US Pat. No. 9,297,085

MEMBRANE-ELECTRODE ASSEMBLY, ELECTROLYTIC CELL EMPLOYING THE SAME, ELECTROLYTIC-WATER SPRAYER, AND METHOD OF STERILIZATION

DE NORA PERMELEC LTD., K...

1. An electrolytic cell which comprises:
a membrane-electrode assembly, which comprises an electrode chamber having at least one opening;
a feeder wire-fixing tube fitted to the at least one opening of the electrode chamber of the membrane-electrode assembly;
a feeder wire fixed between the at least one opening and the feeder wire-fixing tube,
wherein the membrane-electrode assembly comprising at least one rod-form electrode placed in a diaphragm which is preformed
into a tube, thereby forming a tubular diaphragm;

the tubular diaphragm disposed around the periphery of the rod-form electrode; and
a wire-form counter electrode spirally wound around the periphery of the tubular diaphragm,
the tubular diaphragm being fixed to the rod-form electrode with the wire-form counter electrode so that the tubular diaphragm
is in contact with at least a part of the rod-form electrode and the tubular diaphragm is in contact with at least a part
of the wire-form counter electrode to thereby form the electrode chamber,

the electrode chamber having a spiral shape and having a gas/liquid passage between the tubular diaphragm and the rod-form
electrode,

wherein the rod-form electrode is an anode and the counter electrode is cathode,
wherein the rod-form electrode comprises diamond, and
wherein the wire-form counter electrode is spirally wound at a pitch of 1-10 mm.

US Pat. No. 9,903,031

PRODUCTION METHOD FOR ELECTRODE FOR ELECTROLYSIS

DE NORA PERMELEC LTD, Fu...

1. A method for manufacturing an electrolytic electrode comprising:
forming an electrode catalyst layer comprising an electrode catalyst component on each of a front surface and a back surface
of a conductive electrode substrate having a plurality of holes, the forming the electrode catalyst comprising:

applying a coating solution comprising a starting material of the electrode catalyst component to the front surface of the
conductive electrode substrate, and thereafter

drying and firing the coating solution,
wherein the conductive electrode substrate is in at least one form selected from the group consisting of an expanded mesh,
a punched perforated plate, and a wire netting, provided that the conductive electrode substrate is not a fired body obtained
by firing metal powder or metal fiber and a metal woven fabric,

the electrode catalyst layer formed on the back surface of the conductive electrode comprises the catalyst component in the
coating solution that has been applied to the front surface of the conductive electrode and has migrated to the back surface
of the conductive electrode by passing through the plurality of holes in the conductive electrode substrate,

the conductive electrode substrate comprises at least one metal selected from the group consisting of titanium, tantalum,
niobium, zirconium, hafnium, and nickel, and alloys thereof,

a thickness of the conductive electrode substrate is in a range from 0.5 mm to 3.0 mm
the electrode catalyst component comprises at least one material selected from the group consisting of platinum, iridium,
ruthenium, palladium, osmium, and oxides thereof,

in the forming the electrode catalyst layer, the conductive electrode substrate is at least once subjected to a preheating
treatment in which the conducive electrode substrate is preheated to a preheating temperature higher than room temperature
immediately before the applying the coating solution to the front surface of the substrate, and

a ratio (AB) of an amount (A) of the electrode catalyst component adhering to the front surface of the conductive electrode
substrate relative to an amount (B) of the electrode catalyst component adhering to the back surface of the conductive electrode
substrate is controlled to be within a range from 1.5 to 6.8 by selecting the preheating temperature.

US Pat. No. 9,818,496

METHOD FOR TREATING TRITIUM-WATER-CONTAINING RAW WATER

DE NORA PERMELEC LTD, Fu...

1. A method for treating tritium water-containing raw water by which tritium water-containing raw water is treated by a first
alkali water electrolysis step comprising the steps of:
(1) supplying a part of raw water containing tritium water and alkali water to a circulation tank;
(2) mixing the raw water with the alkali water in the circulation tank to obtain an electrolyte adjusted so as to have a desired
alkali concentration, supplying the electrolyte to an alkali water electrolysis device, and performing electrolysis treatment;

(3) supplying the raw water continuously to the circulation tank in an amount which corresponds to raw water lost by the above
electrolysis treatment to maintain alkali concentration at an adjusted initial concentration, and continuing the electrolysis
treatment while circulating the electrolyte in order to continuously perform the alkali water electrolysis treatment;

(4) gasifying the raw water to tritium-containing hydrogen gas and oxygen gas so that tritium concentration is diluted to
1/1,244 relative to tritium concentration in the raw water; and

(5) reducing the volume of the raw water.

US Pat. No. 10,053,787

ELECTROLYTIC CATHODE STRUCTURE AND ELECTROLYZER USING THE SAME

DE NORA PERMELEC LTD, Fu...

1. An electrolytic cathode structure in which a metal elastic cushion member is compressed and accommodated between an activated cathode and a cathode current collector, wherea surface layer of the cathode current collector includes a material that consumes more than 0.08 F/m2 oxidation current at lower than 0v vs. Hg—HgO potential in an alkaline solution, wherein at least the surface layer of the cathode current collector is made of activated carbon-nickel composite plating,
and wherein at least a surface layer of the cathode current collector consumes a larger oxidation current per unit area than the activated cathode.

US Pat. No. 10,202,698

DEVICE FOR MANUFACTURING ORGANIC HYDRIDE

Yokohama National Univers...

1. A device for producing an organic hydride comprising:a solid polymer electrolyte membrane having proton conductivity;
a cathode that is provided on a surface of the solid polymer electrolyte membrane and contains an electrolytic-hydrogenation catalyst for reducing a substance to be hydrogenated to produce a hydride;
a cathode chamber that accommodates the cathode and into which the substance to be hydrogenated is supplied;
an anode that is provided above another surface of the solid polymer electrolyte membrane and contains an electrode catalyst for oxidizing water to produce protons; and
an anode chamber that accommodates the anode and into which an electrolytic solution is supplied, wherein
a gap is formed between the anode and the electrolyte membrane,
wherein the electrode catalyst includes a solid solution of iridium oxide and tantalum oxide,
wherein the anode has a network structure with an aperture ratio of 30 to 70%, and has an electrical supply supporting material formed of an electronic conductor and the electrode catalyst held by the electrical supply supporting material,
wherein the anode has a rhombic aperture shape with a distance between centers in a short direction of 0.1 to 4 mm and a distance between centers in a long direction of 0.1 to 6 mm, and
wherein the gap is 0.02 to 0.2 mm.

US Pat. No. 10,381,172

ELECTRODE PRODUCTION METHOD

DE NORA PERMELEC LTD, Fu...

1. A method for manufacturing an electrode, the method comprising:holding an electrode substrate having a rectangular plate-like shape, being formed with attachment portions at two ends including opposing sides of the electrode substrate so that the electrode substrate is in a suspended state by a suspension jig and a lower jig at the attachment portions; and
performing at least heat treatment on a flat electrode formation surface of the suspended electrode substrate so as to manufacture an electrode surface that is to be an electrode,
wherein the attachment portions are independently formed at the ends each including one side of the electrode substrate, and each of the attachment portions is formed by linearly bending two parts so that each part has an overall even side, and each of the attachment portions includes a first planar portion that protrudes from the electrode formation surface as a first bent portion is formed by bending the electrode substrate in one surface of the electrode substrate; and a second planar portion that includes the one side as an edge and that is formed as a second bent portion is formed by bending an end of the first planar portion so as not to oppose the electrode formation surface and to face the same direction as the electrode formation surface, and
wherein the suspension jig includes at least a placement portion having a planar shape, being configured to place the first planar portion; and a movement restriction portion having a contact surface with which the edge at a leading end of the second planar portion comes into contact, and
wherein the lower jig includes at least a contact portion having a planar shape with which the first planar portion comes into contact; and a movement restriction portion having a contact surface with which the edge at the leading end of the second planar portion comes into contact;
inserting one of the attachment portions into the suspension jig; and inserting the other attachment portion into the lower jig so as to perpendicularly suspend the electrode substrate with the suspension jig, thereafter performing at least the heat treatment on the electrode formation surface while maintaining the electrode substrate in a suspended state.

US Pat. No. 10,053,380

ELECTROLYSIS DEVICE AND APPARATUS FOR PRODUCING ELECTROLYZED OZONATED WATER

AQUAECOS LTD., Yokohama-...

1. An electrolysis device comprising:an electrolysis cell formed in a manner that a membrane-electrode assembly, which comprises an anode, a cathode, and a solid polymer electrolyte separation membrane, is compressed from both sides so as to adhere the anode, the cathode, and the solid polymer electrolyte separation membrane formed of a cation exchange membrane to each other,
wherein the membrane-electrode assembly is configured to adhere the anode and the cathode to both surfaces of the solid polymer electrolyte separation membrane formed of the cation exchange membrane; and
an inflow port that supplies raw water composed of unpurified water containing alkaline earth metal, to at least one of the anode and the cathode,
wherein the electrolysis device is configured to mix an anolyte generated on the anode with a catholyte generated on the cathode in the electrolysis device,
a porous conductive metallic material, which has flexibility and in which multiple fine voids are provided is used as the cathode, and
scale, which is substantially formed of hydroxide of the alkaline earth metal is stored in the fine void in the cathode so as to prevent localized deposition of the scale which is substantially formed of hydroxide of the alkaline earth metal at a contact interface between the cathode and the solid polymer electrolyte separation membrane.

US Pat. No. 10,655,234

METHOD FOR PRODUCING ANODE FOR ALKALINE WATER ELECTROLYSIS, AND ANODE FOR ALKALINE WATER ELECTROLYSIS

DE NORA PERMELEC LTD, Fu...

1. A method for producing an anode for alkaline water electrolysis, the method comprising:dissolving lithium nitrate and a nickel carboxylate in water so as to obtain an aqueous solution comprising lithium ions and nickel ions,
applying the aqueous solution to a surface of a conductive substrate, wherein at least the surface of the substrate comprises nickel or a nickel-based alloy, and
subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from 450° C. to 600° C., thereby forming a catalyst layer comprising a lithium-containing nickel oxide on the conductive substrate,
wherein the lithium-containing nickel oxide is represented by a compositional formula LixNi2?xO2, wherein x is 0.02?x?0.5.

US Pat. No. 10,407,781

ELECTROLYSIS APPARATUS AND ELECTROLYSIS METHOD

DE NORA PERMELEC LTD, Fu...

1. An electrolytic apparatus comprising:an anode chamber that houses an anode and generates anode gas;
a cathode chamber that houses a cathode and generates hydrogen gas;
a diaphragm that separates the anode chamber and the cathode chamber from each other, and
an anode side circulation line that discharges an electrolytic solution from the anode chamber and returns the electrolytic solution to the anode chamber,
wherein the anode side circulation line comprises:
an anode side discharge line that discharges the electrolytic solution and the anode gas from the anode chamber;
an anode side gas-liquid separation unit that separates the anode gas from the electrolytic solution discharged from the anode side discharge line; and
an anode side supplying line that discharges the electrolytic solution from the anode side gas-liquid separation unit, and returns the electrolytic solution to the anode chamber,
the electrolytic apparatus further comprises a circulation tank that stores the electrolytic solution, and a circulation pump that circulates the electrolytic solution in the circulation tank, both of which are disposed in a middle of the anode side supplying line,
the electrolytic apparatus further comprises an anode gas feeding line that connects the anode side gas-liquid separation unit to a gas phase region formed in an upper part in the circulation tank,
wherein the anode gas is mixed in the circulation tank, with hydrogen gas derived from dissolved hydrogen gas and existing as a gas phase,
the anode gas feeding line feeds at least part of the anode gas separated by the anode side gas-liquid separation unit to the gas phase region, and
the concentration of the hydrogen gas in the gas phase region is less than a lower limit value of explosion limit.

US Pat. No. 10,590,551

ELECTRODE FOR ELECTROLYSIS, MANUFACTURING METHOD OF ELECTRODE FOR ELECTROLYSIS, AND ELECTROLYZER

DE NORA PERMELEC LTD, Fu...

1. An electrode for electrolysis comprising:a conductive substrate on which a catalyst layer is formed, and
at least one reverse current absorption body that is coupled to the conductive substrate in a detachable manner, wherein
the at least one reverse current absorption body is formed from a sintered compact containing nickel, and
wherein the at least one reverse current absorption body does not comprise a substrate.

US Pat. No. 10,622,659

WATER TREATMENT SYSTEM USING ALKALINE WATER ELECTROLYSIS DEVICE AND ALKALINE FUEL CELL

DE NORA PERMELEC LTD, Fu...

1. A water treatment system using an alkaline water electrolytic device and an alkaline fuel cell, configured to have following features,(1) the alkaline water electrolytic device and the alkaline fuel cell are connected to each other,
(2) an electrolytic solution obtained by mixing raw water, which is water to be treated by the alkaline water electrolytic device, and an alkaline aqueous solution so as to form a mixture and adjusting the mixture to have a desired alkali concentration, an amount of water corresponding to an amount of the raw water lost through an electrolytic treatment are fed to the alkaline water electrolytic device, and the electrolytic treatment is performed continuously while an alkali concentration is maintained at the initial desired concentration, and the electrolytic solution is circulated, a volume of the raw water is reduced, an oxygen gas is generated from an anode chamber of the alkaline water electrolytic device, and a hydrogen gas is generated from a cathode chamber of the alkaline water electrolytic device,
(3) the electrolytic solution formed of the alkaline aqueous solution adjusted to have the desired alkali concentration, the oxygen gas and the hydrogen gas generated by the alkaline water electrolytic device are fed to the alkaline fuel cell, at least part of the oxygen gas and the hydrogen gas is used to generate electric power by the alkaline fuel cell, and electric energy and water are collected, and
(4) the collected electric energy is fed to the alkaline water electrolytic device as an electric power source thereof, part or all of the collected water is fed to a circulation line of the electrolytic solution in the alkaline water electrolytic device, and the electrolytic treatment is continued,
whereby most or part of electric power energy required in each of the alkaline water electrolytic device and the alkaline fuel cell, the hydrogen gas and the oxygen gas serving as raw materials for generating the electric power energy, and the amount of the water corresponding to the raw water lost through the electrolytic treatment is recycled in the water treatment system.

US Pat. No. 10,619,253

METHOD FOR ELECTROLYZING ALKALINE WATER

DE NORA PERMELEC LTD, Fu...

1. An alkaline water electrolysis method for electrolyzing an alkaline electrolytic solution using an alkaline water electrolyzer having an anode chamber housing an anode, a cathode chamber housing a cathode, and a diaphragm separating the anode chamber from the cathode chamber, the method comprising:performing alkaline water electrolysis in the alkaline water electrolyzer, including storing the alkaline electrolytic solution in a circulation tank, feeding the electrolytic solution stored in the circulation tank to the anode chamber and to the cathode chamber, returning a cathode-side electrolytic solution generated in the cathode chamber and an anode-side electrolytic solution generated in the anode chamber to the circulation tank, mixing together the cathode-side electrolytic solution and the anode-side electrolytic solution in the circulation tank, and circulating the mixed electrolytic solution between the cathode chamber and the circulation tank and between the anode chamber and the circulation tank; and
adding a catalyst activation material comprising a metal salt soluble in the electrolytic solution prior to starting of the performing of the alkaline water electrolysis,
wherein in the performing of the alkaline water electrolysis, a metal component in the catalyst activation material is deposited on a surface of the cathode, and
during a period in which the alkaline water electrolysis is not performed, a reverse current flows to cause the metal component in the catalyst activation material to be deposited on a surface of the anode.

US Pat. No. 10,619,255

ANODE FOR ALKALINE WATER ELECTROLYSIS AND METHOD FOR PRODUCING ANODE FOR ALKALINE WATER ELECTROLYSIS

DE NORA PERMELEC LTD, Fu...

1. An anode for alkaline water electrolysis comprising:a conductive substrate having at least a surface that comprises nickel or a nickel-based alloy; and
an electrode catalyst layer formed on the surface of the conductive substrate,
wherein the electrode catalyst layer has a layered structure comprising a first catalyst layer and a second catalyst layer, wherein
the first catalyst layer comprises: a first catalyst component comprising a lanthanide-nickel-cobalt perovskite oxide represented by a structural formula XNiaCo1-aO3, wherein X represents at least one lanthanide selected from the group consisting of lanthanum, cerium, and praseodymium, and a satisfies 0 the second catalyst layer comprises: a second catalyst component comprising at least one material selected from the group consisting of iridium oxide and ruthenium oxide, and
the first catalyst layer is formed on the surface of the conductive substrate, and the second catalyst layer is formed on a surface of the first catalyst layer.