Patents by Inventor Toshio Koyanagi
Toshio Koyanagi 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: 9446353Abstract: An object of the present invention is to provide a catalyst for treating exhaust gas adapted not only to remove CO and VOCs based on unsaturated hydrocarbons such as C2H4 but also to accelerate a decomposition reaction of saturated hydrocarbons such as propane and to provide a method for producing such a catalyst for treating exhaust gas. The present invention provides a catalyst for treating an exhaust gas containing carbon monoxide and volatile organic compounds, the catalyst comprising a substrate containing a NOx removal catalyst component and a porous inorganic compound layer containing a noble metal, the layer being applied to the substrate.Type: GrantFiled: February 12, 2007Date of Patent: September 20, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Patent number: 8910468Abstract: An exhaust gas treatment catalyst for removal of one or more pollutants in an exhaust gas, the catalyst comprising: a SO3-reducing catalyst powder which removes the above-described pollutants; and a diluent powder which is not the SO3-reducing catalyst powder nor a catalyst for reactions between exhaust gas components and a reagent, wherein the SO3-reducing catalyst powder is dispersed in the diluent powder.Type: GrantFiled: February 4, 2009Date of Patent: December 16, 2014Assignees: Mitsubishi Heavy Industries, Ltd., Cormetech, Inc.Inventors: Yoshiaki Obayashi, Katsumi Nochi, Toshio Koyanagi, Chris E. Difrancesco
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Patent number: 8440141Abstract: It is intended to provide an exhaust gas treatment system, which allows for VOC removal at lower temperatures and thereby improves the durability of catalysts and suppresses carbon monoxide generation at the final outlet of the system. The present invention provides a treatment system of an exhaust gas containing a nitrogen oxide, carbon monoxide, and a volatile organic compound comprising: an exhaust gas treatment means for removing the nitrogen oxide by reduction with ammonia and partially oxidizing the VOC to CO; and a CO/VOC removal means for oxidizing the CO and partially unreacted VOC, in this order from the upstream flow of the exhaust gas.Type: GrantFiled: October 14, 2011Date of Patent: May 14, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Publication number: 20120087839Abstract: It is intended to provide an exhaust gas treatment system, which allows for VOC removal at lower temperatures and thereby improves the durability of catalysts and suppresses carbon monoxide generation at the final outlet of the system. The present invention provides a treatment system of an exhaust gas containing a nitrogen oxide, carbon monoxide, and a volatile organic compound comprising: an exhaust gas treatment means for removing the nitrogen oxide by reduction with ammonia and partially oxidizing the VOC to CO; and a CO/VOC removal means for oxidizing the CO and partially unreacted VOC, in this order from the upstream flow of the exhaust gas.Type: ApplicationFiled: October 14, 2011Publication date: April 12, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Patent number: 8124021Abstract: It is intended to provide an exhaust gas treatment system, which allows for VOC removal at lower temperatures and thereby improves the durability of catalysts and suppresses carbon monoxide generation at the final outlet of the system. The present invention provides a treatment system of an exhaust gas containing a nitrogen oxide, carbon monoxide, and a volatile organic compound comprising: an exhaust gas treatment means for removing the nitrogen oxide by reduction with ammonia and partially oxidizing the VOC to CO; and a CO/VOC removal means for oxidizing the CO and partially unreacted VOC, in this order from the upstream flow of the exhaust gas.Type: GrantFiled: February 13, 2007Date of Patent: February 28, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Publication number: 20100192552Abstract: An exhaust gas treatment catalyst for removal of one or more pollutants in an exhaust gas, the catalyst comprising: a SO3-reducing catalyst powder which removes the above-described pollutants; and a diluent powder which is not the SO3-reducing catalyst powder nor a catalyst for reactions between exhaust gas components and a reagent, wherein the SO3-reducing catalyst powder is dispersed in the diluent powder.Type: ApplicationFiled: February 4, 2009Publication date: August 5, 2010Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., CORMETECH, INC.Inventors: Yoshiaki OBAYASHI, Katsumi NOCHI, Toshio KOYANAGI, Chris E. DIFRANCESCO
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Patent number: 7666808Abstract: A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.Type: GrantFiled: April 17, 2008Date of Patent: February 23, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoshiaki Obayashi, Toshio Koyanagi, Masanori Demoto
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Patent number: 7501106Abstract: A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.Type: GrantFiled: November 23, 2004Date of Patent: March 10, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoshiaki Obayashi, Toshio Koyanagi, Masanori Demoto
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Patent number: 7501104Abstract: A discharge gas treatment apparatus and method which lower treatment cost and which attain efficient removal of mercury contained in a discharge gas are provided. The discharge gas treatment apparatus, includes a cooling apparatus for controlling the temperature of the discharge gas to a predetermined temperature in accordance with the hydrogen chloride concentration of the discharge gas; an NOx removal catalyst unit for reducing nitrogen oxide contained in the discharge gas and for causing reaction between mercury and hydrogen chloride contained in the discharge gas, the discharge gas having been controlled to the predetermined temperature and having been introduced to the apparatus, with ammonia being added thereto; and a wet-format desulfurization apparatus, disposed on the downstream side with respect to the NOx removal catalyst unit, for removing sulfur oxide and mercury chloride contained in the discharge gas through dissolving sulfur oxide and mercury chloride in a liquid absorbent.Type: GrantFiled: August 30, 2006Date of Patent: March 10, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoshiaki Obayashi, Kozo Iida, Toshio Koyanagi
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Publication number: 20080220966Abstract: A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.Type: ApplicationFiled: April 17, 2008Publication date: September 11, 2008Inventors: Yoshiaki Obayashi, Toshio Koyanagi, Masanori Demoto
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Publication number: 20070217968Abstract: It is intended to provide an exhaust gas treatment system, which allows for VOC removal at lower temperatures and thereby improves the durability of catalysts and suppresses carbon monoxide generation at the final outlet of the system. The present invention provides a treatment system of an exhaust gas containing a nitrogen oxide, carbon monoxide, and a volatile organic compound comprising: an exhaust gas treatment means for removing the nitrogen oxide by reduction with ammonia and partially oxidizing the VOC to CO; and a CO/VOC removal means for oxidizing the CO and partially unreacted VOC, in this order from the upstream flow of the exhaust gas.Type: ApplicationFiled: February 13, 2007Publication date: September 20, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Publication number: 20070207078Abstract: An object of the present invention is to provide a catalyst for treating exhaust gas adapted not only to remove CO and VOCs based on unsaturated hydrocarbons such as C2H4 but also to accelerate a decomposition reaction of saturated hydrocarbons such as propane and to provide a method for producing such a catalyst for treating exhaust gas. The present invention provides a catalyst for treating an exhaust gas containing carbon monoxide and volatile organic compounds, the catalyst comprising a substrate containing a NOx removal catalyst component and a porous inorganic compound layer containing a noble metal, the layer being applied to the substrate.Type: ApplicationFiled: February 12, 2007Publication date: September 6, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsumi Nochi, Masanao Yonemura, Yoshiaki Obayashi, Hitoshi Nakamura, Toshio Koyanagi
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Publication number: 20070140939Abstract: The invention provides a discharge gas treatment apparatus and method which prevent increase in treatment cost and which attain efficient removal of mercury contained in a discharge gas.Type: ApplicationFiled: August 30, 2006Publication date: June 21, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshiaki Obayashi, Kozo Iida, Toshio Koyanagi
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Publication number: 20050192176Abstract: A denitrification catalyst regeneration method comprises heat-treating a used denitrification catalyst, then cleaning the denitrification catalyst with an aqueous solution of oxalic acid, and then finish washing the denitrification catalyst with water to regenerate the denitrification catalyst.Type: ApplicationFiled: November 23, 2004Publication date: September 1, 2005Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshiaki Obayashi, Toshio Koyanagi, Masanori Demoto
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Patent number: 4925640Abstract: A new method for denitration by ammonia of exhaust gas containing arsenic compounds which degrades a denitrating catalyst used is disclosed as well as a method and an apparatus, based on the same principle as the above method, for regenerating an already degraded catalyst. These effects are achieved, without taking the catalyst out of the system, by adjusting the humidity and temperature of the atmosphere surrounding the catalyst filled in the denitration reactor with simple and economical means so that arsenic compounds accumulated on the catalyst surface will diffuse into the catalyst reducing their concentration on the surface, which is important for the catalytic action.Type: GrantFiled: August 15, 1988Date of Patent: May 15, 1990Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Atsushi Morii, Toshio Koyanagi, Hiromu Takatsuka, kouzou Iida
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Patent number: 4869735Abstract: Here is provided an adsorbent for adsorbing and removing an arsenic compound which becomes a catalyst poison in a selective contact reduction process for removing nitrogen oxides (NOx) from a combustion exhaust gas by the use of an ammonia as a reducing agent and a denitrating catalyst.The adsorbent of the present invention comprises a material in which the total volume of pores is 0.2 to 0.7 cc/g and the volume of the pores having a pore diameter of 300 .ANG. or more is 10% or more with respect to the total pore volume, and the material is a specific element, its oxide, an ion-exchanged zeolite or the like.In addition, the present invention is directed to a method for removing the arsenic compound from the combustion exhaust gas by injecting the adsorbent into the flow of the gas on the upstream side of the denitrating catalyst.Type: GrantFiled: April 28, 1988Date of Patent: September 26, 1989Assignees: Mitsubishi Jukogyo K.K., Chemical Ind. Sakai, Mitsubishi Petrochemical Co., Ltd., Petrochemical Engineering Co., Ltd. Mitsubishi, Catalysts & Chemical Co., Ltd.Inventors: Masaki Miyazawa, Norihisa Kobayashi, Hiromu Takatsuka, Atsushi Morii, Toshio Koyanagi, Touru Seto, Kozo Iida, Shigeaki Mitsuoka, Hiroaki Rikimaru, Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano
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Patent number: 4796545Abstract: An apparatus for treating a combustion exhaust gas is here provided which comprises a fire furnace, a denitrating reactor for denitrating the combustion exhaust gas discharged from the fire furnace, a dust collector for collecting solids in the exhaust gas passed through the reactor, and a transport pipe for circulating the solids collected by the dust collector through the fire furnace, the apparatus being characterized in that the transport pipe is provided with an arsenic removal means for removing arsenic from the solids. The arsenic removal means may be a heating device or a washing device. The dust collector may be provided with a means for discarding the solids having a particle diameter of 10 .mu.m or less.Type: GrantFiled: March 11, 1988Date of Patent: January 10, 1989Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Katsuo Hashizaki, Toshio Koyanagi, Atsushi Morii