Patents by Inventor Yasuhide Noaki
Yasuhide Noaki 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: 9963795Abstract: Provided are a gasket and an electrolyzer capable of preventing an electrolyte or a gas from leaking from a diaphragm. An annular gasket includes first and second surfaces which respectively contact a frame near a positive electrode and a frame near a negative electrode and a slit portion which is opened inward and is provided in the entire periphery of the gasket so as to accommodate an edge of an ion-permeable diaphragm.Type: GrantFiled: April 23, 2014Date of Patent: May 8, 2018Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Kenji Nakagawa, Shinji Hasegawa, Yousuke Uchino, Yasuhide Noaki
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Patent number: 9683300Abstract: A bipolar alkaline water electrolysis unit incorporated in an electrolytic cell for electrolyzing an electrolytic solution of alkaline water to obtain oxygen and hydrogen, the bipolar alkaline water electrolysis unit including an oxygen generating anode, a hydrogen generating cathode, a conductive partition wall that separates the anode and the cathode from each other, and an outer frame that surrounds the conductive partition wall, wherein a gas and electrolytic solution passage is provided at an upper portion of the conductive partition wall and/or the outer frame, and an electrolytic solution passage is provided at a lower part of the conductive partition wall and/or the outer frame.Type: GrantFiled: June 17, 2013Date of Patent: June 20, 2017Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Yasuhide Noaki, Yousuke Uchino, Keiji Miyoshi
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Publication number: 20160153100Abstract: Provided are a gasket and an electrolyser capable of preventing an electrolyte or a gas from leaking from a diaphragm. An annular gasket includes first and second surfaces and which respectively contact a frame near a positive electrode and a frame near a negative electrode and a slit portion which is opened inward and is provided in the entire periphery of the gasket so as to accommodate an edge of an ion-permeable diaphragm.Type: ApplicationFiled: April 23, 2014Publication date: June 2, 2016Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Kenji NAKAGAWA, Shinji HASEGAWA, Yousuke UCHINO, Yasuhide NOAKI
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Publication number: 20150203976Abstract: A bipolar alkaline water electrolysis unit incorporated in an electrolytic cell for electrolyzing an electrolytic solution of alkaline water to obtain oxygen and hydrogen, the bipolar alkaline water electrolysis unit including an oxygen generating anode, a hydrogen generating cathode, a conductive partition wall that separates the anode and the cathode from each other, and an outer frame that surrounds the conductive partition wall, wherein a gas and electrolytic solution passage is provided at an upper portion of the conductive partition wall and/or the outer frame, and an electrolytic solution passage is provided at a lower part of the conductive partition wall and/or the outer frame.Type: ApplicationFiled: June 17, 2013Publication date: July 23, 2015Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Yasuhide Noaki, Yousuke Uchino, Keiji Miyoshi
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Patent number: 7323090Abstract: A bipolar zero-gap electrolytic cell comprising an anode comprising an anode substrate constituted of a titanium expanded metal or titanium metal net of 25 to 70% opening ratio, which anode after coating the substrate with a catalyst has a surface of 5 to 50 ?m unevenness difference maximum and has a thickness of 0.7 to 2.0 mm. In this electrolytic cell, the possibility of breakage of ion exchange membrane is low, and the anolyte and catholyte have a concentration distribution falling within given range. With this electrolytic cell, stable electrolysis can be performed for a prolonged period of time with less variation of cell internal pressure.Type: GrantFiled: November 26, 2003Date of Patent: January 29, 2008Assignee: Asahi Kasei Chemicals CorporationInventors: Hiroyoshi Houda, Yasuhide Noaki
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Patent number: 7229536Abstract: An electrode for use in hydrogen generation comprising a conductive base and a coating layer formed thereon of a composition obtainable by thermally decomposing, in the presence of an organic acid, a mixture comprising at least one type of platinum compound.Type: GrantFiled: June 21, 2006Date of Patent: June 12, 2007Assignee: Asahi Kasei Kabushiki KaishaInventors: Hiroyoshi Houda, Yasuhide Noaki, Kentaro Sako
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Publication number: 20060231387Abstract: An electrode for use in hydrogen generation comprising a conductive base and a coating layer formed thereon of a composition obtainable by thermally decomposing, in the presence of an organic acid, a mixture comprising at least one type of platinum compound.Type: ApplicationFiled: June 21, 2006Publication date: October 19, 2006Inventors: Hiroyoshi Houda, Yasuhide Noaki, Kentaro Sako
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Patent number: 7122219Abstract: An electrode for use in hydrogen generation comprising a conductive base and a coating layer formed thereon of a composition obtainable by thermally decomposing, in the presence of an organic acid, a mixture comprising at least one type of platinum compound.Type: GrantFiled: March 20, 2003Date of Patent: October 17, 2006Assignee: Asahi Kasei Kabushiki KaishaInventors: Hiroyoshi Houda, Yasuhide Noaki, Kentaro Sako
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Publication number: 20060042935Abstract: A bipolar zero-gap electrolytic cell comprising an anode comprising an anode substrate constituted of a titanium expanded metal or titanium metal net of 25 to 70% opening ratio, which anode after coating the substrate with a catalyst has a surface of 5 to 50 ?m unevenness difference maximum and has a thickness of 0.7 to 2.0 mm. In this electrolytic cell, the possibility of breakage of ion exchange membrane is low, and the anolyte and catholyte have a concentration distribution falling within given range. With this electrolytic cell, stable electrolysis can be performed for a prolonged period of time with less variation of cell internal pressure.Type: ApplicationFiled: November 26, 2003Publication date: March 2, 2006Inventors: Hiroyoshi Houda, Yasuhide Noaki
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Patent number: 6773561Abstract: Disclosed is a unit cell for use in a bipolar, filter press type electrolytic cell comprising a plurality of unit cells arranged in series through a cation exchange membrane disposed between respective adjacent unit cells, each unit cell comprising anode-side and cathode-side pan-shaped bodies having anode-side and cathode-side gas-liquid separation chambers respectively extending over the entire lengths of the upper sides of anode and cathode compartments, wherein the anode-side and cathode-side gas-liquid separation chambers have perforated bottom walls separating the anode-side and cathode-side gas-liquid separation chambers from the anode and cathode compartments, respectively, wherein a bubble removing partition wall is disposed at least in the anode-side gas-liquid separation chamber of both gas-liquid separation chambers and extends upwardly of the perforated bottom wall of the gas-liquid separation chamber and along the entire length of the gas-liquid separation chamber to partition the gas-liquid sepType: GrantFiled: January 7, 2002Date of Patent: August 10, 2004Assignee: Asahi Kasei Kabushiki KaishaInventors: Yasuhide Noaki, Saburo Okamoto
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Publication number: 20040151896Abstract: An electrode for use in hydrogen generation comprising a conductive base and a coating layer formed thereon of a composition obtainable by thermally decomposing, in the presence of an organic acid, a mixture comprising at least one type of platinum compound.Type: ApplicationFiled: November 20, 2003Publication date: August 5, 2004Inventors: Hiroyoshi Houda, Yasuhide Noaki, Kentaro Sako
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Patent number: 5449697Abstract: The present invention provides an ion exchange membrane used for a proton exchange membrane type fuel cell comprising a repeating unit represented by the following formula ##STR1## wherein x is 0, 1 or 2, y is 2 or 3, L and m are positive numbers and L/m is a positive number of 10 or less; and having an electrical conductivity of 0.11 to 0.30 .OMEGA..sup.-1 cm.sup.-1 at 25.degree. C., a permeability coefficient to hydrogen gas of 9.0.times.10.sup.-9 to 24.0.times.10.sup.-9 cc cm/(cm.sup.2 sec cmHg) at 40.degree. C., a permeability coefficient to oxygen gas of 5.0.times.10.sup.-9 to 11.0.times.10.sup.-9 cc cm/(cm.sup.2 sec cmHg) at 40.degree. C. and a water content of more than 100 to 250% by weight.According to the present invention, the ion exchange membrane used for a proton exchange membrane type fuel cell having excellent performance as a diaphragm and an electrolyte can be provided.Type: GrantFiled: June 3, 1994Date of Patent: September 12, 1995Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yasuhide Noaki, Saburo Okamoto
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Patent number: 5225060Abstract: Disclosed is a bipolar, filter press type electrolytic cell comprising a plurality of unit cells which are arranged in series through a cation exchange membrane disposed between respective adjacent unit cells, each unit cell containing anode-side and cathode-side gas-liquid separation chambers respectively disposed in anode-side and cathode-side non-current-flowing spaces and extending over the entire upper-side lengths of anode and cathode compartments. This electrolytic cell can be utilized to stably perform, for a prolonged period of time, the electrolysis of an aqueous alkali metal chloride solution at low cost without causing not only a leakage of an electrolytic solution but also vibration of the cell and formation of a gas zone in the upper portion of the anode and cathode compartments even in the electrolysis conducted at a high current density and at a high alkali concentration.Type: GrantFiled: March 18, 1992Date of Patent: July 6, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yasuhide Noaki, Saburo Okamoto
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Patent number: 5084154Abstract: A highly durable, stable electrode having a coating comprised of an oxide of at least one metal selected from nickel and cobalt, which coating additionally contains titanium and zirconium components in proportions of 0.1. to 3.5% in terms of atomic percentage of titanium and 0.1 to 3% in terms of atomic percentage of zirconium, respectively. The electrode can advantageously be used in electrolyses in which hydrogen is evolved on the electrode, such as electrolyses of an alkali metal chloride and water. The electrode advantageously exhibits a low hydrogen overvoltage, enabling electrolysis to be performed stably for a prolonged period of time.Type: GrantFiled: August 6, 1990Date of Patent: January 28, 1992Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Masanobu Wakizoe, Yasuhide Noaki
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Patent number: 4839015Abstract: A hydrogen-evolution electrode comprising an electrically conductive substrate having thereon a coating comprising a chromium component, a titanium component and an oxide of at least one metal selected from the group consisting of nickel and cobalt, said chromium component and titanium component being present in proportions, in terms of atomic percentage, of 0.5 to 40% and 0.1 to 10%, respectively. The titanium component retards the dissolution rate of the chromium component. Accordingly, the electrode has a life several times as long as that of the conventional electrodes, and can exhibit an advantageously low hydrogen overvoltage for a prolonged period of time. Also, the electrode can be advantageously employed to produce an alkali product improved in purity.Type: GrantFiled: March 3, 1988Date of Patent: June 13, 1989Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hisashi Wakamatsu, Yasuhide Noaki
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Patent number: 4605484Abstract: An improved hydrogen-evolution electrode having thereon a coating containing an oxide of at least one metal selected from nickel and cobalt and further containing a chromium component in a proportion, in terms of atomic percentage, of 0.5 to 20% has been found to exhibit extremely low hydrogen overvoltage and to have not only high catalytic activity but also high durability. Such a hydrogen-evolution electrode can be produced by melt-spraying onto a substrate a mixture of a powder of at least one member selected from the first group consisting of nickel, cobalt, oxides of nickel and cobalt, hydroxides of nickel and cobalt, organic acid salts of nickel and cobalt and inorganic acid salts of nickel and cobalt and a powder of at least one member selected from the second group consisting of chromium, an oxide of chromium, a hydroxide of chromium, an organic acid salt of chromium and an inorganic acid salt of chromium.Type: GrantFiled: May 6, 1985Date of Patent: August 12, 1986Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hiroyuki Shiroki, Yasuhide Noaki