Patents Assigned to DE NORA PERMELEC LTD.
  • Patent number: 11982007
    Abstract: There are provided an electrolyzer gasket, which can accommodate and hold a separator inside an electrolyzer by a simple handling, can more surely prevent leakage of an electrolyte and an electrolytically generated gas from the inside of the electrolyzer, can keep the separator in such a state that the separator is held at a position that is in contact with one of electrodes and is located along the electrode and therefore can suppress damage of the separator and makes it possible to use the separator stably for a long period of time, and an electrolyzer.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: May 14, 2024
    Assignee: DE NORA PERMELEC LTD
    Inventor: Akiyoshi Manabe
  • Patent number: 11965256
    Abstract: The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a nickel-containing metal oxide having a spinel structure, wherein the nickel-containing metal oxide contains nickel (Ni) and manganese (Mn), and has an atom ratio of Li/Ni/Mn/O of (0.0 to 0.8)/(0.4 to 0.6)/(1.0 to 1.8)/4.0.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: April 23, 2024
    Assignees: KYOTO UNIVERSITY, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD
    Inventors: Yoshiharu Uchimoto, Tomoki Uchiyama, Shigenori Mitsushima, Yoshiyuki Kuroda, Kensaku Nagasawa, Yoshinori Nishiki, Awaludin Zaenal, Yun Bao
  • Publication number: 20240102192
    Abstract: An organic hydride production device comprises an electrolyzer and a water removal device. The electrolyzer has a cathode chamber. The water removal device has a container that stores a catholyte fed from the cathode chamber, a drain pipe that discharges dragged water from the container, a detector that detects that the dragged water has been accumulated in the container, and a switcher that is provided in the drain pipe, is capable of switching between a regulation state in which drainage from the drain pipe is regulated and an execution state in which the drainage is executed, and switches from the regulation state to the execution state based on a detection result of the detector.
    Type: Application
    Filed: November 22, 2021
    Publication date: March 28, 2024
    Applicants: ENEOS Corporation, DE NORA PERMELEC LTD
    Inventors: Kota MIYOSHI, Hideo OTSU, Hiroki DOMON, Jun SUNAMI
  • Patent number: 11866834
    Abstract: The present invention provides an electrode for electrolysis in which electrolysis performance is hard to deteriorate and excellent catalytic activity is kept stable over a long period of time even when electric power in which there is a large fluctuation in output, such as renewable energy, is used as a power source. The electrode for electrolysis is an electrode 10 for electrolysis provided with an electrically conductive substrate 2 at least the surface of which contains nickel or a nickel-based alloy, an intermediate layer 4 formed on the surface of the electrically conductive substrate 2 and containing a lithium-containing nickel oxide represented by composition formula LixNi2-xO2 (0.02?x?0.5), and a catalyst layer 6 of a nickel cobalt spinel oxide, an iridium oxide, or the like, the catalyst layer 6 formed on the surface of the intermediate layer 4.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: January 9, 2024
    Assignees: DE NORA PERMELEC LTD, KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Shigenori Mitsushima, Yoshiyuki Kuroda, Ikuo Nagashima, Tatsuya Taniguchi, Yoshinori Nishiki, Akihiro Kato, Awaludin Zaenal, Fumiya Tsujii, Takaaki Nakai
  • Patent number: 11794147
    Abstract: A wastewater treatment method includes: a soft water treatment 1 of crystallizing calcium carbonate from wastewater to remove the calcium carbonate therefrom; and an electrolysis 2 of electrolyzing some of the wastewater from which the calcium carbonate has been removed to obtain an acidic aqueous solution and an alkaline aqueous solution, wherein at least some of the alkaline aqueous solution is circulated to be used in the soft water treatment 1.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: October 24, 2023
    Assignees: Yokogawa Electric Corporation, De Nora Permelec Ltd
    Inventors: Yasuhiro Matsui, Hideki Komatsu, Yasuhito Ishii, Manabu Ozawa, Yoshinori Nishiki, Masaaki Kato, Rie Morita
  • Patent number: 11718922
    Abstract: [Problem] To provide a stacked structure including electrodes that can effectively prevent misalignment between units. [Solution] A stacked structure 2 including electrodes 232, 332, 412, 233, 333, 422, wherein multiple units 23, 33, 24, 41, 42 including flat units are stacked and fastened by fasteners 25, the respective units 23, 33, 24, 41, 42 comprising frame-shaped fastening portions 237a, 237b, 337a, 337b, 247a, 247b, 417a, 417b, 427a, 427b on outer peripheral portions on both surfaces thereof, being stacked by the surfaces of the respective fastening portions 237a, 237b, 337a, 337b, 247a, 247b, 417a, 417b, 427a, 427b being pressed against each other, and being formed so that the width of fastening portions 247a, 247b, 337a, 337b, 427a, 427b on one unit is different from the width of fastening portions 237a, 237b, 417a, 417b on another unit.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: August 8, 2023
    Assignee: DE NORA PERMELEC LTD
    Inventors: Hideo Otsu, Kota Kuroki
  • Patent number: 11692276
    Abstract: The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: July 4, 2023
    Assignees: DE NORA PERMELEC LTD, KAWASAKI JUKOGYO KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
    Inventors: Shigenori Mitsushima, Yoshiyuki Kuroda, Shohei Takatsu, Ikuo Nagashima, Tatsuya Taniguchi, Akihiko Inomata, Ayaka Nagai, Yoshinori Nishiki, Akihiro Kato, Awaludin Zaenal, Takaaki Nakai
  • Patent number: 11519082
    Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: December 6, 2022
    Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.
    Inventors: Shigenori Mitsushima, Kensaku Nagasawa, Yoshinori Nishiki, Akihiro Kato, Setsuro Ogata, Awaludin Zaenal, Akiyoshi Manabe, Koji Matsuoka, Yasushi Sato
  • Patent number: 11479868
    Abstract: Provided is an electrolytic apparatus capable of pressurizing hydrogen gas produced by the electrolytic apparatus and removing impurities in the produced hydrogen gas. In the electrolytic apparatus, gas compression means 101 including an ejector 110, a storage tank 103 storing a circulation liquid, a circulation pipe 105 circulating a fluid mixture of hydrogen gas and the circulation liquid to the ejector, and a circulation pump 104 is provided in a discharge line 12 for hydrogen gas produced by electrolysis, a hydrogen gas discharge pipe 106 and a first valve V1 are provided in the storage tank 103, impurities in the hydrogen gas are transferred to the circulation liquid to remove the impurities from the hydrogen gas, and a pressure of the hydrogen gas stored in the storage tank 103 is raised by controlling a flow rate of the circulation liquid circulated from the storage tank 103 to the ejector 110 and opening and closing of the first valve V1.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: October 25, 2022
    Assignee: DE NORA PERMELEC LTD
    Inventors: Akiyoshi Manabe, Masahiro Ohara
  • Publication number: 20220333257
    Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode, provided on one side of the electrolyte membrane, that contains a cathode catalyst used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride; an anode, provided opposite to the one side of the electrolyte membrane, that contains an anode catalyst used to oxidize water to produce protons; and an anode support, provided opposite to the electrolyte membrane side of the anode, that supports the anode. The anode support is formed of an elastic porous body of which the Young's modulus is greater than 0.1 N/mm2 and less than 43 N/mm2.
    Type: Application
    Filed: July 6, 2022
    Publication date: October 20, 2022
    Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTD
    Inventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Setsuro OGATA, Akihiro KATO, Awaludin ZAENAL, Koji MATSUOKA, Yasushi SATO
  • Publication number: 20220242757
    Abstract: An apparatus (100) for producing an acidic aqueous solution includes: an electrodialyzer (110) that has a monovalent ion perm-selective ion-exchange membrane and separates wastewater containing chloride ions and alkali metal ions into electrodialysis concentrated water and electrodialysis diluted water by an electrodialysis treatment; an electrolyzer (120) includes an anode that that electrolyzes the electrodialysis concentrated water to produce an acidic aqueous solution; and a first circulator (13) that circulates at least some of the acidic aqueous solution to the wastewater supplied to the electrodialyzer (110), and that adjusts a pH of the wastewater supplied to the electrodialyzer to 3 to 9.
    Type: Application
    Filed: September 4, 2020
    Publication date: August 4, 2022
    Applicant: DE NORA PERMELEC LTD
    Inventors: Manabu OZAWA, Yoshinori NISHIKI, Masaaki KATO, Rie MORITA
  • Patent number: 11390958
    Abstract: An object of the present invention is to provide an electrolysis technique such that the electrolysis performance is unlikely to be deteriorated, and excellent catalytic activity is retained stably over a long period of time even when electric power having a large output fluctuation, such as renewable energy, is used a power source, and this object is realized by an alkaline water electrolysis method, in which an electrolytic solution obtained by dispersing a catalyst containing a hybrid cobalt hydroxide nanosheet (Co-NS) being a composite of a metal hydroxide and an organic substance is supplied to an anode chamber and a cathode chamber that form an electrolytic cell, and the electrolytic solution is used for electrolysis in each chamber in common, and an alkaline water electrolysis anode.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: July 19, 2022
    Assignees: DE NORA PERMELEC LTD, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
    Inventors: Shigenori Mitsushima, Yoshiyuki Kuroda, Takeshi Nishimoto
  • Patent number: 11365484
    Abstract: The chamber frame element of the present invention, which has a smaller amount of voltage drop, consumes less reactive power than the prior art, and exhibits no metal corrosion, is a chamber frame element (14) for an electrolyzer or an electrodialysis cell. The chamber frame element (14) includes: a bag body (141); a frame (142) housed in an interior space of the bag body (141); and an inlet (143) and an outlet (144) to which piping can be attached, which are formed on the outer side of a region where the frame is housed in the bag body (141).
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: June 21, 2022
    Assignee: DE NORA PERMELEC LTD.
    Inventors: Hideo Otsu, Makoto Okura
  • Publication number: 20220074058
    Abstract: The chamber frame element of the present invention, which has a smaller amount of voltage drop, consumes less reactive power than the prior art, and exhibits no metal corrosion, is a chamber frame element (14) for an electrolyzer or an electrodialysis cell. The chamber frame element (14) includes: a bag body (141); a frame (142) housed in an interior space of the bag body (141); and an inlet (143) and an outlet (144) to which piping can be attached, which are formed on the outer side of a region where the frame is housed in the bag body (141).
    Type: Application
    Filed: January 17, 2020
    Publication date: March 10, 2022
    Applicant: DE NORA PERMELEC LTD.
    Inventors: Hideo OTSU, Makoto OKURA
  • Patent number: 11236428
    Abstract: To provide an electrolysis cell for producing an organic chemical hydride capable of advancing a reduction reaction in a cathode of an organic compound having an unsaturated bond with high current efficiency and a small electric power consumption unit.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 1, 2022
    Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.
    Inventors: Shigenori Mitsushima, Yasutomo Takakuwa, Yoshinori Nishiki, Akihiro Kato, Akiyoshi Manabe
  • Patent number: 11035045
    Abstract: An organic hydride production apparatus that enables the reduction reaction at the cathode of an organic compound having an unsaturated bond to proceed at high current efficiency and at a low electric power consumption rate, and a method for producing an organic hydride that uses this production apparatus.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: June 15, 2021
    Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.
    Inventors: Shigenori Mitsushima, Yasutomo Takakuwa, Yoshinori Nishiki, Akihiro Kato, Akiyoshi Manabe
  • Patent number: 10914014
    Abstract: A diaphragm includes a porous supporting body and a polymer porous membrane. When one of surfaces of the porous membrane is defined as a surface A, the other surface opposite to the surface A is defined as a surface B, a section of the porous membrane parallel to the surfaces A and B is defined as a section C, an average pore diameter on the surface A is defined as an average pore diameter DA, an average pore diameter on the surface B is defined as an average pore diameter DB, and an average pore diameter on the section C is defined as an average pore diameter DC, the average pore diameters DA and DB are substantially equal to each other, and the average pore diameter DC is larger than each of the average pore diameters DA and DB.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: February 9, 2021
    Assignees: KAWASAKI JUKOGYO KABUSHIKI KAISHA, DE NORA PERMELEC LTD, THYSSENKRUPPP UHDE CHLORINE ENGINEERS (JAPAN) LTD.
    Inventors: Takafumi Ito, Ikuo Shimomura, Yuji Kamei, Akiyoshi Manabe, Akihiro Kato, Terumi Hashimoto
  • Patent number: 10889903
    Abstract: An anode for oxygen evolution that operates at a small overpotential and in a stable manner, and can be used favorably in an organic chemical hydride electrolytic synthesis apparatus. An anode 10 for oxygen evolution that evolves oxygen in a sulfuric acid aqueous solution containing a substance to be hydrogenated dissolved at a concentration higher than 1 mg/L, wherein an anode substrate 10a is composed of a valve metal, and an anode catalyst layer 10b containing at least one oxide, nitride or carbide of iridium, and at least one oxide, nitride or carbide of at least one metal selected from the group consisting of elements belonging to groups 4, 5 and 13 of the periodic table is formed on the surface of the anode substrate 10a.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: January 12, 2021
    Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.
    Inventors: Shigenori Mitsushima, Yasutomo Takakuwa, Awaludin Zaenal, Akihiro Kato
  • Patent number: 10760166
    Abstract: A sacrificial electrode attachment structure includes: a first pipe in which electrolyte flows; a second pipe which is formed of an insulating material and allows the electrolyte to flow; a cylindrical sacrificial electrode unit arranged between the first pipe and the second pipe so as to allow the electrolyte to flow, and including a sacrificial electrode that contacts the electrolyte; a first pipe joint adapted to liquid-tightly connect the first pipe to the sacrificial electrode unit in a detachable manner; and a second pipe joint adapted to liquid-tightly connect the second pipe to the sacrificial electrode unit in a detachable manner.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: September 1, 2020
    Assignee: DE NORA PERMELEC LTD
    Inventors: Hideo Otsu, Koji Yoshimura
  • Patent number: 10676831
    Abstract: The claimed invention provides an economical cathode for electrolysis and a method of manufacturing the same. The cathode includes a conductive base and a catalyst layer including a catalyst component. The conductive base, e.g. a wire mesh, includes plural intersection portions and is made of nickel. The cathode catalyst layer includes a catalyst component, such as platinum, and is formed by applying an application liquid to the base and drying and solidifying the liquid. The solidified portion of the applied liquid is not formed in the intersection portions of the base, or even if formed, the cross-sectional shape of the solidified portion has mesh-shaped pores with an average porosity of 15% or larger. The base is prepared by preheating to a temperature from 43° C. to 120° C. immediately before applying the application liquid, and thereafter the cathode catalyst layer is formed.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: June 9, 2020
    Assignee: DE NORA PERMELEC LTD
    Inventor: Atsumi Takeuchi