive index of 1.60 or higher, wherein, when preparing a strip specimen having a thickness of 1,000 ?m, a width of 5 mm and a length of 70 mm by using the inorganic-organic hybrid material and winding the specimen by 180° on a cylindrical metal rod having a diameter of 10 mm at 25° C., the specimen does not crack.Type: GrantFiled: December 26, 2012Date of Patent: August 26, 2014Assignee: Nippon Kasei Chemical Company LimitedInventors: Masanori Yamazaki, Takahiko Takewaki, Ritsuko Yamauchi, Yuuichi Katou, Atsushi Takaki
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Patent number: 8759598Abstract: An object of the present invention is to provide a process of producing propylene by contacting ethylene with a catalyst, where propylene is produced with high selectivity. The present invention relates to a production process of propylene, comprising contacting ethylene with a catalyst, wherein the catalyst comprises a zeolite as an active ingredient and an acid content in the outer surface of the zeolite is 5 % or less based on an acid content of the entire zeolite.Type: GrantFiled: November 8, 2011Date of Patent: June 24, 2014Assignee: Mitsubishi Chemical CorporationInventors: Mikio Hayashi, Masashi Yamaguchi, Yumiko Yoshikawa, Takahiko Takewaki, Tohru Setoyama
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Patent number: 8647999Abstract: A method for manufacturing a catalyst, which comprises regenerating a catalyst comprising a CHA zeolite as an active ingredient and having an ethylene conversion lowered through reaction of producing propylene by bringing into contact with ethylene in a vapor phase, by bringing the catalyst into contact with a gas which does not comprise oxygen and comprises hydrogen having a hydrogen partial pressure of 0.01 MPa or more as an absolute pressure thereof.Type: GrantFiled: February 10, 2012Date of Patent: February 11, 2014Assignee: Mitsubishi Chemical CorporationInventors: Mikio Hayashi, Masahiro Hara, Masashi Yamaguchi, Yumiko Yoshikawa, Takahiko Takewaki, Tohru Setoyama, Naoyuki Sakamoto
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Publication number: 20140010722Abstract: To provide an exhaust gas purification catalyst which has high nitrogen oxide removal performance at both an exhaust gas temperature of 200° C. or lower and an exhaust gas temperature of 500° C. or higher and high durability to the repetitive adsorption and desorption of water vapor. A catalyst contains zeolite having a framework structure containing at least aluminum atoms, phosphorus atoms, and silicon atoms and metal supported on the zeolite. The integrated intensity area of a signal intensity of ?130 ppm to ?92.5 ppm is 41% or more of the integrated intensity area of a signal intensity of ?130 ppm to ?50 ppm in the case of measuring a solid-state 29Si-DD/MAS-NMR spectrum after water adsorption.Type: ApplicationFiled: January 31, 2012Publication date: January 9, 2014Applicant: MITSUBISHI PLASTICS, INC.Inventors: Takeshi Matsuo, Daisuke Nishioka, Takahiko Takewaki, Haijun Chen, Kazunori Oshima
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Publication number: 20130281284Abstract: [Object] To provide a catalyst for nitrogen oxide removal having no degradation problem caused by adsorbed water when a temperature is raised sharply and exhibiting excellent nitrogen oxide removal performance and retentive characteristic thereof. [Solution] A catalyst for nitrogen oxide removal, containing a metal-loading zeolite, wherein the zeolite contains a silicon atom, an aluminum atom, and a phosphorus atom in a framework structure, and the amount of water adsorption of the catalyst at 25° C. and a relative vapor pressure of 0.5 is 0.05 to 0.2 (kg-water/kg-catalyst) or less. A method for manufacturing this catalyst for nitrogen oxide removal, the method including the steps of drying a mixed slurry containing a metal source, the zeolite, and metal oxide particles having an average particle diameter of 0.1 to 10 ?m and/or an inorganic binder and calcining the resulting dry powder.Type: ApplicationFiled: December 26, 2011Publication date: October 24, 2013Applicant: MITSUBISHI PLASTICS, INC.Inventors: Takeshi Matsuo, Takahiko Takewaki, Kazunori Oshima, Haijun Chen, Daisuke Nishioka, Caio Tagusagawa
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Publication number: 20130266785Abstract: A transition-metal-containing silicoaluminophosphate zeolite having excellent high-temperature hydrothermal durability is easily and efficiently produced. A method for producing a transition-metal-containing zeolite that contains a silicon atom, a phosphorus atom, and an aluminum atom in at least its framework structure includes hydrothermal synthesis using an aqueous gel containing a silicon atom raw material, an aluminum atom raw material, a phosphorus atom raw material, a transition metal raw material, and a polyamine (other than diamines). A transition-metal-containing silicoaluminophosphate zeolite produced by hydrothermal synthesis using a zeolite raw material and the aqueous gel containing the transition metal raw material and the polyamine has excellent high-temperature hydrothermal durability and high catalytic activity.Type: ApplicationFiled: June 19, 2012Publication date: October 10, 2013Applicant: MITSUBISHI PLASTICS, INC.Inventors: Haijun Chen, Takahiko Takewaki, Takeshi Matsuo
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Publication number: 20130116362Abstract: The invention relates to an inorganic-organic hybrid material which comprises an inorganic component and an organic component, has a content of the inorganic component of 20-80% by mass, and has a refractive index of 1.60 or higher, wherein, when preparing a strip specimen having a thickness of 1,000 ?m, a width of 5 mm and a length of 70 mm by using the inorganic-organic hybrid material and winding the specimen by 180° on a cylindrical metal rod having a diameter of 10 mm at 25° C., the specimen does not crack.Type: ApplicationFiled: December 26, 2012Publication date: May 9, 2013Inventors: Masanori YAMAZAKI, Takahiko Takewaki, Ritsuko Yamauchi, Yuuichi Katou, Atsushi Takaki
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Patent number: 8376148Abstract: An object of the present invention is to provide a zeolite membrane composite satisfying both the treating amount and the separation performance at a practically sufficient level, which can be applied even in the presence of an organic material and can separate/concentrate an organic material-containing gas or liquid mixture and which is economic without requiring a high energy cost and is not limited in its application range; a production method thereof; and a separation or concentration method using the same. The present invention is an inorganic porous support-zeolite membrane composite, wherein the inorganic porous support contains a ceramic sintered body and the inorganic porous support-zeolite membrane composite has, as a zeolite membrane, a CHA-type zeolite crystal layer on the inorganic porous support surface.Type: GrantFiled: August 26, 2011Date of Patent: February 19, 2013Assignee: Mitsubishi Chemical CorporationInventors: Miki Sugita, Takahiko Takewaki, Kazunori Oshima, Naoko Fujita
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Publication number: 20130005563Abstract: The object is to provide a nitrogen oxide reduction catalyst, which comprises zeolite containing at least a silicon atom, a phosphorus atom and an aluminium atom, and has an adsorption retention rate of at least 80%, when tested in a water vapor cyclic adsorption/desorption test at 90° C. It is also an object to provide a nitrogen oxide reduction device containing the foregoing catalyst on a honeycomb-structure formed article.Type: ApplicationFiled: September 14, 2012Publication date: January 3, 2013Applicant: MITSUBISHI PLASTICS, INC.Inventors: Takeshi Matsuo, Takahiko Takewaki, Daisuke Nishioka, Kazunori Oshima, Haijun Chen, Hiroyuki Kakiuchi
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Patent number: 8333079Abstract: An adsorption heat pump is provided in which water vapor can be efficiently adsorbed and desorbed using a heat source having a lower temperature than ones heretofore in use because the pump employs an adsorbent which has a large difference in water adsorption amount in adsorption/desorption and can be regenerated (release the adsorbate) at a low temperature. The invention provides an adsorption heat pump which comprises an adsorbate, an adsorption/desorption part having an adsorbent for adsorbate adsorption/desorption, a vaporization part for adsorbate vaporization which has been connected to the adsorption/desorption part, and a condensation part for adsorbate condensation which has been connected to the adsorption/desorption part, wherein the adsorbent, when examined at 25° C., gives a water vapor adsorption isotherm which, in the relative vapor pressure range of from 0.05 to 0.30, has a relative vapor pressure region in which a change in relative vapor pressure of 0.Type: GrantFiled: October 1, 2008Date of Patent: December 18, 2012Assignees: Mitsubishi Plastics, Inc., Denso CorporationInventors: Hiroyuki Kakiuchi, Takahiko Takewaki, Masaru Fujii, Masanori Yamazaki, Hideaki Takumi, Hiromu Watanabe, Kouji Inagaki, Atsushi Kosaka, Seiji Inoue, Satoshi Inoue
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Publication number: 20120203048Abstract: A method for manufacturing a catalyst, which comprises regenerating a catalyst comprising a zeolite as an active ingredient and having an ethylene conversion lowered through reaction of producing propylene by bringing into contact with ethylene in a vapor phase, by bringing the catalyst into contact with a gas which does not comprise oxygen and comprises hydrogen having a hydrogen partial pressure of 0.01 MPa or more as an absolute pressure thereof.Type: ApplicationFiled: February 10, 2012Publication date: August 9, 2012Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Mikio HAYASHI, Masahiro HARA, Masashi YAMAGUCHI, Yumiko YOSHIKAWA, Takahiko TAKEWAKI, Tohru SETOYAMA, Naoyuki SAKAMOTO
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Publication number: 20120059139Abstract: An object of the present invention is to provide a process of producing propylene by contacting ethylene with a catalyst, where propylene is produced with high selectivity. The present invention relates to a production process of propylene, comprising contacting ethylene with a catalyst, wherein the catalyst comprises a zeolite as an active ingredient and an acid content in the outer surface of the zeolite is 5% or less based on an acid content of the entire zeolite.Type: ApplicationFiled: November 8, 2011Publication date: March 8, 2012Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Mikio HAYASHI, Masashi Yamaguchi, Yumiko Yoshikawa, Takahiko Takewaki, Tohru Setoyama
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Publication number: 20120028789Abstract: The object is to provide an exhaust gas reduction catalyst that exhibit high nitrogen oxide reduction performance, and to provide a simple and efficient method for producing the catalyst, in which the amount of the waste liquid is reduced, further, an object of the invention is to provide a zeolite-containing catalyst for reducing nitrogen oxides, which does not use an expensive noble metal or the like and which has high nitrogen oxide reduction performance.Type: ApplicationFiled: July 25, 2011Publication date: February 2, 2012Applicant: MITSUBISHI PLASTICS, INC.Inventors: Takeshi MATSUO, Takahiko Takewaki, Daisuke Nishioka, Kazunori Oshima, Haijun Chen, Hiroyuki Kakiuchi
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Publication number: 20120024777Abstract: An object of the present invention is to provide a zeolite membrane composite satisfying both the treating amount and the separation performance at a practically sufficient level, which can be applied even in the presence of an organic material and can separate/concentrate an organic material-containing gas or liquid mixture and which is economic without requiring a high energy cost and is not limited in its application range; a production method thereof; and a separation or concentration method using the same. The present invention is an inorganic porous support-zeolite membrane composite, wherein the inorganic porous support contains a ceramic sintered body and the inorganic porous support-zeolite membrane composite has, as a zeolite membrane, a CHA-type zeolite crystal layer on the inorganic porous support surface.Type: ApplicationFiled: August 26, 2011Publication date: February 2, 2012Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Miki Sugita, Takahiko Takewaki, Kazunori Oshima, Naoko Fujita
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Publication number: 20120020875Abstract: The object is to provide an exhaust gas reduction catalyst that exhibit high nitrogen oxide reduction performance, and to provide a simple and efficient method for producing the catalyst, in which the amount of the waste liquid is reduced, further, an object of the invention is to provide a zeolite-containing catalyst for reducing nitrogen oxides, which does not use an expensive noble metal or the like and which has high nitrogen oxide reduction performance.Type: ApplicationFiled: July 22, 2011Publication date: January 26, 2012Applicant: MITSUBISHI PLASTICS, INC.Inventors: Takeshi MATSUO, Takahiko Takewaki, Daisuke Nishioka, Kazunori Oshima, Haijun Chen, Hiroyuki Kakiuchi
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Patent number: 7527777Abstract: Subjects for the invention are to provide a zeolite reduced in performance deterioration in repetitions of use or during long-term use and a process for producing the same and to provide an adsorbent comprising the zeolite and a heat utilization system or the like employing the adsorbent. The invention relates to a zeolite which has a framework density of from 10 T/nm3 to 16 T/nm3 and a carbon content of from 1% by weight to 6% by weight and satisfies the following (1) or (2): (1) the zeolite is an aluminophosphate which has a nitrogen content of from 0.5% by weight to 12% by weight and in which the aluminum may be partly replaced by Me; (2) the zeolite is a silicoaluminophosphate in which the aluminum may be partly replaced by Me and which, when burned to a carbon content lower than 0.Type: GrantFiled: December 20, 2005Date of Patent: May 5, 2009Assignee: Mitsubishi Chemical CorporationInventors: Hiromu Watanabe, Takahiko Takewaki, Masanori Yamazaki, Hiroyuki Kakiuchi, Kouji Inagaki, Atsushi Kosaka, Norikazu Hosokawa
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Patent number: 7497089Abstract: An adsorption heat pump is provided in which water vapor can be efficiently adsorbed and desorbed using a heat source having a lower temperature than ones heretofore in use because the pump employs an adsorbent which has a large difference in water adsorption amount in adsorption/desorption and can be regenerated (release the adsorbate) at a low temperature. The invention provides an adsorption heat pump which comprises an adsorbate, an adsorption/desorption part having an adsorbent for adsorbate adsorption/desorption, a vaporization part for adsorbate vaporization which has been connected to the adsorption/desorption part, and a condensation part for adsorbate condensation which has been connected to the adsorption/desorption part, wherein the adsorbent, when examined at 25° C., gives a water vapor adsorption isotherm which, in the relative vapor pressure range of from 0.05 to 0.30, has a relative vapor pressure region in which a change in relative vapor pressure of 0.Type: GrantFiled: August 21, 2003Date of Patent: March 3, 2009Assignees: Mitsubishi Chemical Corporation, Denso CorporationInventors: Hiroyuki Kakiuchi, Takahiko Takewaki, Masaru Fujii, Masanori Yamazaki, Hideaki Takumi, Hiromu Watanabe, Kouji Inagaki, Atsushi Kosaka, Seiji Inoue, Satoshi Inoue
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Publication number: 20090025403Abstract: An adsorption heat pump is provided in which water vapor can be efficiently adsorbed and desorbed using a heat source having a lower temperature than ones heretofore in use because the pump employs an adsorbent which has a large difference in water adsorption amount in adsorption/desorption and can be regenerated (release the adsorbate) at a low temperature. The invention provides an adsorption heat pump which comprises an adsorbate, an adsorption/desorption part having an adsorbent for adsorbate adsorption/desorption, a vaporization part for adsorbate vaporization which has been connected to the adsorption/desorption part, and a condensation part for adsorbate condensation which has been connected to the adsorption/desorption part, wherein the adsorbent, when examined at 25° C., gives a water vapor adsorption isotherm which, in the relative vapor pressure range of from 0.05 to 0.30, has a relative vapor pressure region in which a change in relative vapor pressure of 0.Type: ApplicationFiled: October 1, 2008Publication date: January 29, 2009Applicants: MITSUBISHI CHEMICAL, CORPORATION, DENSO CORPORATIONInventors: Hiroyuki Kakiuchi, Takahiko Takewaki, Masaru Fujii, Masanori Yamazaki, Hideaki Takumi, Hiromu Watanabe, Kouji Inagaki, Atsushi Kosaka, Seiji Inoue, Satoshi Inoue
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Patent number: 7422993Abstract: The present invention provides an adsorbent for adsorption heat pump and humidity-control air conditioner, which is capable of adsorbing an adsorbate therein and desorbing the adsorbate therefrom in a narrow relative vapor pressure range, and can be regenerated (desorption) at a low temperature. Also, the present invention provides an adsorption heat pump and humidity-control air conditioner using the adsorbent which can be effectively operated even by a low-temperature heat source, as well as methods of operating the adsorption heat pump and humidity-control air conditioner by effectively utilizing low-temperature exhaust heat. The absorbent of the present invention comprises zeolite containing (i) aluminum, (ii) phosphorus and (iii) iron and/or gallium in a skeletal structure thereof, which is substantially free from change in structure upon subjecting the adsorbent to adsorption and desorption of water vapor.Type: GrantFiled: September 27, 2005Date of Patent: September 9, 2008Assignee: Mitsubishi Chemical CorporationInventors: Takahiko Takewaki, Masanori Yamazaki, Hiromu Watanabe, Hiroyuki Kakiuchi, Eri Kanamori, Shigeru Terada, Miki Iwade