Patents by Inventor Morimitsu Nakamura
Morimitsu Nakamura 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: 9651302Abstract: A purification method for feed air in cryogenic air separation of the present invention includes purifying the feed air for the cryogenic air separation by using a temperature swing adsorption method, wherein the whole region of a carbon dioxide adsorbent layer packed in an adsorption column is used as a mass transfer zone of a carbon dioxide. Also, a purification apparatus for feed air in cryogenic air separation of the present invention includes at least two adsorption columns; and a moisture adsorbent and a carbon dioxide adsorbent being laminated and packed in the adsorption columns, wherein the packed amount of the carbon dioxide adsorbent is the same as the amount of the carbon dioxide adsorbent in the region of the carbon dioxide adsorbent which a mass transfer zone of a carbon dioxide occupies at the end of an adsorption step, and a temperature swing adsorption method is used.Type: GrantFiled: December 12, 2006Date of Patent: May 16, 2017Assignee: TAIYO NIPPON SANSO CORPORATIONInventors: Masato Kawai, Morimitsu Nakamura
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Patent number: 8690990Abstract: A pre-purification method of feed air for cryogenic air separation, which includes; (a) an adsorption step wherein a compressed feed air is supplied in an adsorption column, wherein a moisture adsorbent and a carbon dioxide adsorbent are filled in this order from the side where the feed air is introduced in the column, to remove water and carbon dioxide from the feed air; (b) a decompression step wherein pressure in the adsorption column is reduced; (c) a heating step wherein the adsorbents in the decompressed column are heated and regenerated, and the heating step includes a total heating step wherein the moisture adsorbent and the carbon dioxide adsorbent are heated and a partial heating step wherein the moisture adsorbent is heated; (d) a cooling step wherein the adsorbents are cooled by introducing a purge gas, which is not heated, to the adsorption column; and (e) a pressurization step wherein the cooled adsorbents are pressurized by purified air.Type: GrantFiled: February 25, 2010Date of Patent: April 8, 2014Assignee: Taiyo Nippon Sanso CorporationInventors: Morimitsu Nakamura, Masato Kawai, Hiroyuki Takei
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Patent number: 8366806Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure having a Si/Al ratio of no more than 20. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.Type: GrantFiled: December 29, 2010Date of Patent: February 5, 2013Assignee: Taiyo Nippon Sanso CorporationInventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
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Publication number: 20120011887Abstract: A pre-purification method of feed air for cryogenic air separation, which includes; (a) an adsorption step wherein a compressed feed air is supplied in an adsorption column, wherein a moisture adsorbent and a carbon dioxide adsorbent are filled in this order from the side where the feed air is introduced in the column, to remove water and carbon dioxide from the feed air; (b) a decompression step wherein pressure in the adsorption column is reduced; (c) a heating step wherein the adsorbents in the decompressed column are heated and regenerated, and the heating step includes a total heating step wherein the moisture adsorbent and the carbon dioxide adsorbent are heated and a partial heating step wherein the moisture adsorbent is heated; (d) a cooling step wherein the adsorbents are cooled by introducing a purge gas, which is not heated, to the adsorption column; and (e) a pressurization step wherein the cooled adsorbents are pressurized by purified air.Type: ApplicationFiled: February 25, 2010Publication date: January 19, 2012Inventors: Morimitsu Nakamura, Masato Kawai, Hiroyuki Takei
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Patent number: 7993431Abstract: A gas purifier of the present invention includes a purifier in which a gas-purifying agent is packed, wherein a gas is fed into the purifier, and impurities in the gas are removed by a thermal swing adsorption method, in which an amount A of the gas-purifying agent is determined such that an impurities-removing capacity possessed by half of the amount A of the gas-purifying agent is equal to the total amount of impurities in the gas to be purified in one purification step, and the amount of the gas-purifying agent packed in the purifier is the amount A or more.Type: GrantFiled: June 14, 2006Date of Patent: August 9, 2011Assignee: Taiyo Nippon Sanso CorporationInventors: Morimitsu Nakamura, Masato Kawai
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Publication number: 20110126706Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.Type: ApplicationFiled: December 29, 2010Publication date: June 2, 2011Applicant: TAIYO NIPPON SANSO CORPORATIONInventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
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Patent number: 7931736Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.Type: GrantFiled: March 29, 2005Date of Patent: April 26, 2011Assignee: Taiyo Nippon Sanso CorporationInventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
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Patent number: 7749306Abstract: A method of restarting a TSA apparatus includes, in the case where the TSA apparatus was stopped when or after when a temperature of a purge gas which flows out from a first adsorption column (5a) during a regeneration process became a peak temperature, in the first adsorption column (5a), closing an entrance valve, an exit valve, and an atmosphere-releasing valve; in a second adsorption column (5b) during an adsorption process, closing an entrance valve and an exit valve and opening an atmosphere-releasing valve so as to release a gas in the opposite direction to feed air flow, followed by closing the atmosphere-releasing valve; pressurizing, just before a restart, the second adsorption column (5b) with feed air to a pressure necessary for the adsorption process; and performing, after the restart, the regeneration process and the adsorption process continuously from the time point of stopping the TSA apparatus.Type: GrantFiled: March 29, 2005Date of Patent: July 6, 2010Assignee: Taiyo Nippon Sanso CorporationInventors: Morimitsu Nakamura, Masato Kawai
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Publication number: 20090282866Abstract: A purification method for feed air in cryogenic air separation of the present invention includes purifying the feed air for the cryogenic air separation by using a temperature swing adsorption method, wherein the whole region of a carbon dioxide adsorbent layer packed in an adsorption column is used as a mass transfer zone of a carbon dioxide. Also, a purification apparatus for feed air in cryogenic air separation of the present invention includes at least two adsorption columns; and a moisture adsorbent and a carbon dioxide adsorbent being laminated and packed in the adsorption columns, wherein the packed amount of the carbon dioxide adsorbent is the same as the amount of the carbon dioxide adsorbent in the region of the carbon dioxide adsorbent which a mass transfer zone of a carbon dioxide occupies at the end of an adsorption step, and a temperature swing adsorption method is used.Type: ApplicationFiled: December 12, 2006Publication date: November 19, 2009Inventors: Masato Kawai, Morimitsu Nakamura
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Publication number: 20090151558Abstract: A gas purifier of the present invention includes a purifier in which a gas-purifying agent is packed, wherein a gas is fed into the purifier, and impurities in the gas are removed by a thermal swing adsorption method, in which an amount A of the gas-purifying agent is determined such that an impurities-removing capacity possessed by half of the amount A of the gas-purifying agent is equal to the total amount of impurities in the gas to be purified in one purification step, and the amount of the gas-purifying agent packed in the purifier is the amount A or more.Type: ApplicationFiled: June 14, 2006Publication date: June 18, 2009Inventors: Morimitsu Nakamura, Masato Kawai
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Publication number: 20070209518Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.Type: ApplicationFiled: March 29, 2005Publication date: September 13, 2007Inventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
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Publication number: 20070193446Abstract: A method of restarting a TSA apparatus includes, in the case where the TSA apparatus was stopped when or after when a temperature of a purge gas which flows out from a first adsorption column (5a) during a regeneration process became a peak temperature, in the first adsorption column (5a), closing an entrance valve, an exit valve, and an atmosphere-releasing valve; in a second adsorption column (5b) during an adsorption process, closing an entrance valve and an exit valve and opening an atmosphere-releasing valve so as to release a gas in the opposite direction to feed air flow, followed by closing the atmosphere-releasing valve; pressurizing, just before a restart, the second adsorption column (5b) with feed air to a pressure necessary for the adsorption process; and performing, after the restart, the regeneration process and the adsorption process continuously from the time point of stopping the TSA apparatus.Type: ApplicationFiled: March 29, 2005Publication date: August 23, 2007Inventors: Morimitsu Nakamura, Masato Kawai
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Patent number: 6824588Abstract: An apparatus and a method for purifying the air used in cryogenic air separation are described, which are capable of effectively removing nitrogen oxides and/or hydrocarbons. The apparatus comprises an adsorber comprising an adsorption cylinder that has a first adsorbing layer and a second adsorbing layer therein. The first adsorbing layer is composed of a first adsorbent capable of selectively adsorbing water in the air. The second adsorbing layer is composed of a second adsorbent capable of selectively adsorbing nitrogen oxide and/or hydrocarbon in the air passing the first adsorbing layer, wherein the second adsorbent comprises an X zeolite containing magnesium ion as an ion-exchangeable cation.Type: GrantFiled: July 23, 2002Date of Patent: November 30, 2004Assignee: Nippon Sanso CorporationInventors: Morimitsu Nakamura, Kazuhiko Fujie, Yasuo Tatsumi, Masato Kawai
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Patent number: 6660240Abstract: The present invention relates to a gas processing agent for removing carbon monoxide, hydrogen, carbon dioxide and water vapor in a gas at the same time, which can maintain a high oxidation activity and have a long life time, a manufacturing method therefor and a gas purification method. More specifically, the present invention relates to a gas processing agent made of a catalyst made of an inorganic porous material layer containing at least one selected from a group consisting of platinum, palladium, rhodium and ruthenium, or oxides thereof and an adsorbent, and a manufacturing method therefor, a gas purifier, a gas purification method and a gas purification apparatus using the gas processing agent.Type: GrantFiled: June 1, 2000Date of Patent: December 9, 2003Assignees: N.E. Chemcat Corporaiton, Nippon Sanso CorporationInventors: Sakurai Toshihiko, Yusuke Nakaya, Masato Kawai, Morimitsu Nakamura, Nobuhiro Okamura
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Publication number: 20030029314Abstract: An apparatus and a method for purifying the air used in cryogenic air separation are described, which are capable of effectively removing nitrogen oxides and/or hydrocarbons. The apparatus comprises an adsorber comprising an adsorption cylinder that has a first adsorbing layer and a second adsorbing layer therein. The first adsorbing layer is composed of a first adsorbent capable of selectively adsorbing water in the air. The second adsorbing layer is composed of a second adsorbent capable of selectively adsorbing nitrogen oxide and/or hydrocarbon in the air passing the first adsorbing layer, wherein the second adsorbent comprises an X zeolite containing magnesium ion as an ion-exchangeable cation.Type: ApplicationFiled: July 23, 2002Publication date: February 13, 2003Inventors: Morimitsu Nakamura, Kazuhiko Fujie, Yasuo Tatsumi, Masato Kawai
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Patent number: 6471749Abstract: The present invention relates to a gas purification method for adsorbing and removing impurities by PSA method combined with heating, capable of removing water vapor and carbon dioxide in an economical and effective way.Type: GrantFiled: May 8, 2000Date of Patent: October 29, 2002Assignee: Nippon Sanso CorporationInventors: Masato Kawai, Morimitsu Nakamura, Shigeo Tooyama
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Patent number: 6048509Abstract: A method is provided for removing water, carbon monoxide and carbon dioxide out of a gas, such as air, by passing the gas through a packed column so that the gas sequentially contacts a catalyst consisting of platinum or palladium and at least one member selected from the group consisting of iron, cobalt, nickel, manganese, copper, chromium, tin, lead and cerium wherein the catalyst is supported on alumina containing substantially no pores having pore diameters of 110 Angstroms or less under conditions which oxidize the carbon monoxide in the gas into carbon dioxide; an adsorbent selected from the group consisting of silica gel, activated alumina, zeolite and combinations thereof under conditions in which water is adsorbed and removed from the gas and an adsorbent selected from the group consisting of calcium ion exchanged A zeolite; calcium ion exchanged X zeolite; sodium ion exchanged X zeolite and mixtures thereof under conditions which carbon dioxide is adsorbed and removed from the gas.Type: GrantFiled: May 26, 1998Date of Patent: April 11, 2000Assignee: Nippon Sanso CorporationInventors: Masato Kawai, Morimitsu Nakamura, Nobuhiro Okamura
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Patent number: 5689974Abstract: The present invention offers a pre-purification method and apparatus for an air cryogenic separation plant for removing water vapor and carbon dioxide from feed air, which is able to operate at high air temperatures without the use of special installations such as pre-cooling equipment or demoisturizers to replace freon refrigerators or water spray cooling columns. One aspect of the present invention is a pre-purification method for an air cryogenic separation plant which continuously purifies feed air using a plurality of reciprocally-used adsorption columns 5a, 5b filled with adsorbents for adsorption removal of water vapor and carbon dioxide from the feed air. The method includes an adsorption step, a depressurization step, a heating step, a cooling step, and a repressurization step, whereof the adsorption step for adsorption removal of impurities is performed by feeding pressurized feed air at a temperature of 10.degree..about.45.degree. C.Type: GrantFiled: May 24, 1996Date of Patent: November 25, 1997Assignee: Nippon Sanso CorporationInventors: Atsushi Fujita, Morimitsu Nakamura