| Patent Number |
Title Of Patent |
Date Issued |
| 7569083 |
Gas diffusion electrode assembly, bonding method for gas diffusion electrodes, and electrolyzer |
August 4, 2009 |
| In a gas diffusion electrode assembly, and in an electrolyzer using the same, a bonding piece having on at least one surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alkyl ester of perfluorocarboxylic acid layer is positioned at its perfluoro compound |
| 7404878 |
Gas diffusion electrode assembly, bonding method for gas diffusion electrodes, and electrolyzer |
July 29, 2008 |
| In a gas diffusion electrode assembly, and in an electrolyzer using the same, a bonding piece having on at least one surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alkyl ester of perfluorocarboxylic acid layer is positioned at its perfluoro compound |
| 7303661 |
Electrode for electrolysis and ion exchange membrane electrolytic cell |
December 4, 2007 |
| A metal coil or an elastic cushion formed by winding the metal coil around a corrosion-resistant frame is sandwiched between an electrode and an electrode collector or a cell wall or is used as an electrode. The elasticity of the metal coil or the elastic cushion enables the easy han |
| 7048838 |
Ion exchange membrane electrolyzer |
May 23, 2006 |
| The invention provides an ion exchange membrane electrolyzer ensuring a satisfactory circulation of electrolyte, high electrolytic efficiency and great ridigity. An anode chamber partition in a flat sheet form is joined to a cathode chamber partition in a flat sheet form. An electrode |
| 7045041 |
Ion exchange membrane electrolyzer |
May 16, 2006 |
| The invention provides an ion exchange membrane electrolyzer. An electric current is passed through at least one electrode while the electrode is in contact with a plurality of comb-like flat leaf spring tags extending at an angle from a flat leaf spring form of retainer member located o |
| 6383349 |
Electrolytic cell using gas diffusion electrode and power distribution method for the electrolyt |
May 7, 2002 |
| An electrolytic cell using an oxygen cathode, for use in an ion-exchange membrane electrolytic soda process or the like, the electrolytic cell having; a structure, wherein, for effective supply and discharge of a caustic liquid and for an effective handling of a caustic liquid leakage, |
| 6372102 |
Method for reducing charge in gas diffusing electrode and its charge reducing structure |
April 16, 2002 |
| An electricity leading method for a gas diffusion electrode is provided, by which a gas diffusion electrode is easily fixed to a cathode current collecting frame, the contact part has reduced electrical resistance, even an electrically insulating mesh sheet can be utilized as a gas chamb |
| 6368473 |
Soda electrolytic cell provided with gas diffusion electrode |
April 9, 2002 |
| A sodium chloride electrolytic cell is provided, comprising a gas diffusion electrode that allows smooth supply and discharge of catholyte for electrolyzing sodium chloride and allows oxygen gas to come in good contact therewith. The sodium chloride electrolytic cell comprises an ano |
| 6312572 |
Electrolyzer |
November 6, 2001 |
| The present invention provides an ion exchange membrane type electrolyzer, which comprises electrodes at opposed positions via an ion exchange membrane, spacers are mounted in dot-like arrangement on openings of electrode surface to maintain spacing between the ion exchange membrane |
| 6200435 |
Ion exchange membrane electrolyzer |
March 13, 2001 |
| The present invention provides an electrolyzer, which comprises vertical type electrolyzer units with irregular surfaces formed on partition walls on anode side and on partition walls on cathode side, said irregular surfaces being overlapped on each other and integrated, and electrode |
| 6132591 |
Method for removal of sulfate groups and chlorate groups from brine |
October 17, 2000 |
| In removal of sulfate groups and chlorate groups from brine used for electrolysis, concentrated brine used in an electrolysis process or dilute brine whose concentration is decreased by electrolysis is fed to an anode chamber divided by a cation exchange membrane in a brine treating |
| 5965003 |
Method of decomposing CMPO |
October 12, 1999 |
| CMPO is safely, reliably and rapidly decomposed under mild conditions. A CMPO-containing substance is emulsified in an electrolyte comprising an oxidation promoter (silver ion) by an emulsifier in an emulsifying tank, this electrolyte comprising the CMPO-containing substance is supplied |
| 5935393 |
Apparatus for producing hypochlorite |
August 10, 1999 |
| The present invention provides an apparatus for producing hypochlorite of any concentration as desired by electrolysis and being easy to maintain. A hypochlorite reaction chamber is provided integrally with an electrolyzer, which is divided by a cation exchange membrane, and introducing |
| 5632847 |
Film removing method and film removing agent |
May 27, 1997 |
| The method of removing a film from a substrate (wafer) comprises a step of injecting ozone (13) into an acid aqueous solution (12) (e.g., a mixed liquid of dilute hydrogen fluoride aqueous solution and dilute hydrochloric acid); and a step of bringing bubbles (18) formed by the ozone |
| 5622613 |
Electrolytic method for manufacturing hypochlorite |
April 22, 1997 |
| The present invention provides a method for manufacturing hypochlorite efficiently, using an anode, which has a coating containing palladium oxide by 10 to 45 weight %, ruthenium oxide by 15 to 45 weight %, titanium dioxide by 10 to 40 weight %, and platinum by 10 to 20 weight % as well |
| 5523518 |
Recycling of waste sulfuric acid |
June 4, 1996 |
| Sulfuric acid used in the process of fabricating semiconductor devices, etc., can be recycled to reduce the amount of sulfuric acid to be discarded. A sulfuric acid effluent is fed to an anode chamber of a sulfuric acid-concentrating electrolyzer partitioned by at least one cation ex |
| 5494560 |
Low-hydrogen overvoltage cathode having activated carbon particles supporting platinum, rhodium, |
February 27, 1996 |
| Electroplating is carried out in a nickel plating bath in which are dispersed active carbon particles supporting at least one platinum metal selected from the group consisting of platinum, rhodium, iridium, and palladium, thereby forming on an electrode substrate a nickel electrode a |
| 5484514 |
Electrolyzer |
January 16, 1996 |
| An electrolyzer having a partition plate produced by forming thin plates. The electrolyzer includes a vertical electrolyzer unit which has a partition plate formed by superimposing a pair of anode- and cathode-side partitions provided with mutually fittable recesses and projections, and |
| 5405508 |
Method for regenerating tetraalkylammonium hydroxide |
April 11, 1995 |
| The present invention relates to a method for regenerating tetraalkylammonium hydroxide used as developer solution for positive type resist from waste developer solution. Waste solution from developer solution for positive type resist, which contains tetraalkylammonium hydroxide as p |
| 5399184 |
Method for fabricating gas diffusion electrode assembly for fuel cells |
March 21, 1995 |
| A method for fabricating an electrode assembly for solid polymer electrolyte fuel cells comprising a cation exchange membrane as the electrolyte and electrode catalyst layers, which utilizes specific perfuluorosulfonic acid copolymers for the cation exchange membrane and a binder use |
| 5378317 |
Method for removing organic film |
January 3, 1995 |
| The method for removing organic film according to the present invention is very effective for removing a photo resist film in a process for manufacturing semiconductor device. A substrate (32) having a photo resist film (31) formed on it is processed in a wet processing tank (34) filled |
| 5360526 |
Electrolytic cell |
November 1, 1994 |
| An electrode (14) is joined to ridges (12) or ribs of a partition (11) by means of spring members (13), each being in comb form and bent at the toothed portions (16) thereof, so that, while the electrode surface is kept flat, the toothed portions (16) can be held with any desired distanc |
| 5354434 |
Method for regenerating tetraalkylammonium hydroxide |
October 11, 1994 |
| Waste solution of developer, used as developer for a positive type photo resist and containing tetraalkylammonium hydroxide is neutralized with carbon dioxide, and it is filtered through a separation membrane. After removing precipitates of insoluble organic substances, it is sent to an |
| 5314591 |
Electrolyzer and method of production |
May 24, 1994 |
| An electrolyzer includes a stack composed of a plurality of upright electrolytic cell units, each unit including an electrolytic cell unit frame bounding a pair of electrode sheets. Each pair of electrode sheets are anode-side and cathode-side partitions having opposed recesses and p |
| 4775452 |
Process for dissolution and recovery of noble metals |
October 4, 1988 |
| Disclosed herein is a process for dissolving and recovering noble metals form used catalysts. Noble metal components are leached out from particles supporting or containing at least one noble metal or noble metal compound by subjecting particles them to electrolysis, with the electrolyte |
| 4663013 |
Cation exchange membrane |
May 5, 1987 |
| A method of bonding a cation exchange membrane of the type having a perfluorosulfonic acid group on one face and a perfluorocarboxylic acid group on the other face, with a reinforcing mesh material embedded therein and a fluorine-containing resin sheet is disclosed. |
| 4654135 |
Electrolytic cell for sea water |
March 31, 1987 |
| A cell is disclosed whereby sea water is electrolyzed to form an aqueous hypochlorite solution with reduced formation of interfering deposits on the electrodes. The cell comprises a plurality of electrolytic cell units having a pair of cathodes and an anode placed between said cathodes, |
| 4626331 |
Electrolytic cell employing fluidized bed |
December 2, 1986 |
| In an electrolytic cell of the type which includes a cylindrical electrolytic cell main body divided into a main electrode chamber and an auxiliary electrode chamber by a diaphragm, and having main electrode particles in the main electrode chamber, which are maintained in the fluidiz |
| 4622113 |
Process for producing caustic alkalis |
November 11, 1986 |
| Process or producing caustic alkalis or alkali hydroxides by electrolysis, employing a double electrode-type electrolysis tank in which a cation exchange membrane is provided to divide the inside of the tank into cathode and anode compartments, supplying to the anode compartment an a |
| 4605685 |
Method for preparation of graft polymeric membranes |
August 12, 1986 |
| A method for the preparation of a graft polymer membrane comprising an inactive polymer film having TFS as a graft chain. The inactive polymer film is irradiated with ionizing radiation, and the resulting irradiated film is graft-polymerized by contacting said film with TFS.This product |
| 4569729 |
Electrolyzing method and electrolytic cell employing fluidized bed |
February 11, 1986 |
| In an electrolytic cell of the type which includes a cylindrical electrolytic cell main body divided into a main electrode chamber and an auxiliary electrode chamber by a diaphragm, and having main electrode particles in the main electrode chamber, which are maintained in the fluidiz |
| 4465580 |
Cathode for use in electrolysis |
August 14, 1984 |
| A cathode for use in electrolysis comprising (1) a corrosion-resistant electrically conductive substrate; and (2) a coating thereon of (a) nickel or an alloy of nickel, and (b) fine particles of a platinum-group metal, a platinum-group metal oxide or a mixture thereof uniformly dispersed |
| 4448664 |
Anode for electrolysis |
May 15, 1984 |
| An anode for electrolysis includes an electrically conductive bar erected on an electrolytic cell bottom plate, opposed anode bodies connected to the electrically conductive bar through anode supporting bodies, and reinforcing bodies provided between the opposed anode bodies and outside |
| 4421614 |
Method of bypassing electric current of electrolytic cells |
December 20, 1983 |
| The method for bypassing the electric current of at least one cell of an electrolytic apparatus includes a series combination of a resistor and a switch connected in parallel to the terminals of the cell to be repaired or replaced. In another embodiment a plurality of said series combina |
| 4417970 |
Electrolytic cell for ion exchange membrane method |
November 29, 1983 |
| An electrolytic cell having a plurality of porous and tubular cathodes, a plurality of porous anodes and a plurality of bag-shaped molds being formed by a cation exchange membrane in at least the portions facing and between the vertical faces of the anode and cathodes. The anode acco |
| 4409084 |
Electrolytic cell for ion exchange membrane method |
October 11, 1983 |
| An electrolytic cell for the ion exchange membrane method, which comprises:(a) an electrolytic cell main body;(b) a lid covering the(c) porous and hollow tubular cathodes disposed in the body;(d) a bottom plate having apertures through which an electrically conductive bar can be extended;(e) ele |
| 4396727 |
Cation exchange membrane and process for producing the same |
August 2, 1983 |
| A uniform cation exchange membrane having a certain fluorovinyl sulfonic acid monomer grafted onto a certain high-molecular substrate film which exhibits small electrical resistance and great physical strength is herein disclosed. |
| 4384941 |
Process for electrolyzing water |
May 24, 1983 |
| A process is, herein, disclosed for electrolysis or pure water in an electrolytic cell which is divided into an anode compartment and a cathode compartment by a cation exchange membrane and in which pure water is supplied to the anode compartment for electrolysis to generate oxygen in |
| 4317709 |
Apparatus for electrolyzing an aqueous solution |
March 2, 1982 |
| In an apparatus for electrolyzing an aqueous solution, which includes a plurality of electrolytic cells disposed at a plurality of vertically spaced levels and divided by partitions from one another, each of said cells having at least one anode and at least one cathode, said cells in |
| 4295953 |
Filter press type ion exchange membrane-method electrolysis cell |
October 20, 1981 |
| A filter-press type ion exchange membrane-method electrolysis cell comprising(a) an anode structure which comprises a rectangular anode frame including a top element, a bottom element and two side elements and anode plates welded to the anode frame,(b) a cathode structure which comprises |
| 4294628 |
Method for the production of cathode for use in electrolysis |
October 13, 1981 |
| A cathode for use in electrolysis comprising (1) a substrate of iron or an alloy thereof; (2) a compact interlayer of Fe.sub.3 O.sub.4 formed on the substrate, and (3) a coating of activating nickel comprising principally nickel or an alloy thereof formed on the Fe.sub.3 O.sub.4 layer. I |
| 4235684 |
Process for producing glyoxalic acid by electrolytic oxidation |
November 25, 1980 |
| A process for producing glyoxalic acid which comprises electrolytically oxidizing glyoxal in an electrolytic cell comprising at least one anode, at least one cathode and at least one cation exchange membrane therebetween to define an anode compartment(s) and a cathode compartment(s) |
| 4194670 |
Method of making a bipolar electrode |
March 25, 1980 |
| A bipolar electrode comprising(a) an electrode frame;(b) a partition wall welded to the electrode frame (a) and comprising a composite structure of an anode-side sheet and a cathode-side sheet;(c) an anode plate disposed on the anode-side of the partition wall (b);(d) a cathode plate disposed on |
| 4176168 |
Process for producing chlorine dioxide |
November 27, 1979 |
| A process for producing chlorine dioxide which comprises(1) feeding hydrochloric acid and an excess on a stoichiometric basis of sodium chlorate produced in an electrolytic cell for producing sodium chlorate into a reaction zone for producing chlorine dioxide;(2) reacting the hydrochloric ac |
| 4173525 |
Electrolytic cell for electrolysis of sea water |
November 6, 1979 |
| An electrolytic cell for electrolysis of sea water comprisinga housing having an opening at the bottom and top of the housing for in-flow of sea water and out-flow of electrolyzed sea water, respectively;a plurality of flat plate-like anodes vertically disposed in the housing with the major |
| 4151052 |
Process for producing sodium hypochlorite |
April 24, 1979 |
| A process for producing sodium hypochlorite comprising electrolyzing an aqueous solution of sodium chloride as an electrolyte solution in a non-diaphragm electrolytic cell comprising at least one unit cell in which the ratio of the actual area of the anode to the actual area of the c |
| 4141815 |
Bipolar electrode |
February 27, 1979 |
| A bipolar electrode comprising(a) an electrode frame;(b) a partition wall welded to the electrode frame (a) and comprising a composite structure of an anode-side sheet and a cathode-side sheet;(c) an anode plate disposed on the anode-side of the partition wall (b);(d) a cathode plate disposed on |
| 4139449 |
Electrolytic cell for producing alkali metal hypochlorites |
February 13, 1979 |
| A process for producing an alkali metal hypochlorite which comprises electrolyzing an aqueous solution of an alkali metal chloride in an electrolytic cell including a plurality of unit cells, each equipped with at least one anode and at least one cathode, in which the unit cells are |
| 4116805 |
Bipolar electrode |
September 26, 1978 |
| A bipolar electrode comprisingA. an anode member comprising a substrate made of an anticorrosive metal or metal alloy and an electrically conductive coating formed on the surface thereof;B. a cathode member comprising a metal or a metal alloy;C. a partition wall for separating the anode memb |
