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| Number | Title | Issue Date |
| 7258778 | Electrocatalytic coating with lower platinum group metals and electrode made therefrom The present invention relates to an electrocatalytic coating and an electrode having the coating thereon, wherein the coating is a mixed metal oxide coating, preferably platinum group metal oxides, with or without low levels of valve metal oxides. The electrocatalyt... | 08/21/2007 |
| 7229536 | Electrode for use in hydrogen generation 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. ... | 06/12/2007 |
| 6395153 | Diaphragm cell The present invention pertains to electrolytic diaphragm cells, particularly for the electrolysis of brine to produce chlorine and caustic. The innovation resides generally in the discovery that electrolytic cell operation can be desirably enhanced by com... | 05/28/2002 |
| 6156185 | Reactivation of deactivated anodes Disclosed is a method of reactivating a deactivated anode that has a coating of a noble metal or noble metal oxide on a substrate. A coating of a noble metal is deposited on the anode electrolessly. The noble metal in the deposited coating can be platinum... | 12/05/2000 |
| 6132591 | Method for removal of sulfate groups and chlorate groups from brine 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 ... | 10/17/2000 |
| 5993620 | Anode for diaphragm electrochemical cell The invention discloses a novel structure for an expandable anode to be used in diaphragm cells. This new structure comprises a conductor bar in the form of a copper core provided with a titanium layer having a first and a second pair of flexible expander... | 11/30/1999 |
| 5948222 | Reactivation of deactivated anodes Disclosed is a method of reactivating a deactivated anode that has a coating of a noble metal or noble metal oxide on a substrate. A coating of a noble metal is deposited on the anode either electrolessly or electrolytically. The noble metal in the deposi... | 09/07/1999 |
| 5650058 | Electrolytic cell and capillary gap electrode for gas-developing or gas-consuming electrolytic reactions and electrolysis process therefor The invention includes an electrolytic cell for gas-developing or gas-consuming electrolytic reactions and processes, and an electrolysis process therefor. According to the invention, the capillary slit electrode has conduits enabling the separate flow of... | 07/22/1997 |
| 5593553 | Electrolytic cell and electrode therefor An electrode comprising a first plate (4) having an active electrode surface and a second plate (14) facing and spaced from the first plate, and at least one barrier plate (13) positioned between the first and second plates and spaced from the active elec... | 01/14/1997 |
| 5565082 | Brine electrolysis and electrolytic cell therefor A method for brine electrolysis using a gas electrode and an electrolytic cell therefor, in which gas electrode 31 permeable to gas and liquid is arranged in cathode chamber 24 in contact with ion-exchange membrane 22. Sodium hydroxide produced on electro... | 10/15/1996 |
| 5366598 | Method of using a metal substrate of improved surface morphology A metal surface is now described having enhanced adhesion of subsequently applied coatings. The substrate metal of the article, such as a valve metal as represented by titanium, is provided with a highly desirable surface characteristic for subsequent coa... | 11/22/1994 |
| 5230780 | Electrolyzing halogen-containing solution in a membrane cell A coating is now disclosed which is especially serviceable as an improved electrocatalytic coating for an electrode. The coating is a crystalline coating of mixed oxides. The oxides are of iridium, ruthenium and titanium, in very specially defined proport... | 07/27/1993 |
| 5227030 | Electrocatalytic cathodes and methods of preparation Cathodes useful in an electrolytic cell, such as a chlor-alkali cell, are disclosed which have a metallic-surfaced substrate coated with a catalytic coating composition. In one aspect, the catalytic coating includes a base layer of at least one primary el... | 07/13/1993 |
| 5133842 | Electrochemical cell having electrode comprising gold containing electrocatalyst The disclosed electrocatalyst material is useful in electrodes, especially in cathodes for the reduction of oxygen or peroxide to water or hydroxide. The electrocatalyst typically comprises 0.1 to 20 weight-%, based on the weight of the material, of a sup... | 07/28/1992 |
| 5035779 | Process for producing cathode and process for electrolysis using said cathode A cathode for electrolysis, particularly of a sodium chloride aqueous solution by an ion-exchange membrane method, and a process for producing the same, the cathode comprising a conductive base having a nickel surface and having provided thereon (a) at le... | 07/30/1991 |
| 4975161 | Electrodes for use in electrochemical processes and method for preparing the same The present invention concerns electrodes for use in electrochemical processes, particularly as cathodes for hydrogen evolution in cells for the electrolysis of alkali metal halides, the electrodes comprising an electrocatalytic ceramic coating obtained b... | 12/04/1990 |
| 4938851 | Method for preparing an electrode and use thereof in electrochemical processes The present invention concerns a method for preparing electrodes for use in electrochemical processes, said electrodes being constituted by a conductive support whereto an electrocatalytic coating is applied by galvanic deposition from a galvanic plating ... | 07/03/1990 |
| 4801368 | Ni/Sn cathode having reduced hydrogen overvoltage Disclosed is a cathode comprising an active layer composed of a nickel/tin alloy having a nickel content of 25 to 99% by weight, which is formed on the surface of an electrically conductive electrode substrate. When this cathode is used for generating hyd... | 01/31/1989 |
| 4724052 | Method for preparing an electrode and use thereof in electrochemical processes The present invention concerns a method for preparing electrodes for use in electrochemical processes, said electrodes being constituted by a conductive support whereto an electrocatalytic coating is applied by galvanic deposition from a galvanic plating ... | 02/09/1988 |
| 4668370 | Electrode for electrochemical processes and use thereof in electrolysis cells The present invention provides an electrode having a coating made of electrocatalytic ceramic materials on substantially incompatible metal substrates, by resorting to the use of an anchoring pre-coating or interlayer, applied over the metal substrate adv... | 05/26/1987 |
| 4618404 | Electrode for electrochemical processes, method for preparing the same and use thereof in electrolysis cells The present invention provides an electrode having a coating made of electrocatalytic ceramic materials on substantially incompatible metal substrates, by resorting to the use of an anchoring pre-coating or interlayer, applied over the metal substrate adv... | 10/21/1986 |
| 4588483 | High current density cell A filter press membrane electrolytic cell having at least one cathode and one anode sandwiched about a permselective ion exchange membrane which employs a cathode having a first layer and a second layer cooperative with the membrane such that the voltage ... | 05/13/1986 |
| 4574037 | Vertical type electrolytic cell and electrolytic process using the same Disclosed is a vertical type electrolytic cell partitioned by an ion exchange membrane into an anode compartment and a cathode compartment, the cathode compartment being divided by a non-perforated cathode plate into a cathode gas generation room and a ca... | 03/04/1986 |
| 4572770 | Preparation and use of electrodes in the electrolysis of alkali halides A substrate is coated with a solution of metal oxide precursor compounds and an etchant for etching the substrate, the metal oxide precursor compounds are thermally concentrated by removing volatiles therefrom, and the so-concentrated metal oxides precurs... | 02/25/1986 |
| 4512857 | Prevention of corrosion of electrolyte cell components Disclosed is a method of operating an electrolytic cell having an active, catalytic cathode and an iron structure in contact with an alkaline electrolyte. The dissolution of iron into the electrolyte is reduced by a sacrificial anode in proximity to, and ... | 04/23/1985 |
| 4507183 | Ruthenium coated electrodes An electrode produced by electroplating ruthenium metal on a substrate from a nonacidic ruthenium-containing electroplating solution.... | 03/26/1985 |
| 4470890 | Method for preventing cathode corrosion A method is provided for preventing the dissolution of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a corrosion inhibitor, such as sodium silicate or trisodium phosphate, to the electrolytic solution dur... | 09/11/1984 |
| 4436599 | Method for making a cathode, and method for lowering hydrogen overvoltage in a chloralkali cell The invention provides an improved process for making an iron-activated cathode for a chloralkali cell, and an improved method for lowering the operating voltage of a chloralkali electrolysis cell, which comprises adding to the cathode compartment of the ... | 03/13/1984 |
| 4430177 | Electrolytic process using oxygen-depolarized cathodes A porous, two layer electrode which may be used as an anode or a cathode and a cell using one or more of the electrodes. The electrode is in a pocket shaped configuration with the inner layer having interstitial passageways which are larger in diameter th... | 02/07/1984 |
| 4392927 | Novel electrode A composite electrode comprising an electroconductive base with an electrolyte inert, electroconductive electrocatalytic layer applied by thermal spraying, the said layer being a powder of a matrix material selected from the group consisting of oxides, ni... | 07/12/1983 |
| 4358353 | Method for extending cathode life A method is provided for extending the life of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a reducing agent, such as Na2 SO3 or urea, to the electrolytic solution during periods of... | 11/09/1982 |
| 4356068 | Permionic membrane Disclosed is an electrolytic cell having an anode and cathode separated by and in contact with a permionic membrane. The cathodic surface of the permionic membrane is characterized by microporous channels of permionic membrane material extending from the ... | 10/26/1982 |
| 4350608 | Oxygen cathode for alkali-halide electrolysis and method of making same An air/oxygen electrode substrate for use as a cathode in alkali metal halide electrolysis processes is formed by compressing a prefused mixture of carbon black and a hydrophobic polymer such as polytetrafluoroethylene under high pressures and at a temper... | 09/21/1982 |
| 4342629 | Solid polymer electrolyte chlor-alkali process Disclosed is a solid polymer electrolyte electrolytic cell, e.g., for chlorine production, where the electrodes are in compressive contact with and removable from the permionic membrane.... | 08/03/1982 |
| 4318795 | Valve metal electrode with valve metal oxide semi-conductor face and methods of carrying out electrolysis reactions Describes chlorine resistant metal electrodes, preferably of valve metals such as titanium and tantalum, having coatings of mixed metal oxides, preferably valve metal oxides and platinum group metal oxides, which have been doped to provide semi-conducting... | 03/09/1982 |
| 4312723 | Corrosion resistant electrolytic cell An electrolytic cell and its method of operation is described. The cell comprises an anode, a cathode and iron-containing metals exposed to the interior portions of the cell which are maintained at about the same electrical potential as the cathode. These... | 01/26/1982 |
| 4279709 | Preparation of porous electrodes Electrodes with porous coatings are produced using an inorganic compound which is soluble in an aqueous solution, as the pore former in the coating. The inorganic pore former may be removed from the coating while the electrode is being used in an electrol... | 07/21/1981 |
| 4269675 | Electrolyte series flow in electrolytic chlor-alkali cells In an electrolytic chlor-alkali cell, or bank of cells, having a plurality of electrolyte compartments containing electrode pairs (anodes and cathodes) and wherein a hydraulically-impermeable membrane separates the electrolyte compartments into catholyte ... | 05/26/1981 |
| 4250004 | Process for the preparation of low overvoltage electrodes An improved process is described for the electrodeposition of both a low overvoltage metal and a sacrificial metal onto an electrically conductive substrate. The sacrificial metal is later removed by leaching the electrodeposited substrate with alkali met... | 02/10/1981 |
| 4248680 | Electrolytic process and apparatus Disclosed is an electrolytic cell having an anode, a cathode, and a synthetic fluoro-carbon-resin permionic membrane between the anode and cathode. The improvement is characterized by the fluorocarbon-resin permionic membrane being a fluorinated copolymer... | 02/03/1981 |
