Patents by Inventor Naomi Imada
Naomi Imada 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: 10898881Abstract: A catalyst for oxidation reaction of metallic mercury and reduction reaction of nitrogen oxide, comprising an oxide of titanium, an oxide of molybdenum, an oxide of vanadium, an oxide of phosphorus and gypsum is obtained by kneading titanium dioxide, ammonium molybdate, ammonium metavanadate, phosphoric acid, gypsum dihydrate and water using a kneader to obtain a paste, applying the paste to a metal lath substrate, and then drying and calcining the resultant.Type: GrantFiled: March 1, 2017Date of Patent: January 26, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Shinpei Kaneda, Naomi Imada, Yasuyoshi Kato
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Patent number: 10549264Abstract: A used denitration catalyst is regenerated by means of a method comprising bringing the used denitration catalyst comprising titanium oxide as an essential ingredient into contact with a suspension of particles comprising manganese oxide, subjecting the resulting product to a liquid draining, and subjecting the liquid-drained product to a drying process, additionally, further comprising impregnating a solution comprising a compound containing at least one element selected from the group consisting of vanadium, molybdenum and tungsten into the denitration catalyst after the drying process, and subjecting the impregnated product to a drying treatment.Type: GrantFiled: April 13, 2016Date of Patent: February 4, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keiichiro Kai, Yasuyoshi Kato, Naomi Imada
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Publication number: 20190015821Abstract: A catalyst for oxidation reaction of metallic mercury and reduction reaction of nitrogen oxide, comprising an oxide of titanium, an oxide of molybdenum, an oxide of vanadium, an oxide of phosphorus and gypsum is obtained by kneading titanium dioxide, ammonium molybdate, ammonium metavanadate, phosphoric acid, gypsum dihydrate and water using a kneader to obtain a paste, applying the paste to a metal lath substrate, and then drying and calcining the resultant.Type: ApplicationFiled: March 1, 2017Publication date: January 17, 2019Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Shinpei Kaneda, Naomi Imada, Yasuyoshi Kato
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Publication number: 20180133691Abstract: A used denitration catalyst is regenerated by means of a method comprising bringing the used denitration catalyst comprising titanium oxide as an essential ingredient into contact with a suspension of particles comprising manganese oxide, subjecting the resulting product to a liquid draining, and subjecting the liquid-drained product to a drying process, additionally, further comprising impregnating a solution comprising a compound containing at least one element selected from the group consisting of vanadium, molybdenum and tungsten into the denitration catalyst after the drying process, and subjecting the impregnated product to a drying treatment.Type: ApplicationFiled: April 13, 2016Publication date: May 17, 2018Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keiichiro KAI, Yasuyoshi KATO, Naomi IMADA
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Patent number: 9724683Abstract: Provided is a catalyst structure which prevents an increase in pressure loss by a simple construction while the gas flow is efficiently stirred by a structure making contact between adjacent catalyst elements. The catalyst structure is provided with a first flat-plate part and a second flat-plate part which support, on surfaces thereof, a constituent having catalytic activity to an exhaust gas and face each other, and a stirring part which is provided in such a manner as to come into contact first with the first flat-plate part and the second flat-plate part in an extending manner from the first flat-plate part to the second flat-plate part at a prescribed angle with respect to the direction in which the exhaust gas flows.Type: GrantFiled: July 11, 2013Date of Patent: August 8, 2017Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Yasuyoshi Kato, Keiichiro Kai, Kenichi Arakawa, Naomi Imada
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Patent number: 9186657Abstract: An exhaust gas purification catalyst contains titanium oxide as a main component and an oxide of one element or two or more elements selected from the group consisting of tungsten (W), molybdenum (Mo), and vanadium (V) as an active component, wherein the exhaust gas purification catalyst contains phosphoric acid or a water soluble phosphoric acid compound so that the atomic ratio of phosphorus (P) to a catalytically active component represented by the following formula is more than 0 and 1.0 or less; P/catalytically active component (atomic ratio)=number of moles of P/(number of moles of W+number of moles of Mo+number of moles of V).Type: GrantFiled: May 7, 2013Date of Patent: November 17, 2015Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Yasuyoshi Kato, Naomi Imada, Keiichiro Kai
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Publication number: 20150182958Abstract: Provided is a catalyst structure which prevents an increase in pressure loss by a simple construction while the gas flow is efficiently stirred by a structure making contact between adjacent catalyst elements. The catalyst structure is provided with a first flat-plate part and a second flat-plate part which support, on surfaces thereof, a constituent having catalytic activity to an exhaust gas and face each other, and a stirring part which is provided in such a manner as to come into contact first with the first flat-plate part and the second flat-plate part in an extending manner from the first flat-plate part to the second flat-plate part at a prescribed angle with respect to the direction in which the exhaust gas flows.Type: ApplicationFiled: July 11, 2013Publication date: July 2, 2015Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Yasuyoshi Kato, Keiichiro Kai, Kenichi Arakawa, Naomi Imada
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Patent number: 9044736Abstract: A metal substrate for flue gas-denitration catalyst that, like SUS304, can be used without corroding is provided by improving the corrosion resistance of SUS430 substrate that is inexpensive and can easily be supplied stably. A method for producing the metal substrate for flue gas-denitration catalyst, wherein the method comprising the steps of: lath-processing a band-shaped steel plate made of ferrite stainless steel into a band-shaped metal lath; (1) degreasing process oil adhering to the metal lath; (2) passing the metal lath through a solution containing phosphoric acid and surfactant to load the solution; (3) draining off the excess solution; and (4) drying and heating the solution-loaded metal lath to react the phosphoric acid with the substrate, in which respective steps are carried out sequentially to form a film of phosphate compound on a surface of the substrate.Type: GrantFiled: June 28, 2011Date of Patent: June 2, 2015Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Yasuyoshi Kato, Naomi Imada, Keiichiro Kai, Kotoe Matsuyama
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Publication number: 20140228208Abstract: A metal substrate for flue gas-denitration catalyst that, like SUS304, can be used without corroding is provided by improving the corrosion resistance of SUS430 substrate that is inexpensive and can easily be supplied stably. A method for producing the metal substrate for flue gas-denitration catalyst, wherein the method comprising the steps of: lath-processing a band-shaped steel plate made of ferrite stainless steel into a band-shaped metal lath; (1) degreasing process oil adhering to the metal lath; (2) passing the metal lath through a solution containing phosphoric acid and surfactant to load the solution; (3) draining off the excess solution; and (4) drying and heating the solution-loaded metal lath to react the phosphoric acid with the substrate, in which respective steps are carried out sequentially to form a film of phosphate compound on a surface of the substrate.Type: ApplicationFiled: June 28, 2011Publication date: August 14, 2014Applicant: Babcock-Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Naomi Imada, Keiichiro Kai, Kotoe Matsuyama
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Patent number: 8673250Abstract: An exhaust gas purification catalyst is made as a composition comprising titanium oxide (TiO2), aluminum sulfate (Al2(SO4)3), an oxide of vanadium (V), and an oxide of molybdenum (Mo) and/or tungsten (W), wherein on titanium oxide having sulfate ions and aluminum ions adsorbed thereon obtained by making contact with aluminum sulfate at more than 1 wt % and not more than 6 wt % relative to titanium oxide in the presence of water, an oxo acid salt of vanadium or a vanadyl salt and an oxo acid or an oxo acid salt of molybdenum and/or tungsten are supported in a proportion of more than 0 atom % and not more than 3 atom %, respectively. By this, the degradation of catalyst performance can be suppressed even with exhaust gas containing potassium compounds at a high concentration in combustion ash.Type: GrantFiled: August 4, 2011Date of Patent: March 18, 2014Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Keiichiro Kai, Yasuyoshi Kato, Naomi Imada
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Publication number: 20130251612Abstract: An exhaust gas purification catalyst contains titanium oxide as a main component and an oxide of one element or two or more elements selected from the group consisting of tungsten (W), molybdenum (Mo), and vanadium (V) as an active component, wherein the exhaust gas purification catalyst contains phosphoric acid or a water soluble phosphoric acid compound so that the atomic ratio of phosphorus (P) to a catalytically active component represented by the following formula is more than 0 and 1.0 or less; P/catalytically active component (atomic ratio)=number of moles of P/(number of moles of W+number of moles of Mo+number of moles of V).Type: ApplicationFiled: May 7, 2013Publication date: September 26, 2013Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: YASUYOSHI KATO, NAOMI IMADA, KEIICHIRO KAI
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Patent number: 8535628Abstract: To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO2 oxidation activity; i.e., an exhaust gas purifying catalyst which specifically reduces percent SO2 oxidation, while maintaining percent Hg oxidation at a high level. The invention provides an exhaust gas purifying catalyst which comprises a composition containing oxides of (i) titanium (Ti), (ii) molybdenum (Mo) and/or tungsten (W), (iii) vanadium (V), and (iv) phosphorus (P), wherein the catalyst contains Ti, Mo and/or W, and V in atomic proportions of 85 to 97.5:2 to 10: 0.5 to 10, and has an atomic ratio of P/(sum of V and Mo and/or W) of 0.5 to 1.Type: GrantFiled: December 31, 2012Date of Patent: September 17, 2013Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Keiichiro Kai, Naomi Imada
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Patent number: 8518852Abstract: The present invention provides a catalyst base material and a catalyst which have high strength, high porosity or high activity and methods of producing the catalyst base material and catalyst. The present invention relates to a method of producing a catalyst base material, the method comprising dispersing or dissolving a hydrophilic polymer coagulant as a first component, a water-soluble thickener as a second component, a colloidal inorganic binder as a third component and an inorganic fiber as a fourth component in water to form a catalytic slurry or paste, supporting the catalytic slurry or paste on a net-like substrate such that the meshes of the net-like substrate are filled up with the slurry or paste, by drying and/or calcinating the substrate.Type: GrantFiled: August 28, 2006Date of Patent: August 27, 2013Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Naomi Imada
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Patent number: 8470728Abstract: To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO2 oxidation activity; i.e., an exhaust gas purifying catalyst which specifically reduces percent SO2 oxidation, while maintaining percent Hg oxidation at a high level. The invention provides an exhaust gas purifying catalyst which comprises a composition containing oxides of (i) titanium (Ti), (ii) molybdenum (Mo) and/or tungsten (W), (iii) vanadium (V), and (iv) phosphorus (P), wherein the catalyst contains Ti, Mo and/or W, and V in atomic proportions of 85 to 97.5:2 to 10:0.5 to 10, and has an atomic ratio of P/(sum of V and Mo and/or W) of 0.5 to 1.Type: GrantFiled: September 7, 2007Date of Patent: June 25, 2013Assignee: Babcock Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Keiichiro Kai, Naomi Imada
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Publication number: 20130142719Abstract: An exhaust gas purification catalyst is made as a composition comprising titanium oxide (TiO2), aluminum sulfate (Al2(SO4)3), an oxide of vanadium (V), and an oxide of molybdenum (Mo) and/or tungsten (W), wherein on titanium oxide having sulfate ions and aluminum ions adsorbed thereon obtained by making contact with aluminum sulfate at more than 1 wt % and not more than 6 wt % relative to titanium oxide in the presence of water, an oxo acid salt of vanadium or a vanadyl salt and an oxo acid or an oxo acid salt of molybdenum and/or tungsten are supported in a proportion of more than 0 atom % and not more than 3 atom %, respectively. By this, the degradation of catalyst performance can be suppressed even with exhaust gas containing potassium compounds at a high concentration in combustion ash.Type: ApplicationFiled: August 4, 2011Publication date: June 6, 2013Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Keiichiro Kai, Yasuyoshi Kato, Naomi Imada
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Publication number: 20130129590Abstract: To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO2 oxidation activity; i.e., an exhaust gas purifying catalyst which specifically reduces percent SO2 oxidation, while maintaining percent Hg oxidation at a high level. The invention provides an exhaust gas purifying catalyst which comprises a composition containing oxides of (i) titanium (Ti), (ii) molybdenum (Mo) and/or tungsten (W), (iii) vanadium (V), and (iv) phosphorus (P), wherein the catalyst contains Ti, Mo and/or W, and V in atomic proportions of 85 to 97.5:2 to 10: 0.5 to 10, and has an atomic ratio of P/(sum of V and Mo and/or W) of 0.5 to 1.Type: ApplicationFiled: December 31, 2012Publication date: May 23, 2013Applicant: Babcock-Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Keiichiro Kai, Naomi Imada
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Publication number: 20110189069Abstract: The invention realizes a catalyst which is hardly deteriorated even when volatile catalyst-poisoning compounds such as P and As are accumulated and which can reduce the rate of oxidation of SO2 to a level as low as a fraction of that of the catalyst in the prior art, and provides an exhaust gas purification catalyst which can maintain a high activity and a low rate of oxidation of SO2 for a long time even with any diversified coal, a method of producing the same, and an exhaust gas purification method using the same. Disclosed is an exhaust gas purification catalyst having a composition comprising oxides of titanium (Ti), molybdenum (Mo) and/or tungsten (W), vanadium (V) and bismuth (Bi), wherein the atomic ratio of Ti:(Mo and/or W):V is 75 to 98.9:1 to 0.1 to 10 and the atomic ratio of Bi/(Mo and/or W) is 0.1 to 0.8.Type: ApplicationFiled: April 14, 2011Publication date: August 4, 2011Inventors: Yasuyoshi KATO, Keiichiro KAI, Naomi IMADA
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Publication number: 20110116999Abstract: An exhaust gas purification catalyst is provided which contains titanium oxide as a main component and an oxide of one element or two or more elements selected from the group consisting of tungsten (W), molybdenum (Mo), and vanadium (V) as an active component, wherein the exhaust gas purification catalyst contains phosphoric acid or a water soluble phosphoric acid compound so that the atomic ratio of phosphorus (P) to a catalytically active component represented by the following formula is more than 0 and 1.0 or less; P/catalytically active component (atomic ratio)=number of moles of P/(number of moles of W+number of moles of Mo+number of moles of V).Type: ApplicationFiled: March 25, 2009Publication date: May 19, 2011Inventors: Yasuyoshi Kato, Naomi Imada, Keiichiro Kai
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Patent number: 7824635Abstract: A particulate material removing filter for exhaust gas from a diesel engine is provided. The particulate material removing filter is formed by laminating metal laths having an oxidation catalyst layer containing a noble metal that oxidizes nitrogen oxide in exhaust gas into nitrogen dioxide. The metal laths are laminated to form a laminate in such a manner that the drawing direction of the metal lath processing differs by 90 degrees with each other.Type: GrantFiled: November 24, 2004Date of Patent: November 2, 2010Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yasuyoshi Kato, Eiji Miyamoto, Masatoshi Fujisawa, Naomi Imada, Hiroshi Ishizaka, Kazuki Kobayashi, Takeshi Hirota
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Publication number: 20100183492Abstract: To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO2 oxidation activity; i.e., an exhaust gas purifying catalyst which specifically reduces percent SO2 oxidation, while maintaining percent Hg oxidation at a high level. The invention provides an exhaust gas purifying catalyst which comprises a composition containing oxides of (i) titanium (Ti), (ii) molybdenum (Mo) and/or tungsten (W), (iii) vanadium (V), and (iv) phosphorus (P), wherein the catalyst contains Ti, Mo and/or W, and V in atomic proportions of 85 to 97.5:2 to 10:0.5 to 10, and has an atomic ratio of P/(sum of V and Mo and/or W) of 0.5 to 1.Type: ApplicationFiled: September 7, 2007Publication date: July 22, 2010Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Yasuyoshi Kato, Keiichiro Kai, Naomi Imada