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| Number | Title | Issue Date |
| 7323090 | Bipolar zero-gap type electrolytic cell 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 μm une... | 01/29/2008 |
| 7303661 | Electrode for electrolysis and ion exchange membrane electrolytic cell 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 en... | 12/04/2007 |
| 7264701 | Reference electrode with non-blocking liquid junction A reference electrode traps silver ions and chloro complex ions leaching to an internal filling solution so that the blocking of the liquid junction can be prevented. A silver/silver chloride electrode can be provided as an internal electrode in an internal filling ... | 09/04/2007 |
| 7261798 | Assembly for maintaining compression for electrical contact of the active area of an electrochemical cell An electrochemical cell structure has a first fluid chamber and a resilient member disposed in the first fluid chamber. An opening permits communication of fluid into the first fluid chamber. An anode cavity and a cathode cavity are in fluid communication with the f... | 08/28/2007 |
| 7255798 | Recycling of used perfluorosulfonic acid membranes A method for recovering and recycling catalyst coated fuel cell membranes includes dissolving the used membranes in water and solvent, heating the dissolved membranes under pressure and separating the components. Active membranes are produced from the recycled mater... | 08/14/2007 |
| 7163964 | Method for preparing an ion exchange media This invention presents an ion exchange media including a plurality of cation exchange zones and anion exchange zones in flow paths that are contained in a substantially nonporous resin transport framework. During electrodeionization and other potential applications... | 01/16/2007 |
| 7112383 | Binder for electrodes The present invention is directed to a binder for electrode materials which comprises tetrafluoroethylene polymer fine particles having an average particle size of not more than about 0.20 μm and having a standard specific gravity of not more than about 2.20, where... | 09/26/2006 |
| 6203687 | Method for shutting down an electrolysis cell with a membrane and an oxygen-reducing cathode The invention relates to a method for shutting down an electrolysis cell with a membrane and an oxygen-reducing cathode, which comprises, after the electrical power and oxygen supplies have been disconnected, in emptying the oxygen compartment and filling... | 03/20/2001 |
| 6080298 | Method for electrolysing a brine Electrolysing an aqueous solution of sodium chloride by means of a cell comprising a cation-exchange membrane which divides the cell into an anode compartment and an cathode compartment in which the said cathode is placed directly against the cation-excha... | 06/27/2000 |
| 5755951 | Regeneration of plastic diaphragm A process for the regeneration of plastic diaphragms is described, in which a mineral acid solution is mixed with a suitable corrosion inhibitor, this mixture is temperature controlled at from approximately 0° to 100° C., preferably 40° to 80° C., in ... | 05/26/1998 |
| 5693213 | Electrolytic process of salt water A salt water electrolysis process for electrolyzing an aqueous alkali chloride solution capable of preventing the deterioration of a gas diffusion cathode is disclosed. A cation-exchange membrane having closely disposed to one surface thereof an insoluble... | 12/02/1997 |
| 5498321 | Electrolysis cell diaphragm reclamation There is now disclosed a method of restoring a used article utilized in electrolysis, such as in a chlor-alkali cell. The used article is usually the cell diaphragm, but may be a cell electrode, particularly when it is in assembly with the cell diaphragm.... | 03/12/1996 |
| 5401367 | Chlor-alkali diaphragm electrolysis process and relevant cell In a process of chlor-alkali electrolysis carried out in a diaphragm cells comprising pairs of interleaved anodes and cathodes, the cathodes being provided with openings and coated with a porous diaphragm resistant to corrosion, at least part of the said ... | 03/28/1995 |
| 5205911 | Cathode restoration Chlor-alkali electrolytic cells can have separators used with metal cathodes. These cells may often be subject to frequent current interruptions. Particularly where the cathode and separator exhibit extended life, these interruptions may be numerous. Ther... | 04/27/1993 |
| 5188712 | Diaphragm for use in chlor-alkali cells A liquid permeable diaphragm for use in an electrolytic chlor-akali cell, the diaphragm being made of fibrous material and having deposited thereon and cementitiously bonded to the anode face thereof at least one topcoating of inorganic, particulate, refr... | 02/23/1993 |
| 5015344 | Electrodes with dual porosity An electrode comprising a gas permeable and liquid permeable coating bonded to an ion exchange membrane, said coating comprising low overvoltage electrocatalytic particles, more electroconductive electrolyte resistant particles and an electrolyte resistan... | 05/14/1991 |
| 4869793 | Method of preparing an asbestos diaphragm An electrolyte permeable diaphragm consisting essentially of asbestos is prepared by depositing asbestos and a porosity control agent selected from the group of cellulosic-type materials, e.g., starch, cellulose or rayon, infusible thermoset polymer mater... | 09/26/1989 |
| 4822544 | Dry process for fabricating a unitary membrane-electrode structure A process for fabricating a unitary membrane-electrode structure by attaching an electrode to a permselective membrane while the latter is in a non-hydrated (and essentially non-dissociated) form. The electrode, in the form of a bonded aggregate of cataly... | 04/18/1989 |
| 4802960 | Electrochemical cell and process employing a biasing electrode In an electrolysis cell, a separator having a buried wire screen is disclosed. The screen is connected to a bias voltage source to repel unwanted ionic migration across the screen and hence the separator.... | 02/07/1989 |
| 4792388 | Electrolysis method of electrolyzing halides A cell is provided having an anode and cathode separated by an ion permeable membrane or diaphragm wherein an electrode layer is bonded to or otherwise embedded in on at least one and usually to both sides of the membrane. Polarity is imparted to a bonded... | 12/20/1988 |
| 4778578 | Deposition of catalytic electrodes of ion-exchange membranes A gas and electrolyte permeable metal layer is bonded to an ion-permeable membrane by electroless deposition to produce a permeable metal deposit upon the membrane or diaphragm. Advantageously, the membrane surface to be coated is pretreated with an ampho... | 10/18/1988 |
| 4772364 | Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membrane A halogen, such as chlorine, is generated by electrolysis of an aqueous solution of an alkali metal halide such as sodium chloride, in a cell having anolyte and catholyte chambers separated by a solid polymer electrolyte in the form of a stable, selective... | 09/20/1988 |
| 4749452 | Multi-layer electrode membrane-assembly and electrolysis process using same A unitary membrane-electrode assembly includes an electrode structure with multiple layers having different overvoltages for the desired electrochemical reaction. In the preferred arrangement the layer attached to the membrane has the higher overvoltage t... | 06/07/1988 |
| 4722773 | Electrochemical cell having gas pressurized contact between laminar, gas diffusion electrode and current collector An electrochemical cell having a hydraulically impermeable permselective membrane located between electrodes comprising at least one gas diffusion, laminar electrode having hydrophilic and hydrophobic layers and attendant current collector means is operat... | 02/02/1988 |
| 4693797 | Method of generating halogen and electrolysis cell An electrolysis cell comprising a cell housing containing at least one pair of oppositely charged electrodes separated by an ion exchange diaphragm characterized in that at least one of said electrodes comprises an electrodically charged electroconductive... | 09/15/1987 |
| 4666573 | Synthetic diaphragm and process of use thereof A non-asbestos, electrolyte permeable diaphragm fabricated of thermoplastic organic polymer material containing ion exchange functional groups or precursor groups thereof is disclosed. The diaphragm can be prepared by providing a slurry of the organic pol... | 05/19/1987 |
| 4602984 | Monopolar electrochemical cell having a novel electric current transmission element The invention is a monopolar electrochemical cell assembly of the type having two end members and at least one electrode unit positioned between said end members, said unit at least having: two substantially parallel, substantially planar electrode components ... | 07/29/1986 |
| 4571288 | Process for the electrolysis of aqueous alkali metal chloride solution A process for electrolysis of an electrolyte, e.g. aqueous alkali metal chloride solution in an electrolytic cell comprising a plurality of anodes and cathodes and separators positioned between adjacent anodes and cathodes to form in the cell a plurality ... | 02/18/1986 |
| 4569735 | Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membrane A halogen, such as chlorine, is generated by electrolysis of an aqueous solution of an alkali metal halide such as sodium chloride, in a cell having anolyte and catholyte chambers separated by a solid polymer electrolyte in the form of a stable, selective... | 02/11/1986 |
| 4536263 | Process for generating halogen using novel electrolysis cell An electrolysis cell comprising a housing containing a plurality of alternating anode units and cathode units and an ion permeable membrane sheet disposed therebetween and having in direct contact with the opposite sides of the membrane sheet a porous ano... | 08/20/1985 |
| 4526663 | Method for electrolysis of aqueous alkali metal chloride solution The electrolysis of an aqueous alkali metal chloride solution in electrolytic cells of the type having anode compartments and cathode compartments separated by a cation-exchange membrane is performed with improved efficiency by positioning and maintaining... | 07/02/1985 |
| 4486276 | Method for suppressing hydrogen formation in an electrolytic cell A method of operating an electrolytic cell in which cathodic hydrogen formation is suppressed by contacting the catalytic cathode with air or other oxygen-containing gas. The cells are of two types: (1) those in which a membrane is present as a distinct b... | 12/04/1984 |
| 4457815 | Electrolytic cell, permionic membrane, and method of electrolysis Disclosed is a permionic membrane having a porous film of surface and electrocatalyst on at least one surface thereof. Also disclosed is an electrolytic cell with the permionic membrane, an electrolytic process utilizing the permionic membrane, and an ele... | 07/03/1984 |
| 4421579 | Method of making solid polymer electrolytes and electrode bonded with hydrophyllic fluorocopolymers A solid polymer electrolyte (SPE), solid polymer electrolyte electrode, and method for forming from cationic exchange perfluorocarbon copolymer. Disclosed are solution techniques for forming SPEs and SPE electrodes using fluorocarbon vinyl ether copolymer... | 12/20/1983 |
| 4417959 | Electrolytic cell having a composite electrode-membrane structure A novel electrolytic cell for the electrolysis of aqueous solutions of alkali metal chlorides which comprises a cell housing containing a pair of electrodes of opposite polarity. A hydraulically impermeable ion exchange membrane is positioned between and ... | 11/29/1983 |
| 4381979 | Electrolysis cell and method of generating halogen Halogen is produced by electrolyzing an aqueous halide in a specially designed cell. The cell comprises an anolyte chamber and a catholyte chamber separated by a permeable membrane or diaphragm, notably an ion exchange (generally cation exchange) polymer.... | 05/03/1983 |
| 4370209 | Electrolytic process including recovery and condensation of high pressure chlorine gas Discloses the electrolysis of aqueous alkali metal halides while maintaining the anolyte compartment at an elevated pressure, whereby to recover chlorine therefrom at a superatmospheric partial pressure. The superatmospheric partial pressure chlorine gas ... | 01/25/1983 |
| 4360416 | Anode catalysts for electrolysis of brine A gas generating apparatus and method is described which utilizes a novel catalytic halogen evolving electrode for electrochemical systems, such as an electrolysis cell for the generation of chlorine. The electrochemical cells include a catalytic cathode ... | 11/23/1982 |
| 4341604 | Novel electrolysis process An electrolysis cell comprising a housing containing a plurality of alternating anode units and cathode units and an ion permeable membrane sheet disposed therebetween and having in direct contact with the opposite sides of the membrane sheet a porous ano... | 07/27/1982 |
| 4340452 | Novel electrolysis cell An electrolysis cell comprising a cell housing containing at least one set of gas and electrolyte permeable electrodes, respectively an anode and a cathode separated by an ion permeable diaphragm or membrane, means for introducing an electrolyte to be ele... | 07/20/1982 |
