Patents Assigned to Daiki Ataka Engineering Co., Ltd.
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Patent number: 7914653Abstract: Disclosed is an anode for electrochemical reactions, such as electrolysis and electrodeposition, comprising a titanium substrate covered with metal oxide, in which the amount of platinum group element(s) is decreased in comparison with the ordinary anode of platinum group element oxides so as to decrease the cost and to mitigate the problem of natural resources, and further, durability of the anode is improved. The electrocatalyst of the anode is multiple oxide of platinum group element(s), and Sn and Sb. The cationic ratio of Sn to Sb is 1-40 and the sum of Sn and Sb is 1-90 cationic %. The electrocatalyst is prepared by coating mixed solutions of the soluble salts on the substrate and baking, so as to convert the metal salts to metal oxides.Type: GrantFiled: October 25, 2007Date of Patent: March 29, 2011Assignees: Koji Hashimoto, Daiki Ataka Engineering Co., Ltd.Inventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai
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Patent number: 7811426Abstract: Disclosed is an oxygen evolution anode for evolving oxygen without chlorine evolution in electrolysis of aqueous solutions of sodium chloride having high performance and durability with decreased amount of the precious metal(s) in the intermediate layer to decrease manufacturing cost and to ease problem of the resources. The oxygen evolution anode comprises an electroconductive substrate, an intermediate layer and an electrocatalyst. The intermediate layer prepared by calcination consists of multiple oxide of the platinum group element(s), Sn and Sb, with the Sn/Sb ratio of 1-40 and with the sum of Sn and Sb of 90 cationic % or less. The electrocatalyst is prepared by anodic deposition and consists of 0.1-3 cationic % of Sn, 0.2-20 cationic % of Mo and/or W and the balance of Mn.Type: GrantFiled: October 25, 2007Date of Patent: October 12, 2010Assignees: Daiki Ataka Engineering Co., Ltd.Inventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai
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Patent number: 7803260Abstract: Disclosed is an oxygen evolution electrode for formation of only oxygen without formation of chlorine at anode in the performance and the durability of the anode is so high that they are, even in strong acid, at the same level as that in neutral solution. The electrode is prepared by anodic deposition of multiple oxide consisting of Mn—Mo—Sn, Mo—W—Sn or Mn—Mo—W—Sn on an IrO2-coated titanium substrate. The multiple oxide are composed of Mn as the main component, 0.1-3 cationic % of Sn and 0.2-20 cationic % of Mo and/or W.Type: GrantFiled: October 25, 2007Date of Patent: September 28, 2010Assignees: Daiki Ataka Engineering Co., Ltd., Koji HashimotoInventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai
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Publication number: 20090042998Abstract: Disclosed is a catalyst for methanation reaction producing methane with high conversion by reaction of hydrogen with carbon dioxide, or a gas mixture of carbon dioxide and carbon monoxide, or a gas mixture containing these compounds as the main components. The catalyst is prepared by the steps of mixing (A) aqueous zirconia sol with salts of (B) stabilizing element(s), which is selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg, and (C) iron group element(s), drying and calcining the mixture to obtain a catalyst precursor, and subsequent reduction of the precursor. The catalyst comprises, by atomic %, A: 18-70%, B: 1-20% and C: 25-80% based on the elemental states of the metals. The catalyst is characterized by multiple oxide of tetragonal zirconia structure, in which not only the stabilizing element(s) but also a part of the iron group element(s) is incorporated, and on which the iron group element(s) in the metallic state is supported.Type: ApplicationFiled: August 1, 2008Publication date: February 12, 2009Applicants: DAIKI ATAKA ENGINEERING CO., LTD., Koji HASHIMOTOInventors: Koji HASHIMOTO, Hiroyuki Takano, Kouichi Izumiya, Naokazu Kumagai, Zenta Kato, Hiroyuki Shinomiya
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Publication number: 20080149476Abstract: Disclosed is an anode for electrochemical reactions, such as electrolysis and electrodeposition, comprising a titanium substrate covered with metal oxide, in which the amount of platinum group element(s) is decreased in comparison with the ordinary anode of platinum group element oxides so as to decrease the cost and to mitigate the problem of natural resources, and further, durability of the anode is improved. The electrocatalyst of the anode is multiple oxide of platinum group element(s), and Sn and Sb. The cationic ratio of Sn to Sb is 1-40 and the sum of Sn and Sb is 1-90 cationic %. The electrocatalyst is prepared by coating mixed solutions of the soluble salts on the substrate and baking, so as to convert the metal salts to metal oxides.Type: ApplicationFiled: October 25, 2007Publication date: June 26, 2008Applicants: Daiki Ataka Engineering Co., Ltd., Koji HashimotoInventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai
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Publication number: 20080116065Abstract: Disclosed is an oxygen evolution electrode for formation of only oxygen without formation of chlorine at anode in the performance and the durability of the anode is so high that they are, even in strong acid, at the same level as that in neutral solution. The electrode is prepared by anodic deposition of multiple oxide consisting of Mn—Mo—Sn, Mo—W—Sn or Mn—Mo—W—Sn on an IrO2-coated titanium substrate. The multiple oxide are composed of Mn as the main component, 0.1-3 cationic % of Sn and 0.2-20 cationic % of Mo and/or W.Type: ApplicationFiled: October 25, 2007Publication date: May 22, 2008Applicants: Daiki Ataka Engineering Co., Ltd., Koji HashimotoInventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai
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Publication number: 20080116064Abstract: Disclosed is an oxygen evolution anode for evolving oxygen without chlorine evolution in electrolysis of aqueous solutions of sodium chloride having high performance and durability with decreased amount of the precious metal(s) in the intermediate layer to decrease manufacturing cost and to ease problem of the resources. The oxygen evolution anode comprises an electroconductive substrate, an intermediate layer and an electrocatalyst. The intermediate layer prepared by calcination consists of multiple oxide of the platinum group element(s), Sn and Sb, with the Sn/Sb ratio of 1-40 and with the sum of Sn and Sb of 90 cationic % or less. The electrocatalyst is prepared by anodic deposition and consists of 0.1-3 cationic % of Sn, 0.2-20 cationic % of Mo and/or W and the balance of Mn.Type: ApplicationFiled: October 25, 2007Publication date: May 22, 2008Applicants: Daiki Ataka Engineering Co., Ltd., Koji HashimotoInventors: Koji Hashimoto, Ahmed Abd El-Moneim, Naokazu Kumagai