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| Number | Title | Issue Date |
| 4586992 | Process for producing potassium hydroxide A process for producing potassium hydroxide by electrolysis of potassium chloride in an electrolytic cell comprising an anode compartment and a cathode compartment partitioned by a cation exchange membrane, which process comprises supplying potassium chlo... | 05/06/1986 |
| 4568441 | Solid polymer electrolyte membranes carrying gas-release particulates A solid polymer electrolyte (SPE), solid polymer electrolyte electrode, and method for forming from cationic exchange perfluorocarbon copolymer. Disclosed are solution techniques for forming SPE's and SPE electrodes using fluorocarbon vinyl ether copolyme... | 02/04/1986 |
| 4563260 | Modified liquid permeable asbestos diaphragms with improved dimensional stability A blend of fluorocarbon polymers for incorporation into an asbestos fiber slurry for forming into a diaphragm is disclosed. The blend comprises fluorocarbon polymer fibers and fluorocarbon polymer chunks of certain sizes in certain weight ratios. Also dis... | 01/07/1986 |
| 4561946 | Electrolytic cell for the electrolysis of an alkali metal chloride and process of using said cell An electrolytic cell for the electrolysis of an alkali metal chloride, wherein an ion-exchange membrane provided at least on one side thereof with a gas and liquid permeable non-electrocatalytic porous layer, is disposed between an anode and a cathode so ... | 12/31/1985 |
| 4560461 | Electrolytic cell for use in electrolysis of aqueous alkali metal chloride solutions In electrolytic cell for use in electrolysis of aqueous alkali metal chloride solutions, which comprises one or more vertical expandable anodes, one or more vertical cathodes and one or more cation-exchange membranes each located between a pair of the opp... | 12/24/1985 |
| 4557816 | Electrolytic cell with ion exchange membrane A chlor-alkali electrolytic cell with a cation exchange membrane is improved, with respect to eliminating local differences of electrolyte, by providing a duct to facilitate downward flow of electrolyte. The duct of this invention serves, without increase... | 12/10/1985 |
| 4557955 | Shaped articles which are composed of a copolymer containing fluorine groups and which are selectively permeable to liquids and gases and are simultaneously oleophobic and oleophilic The invention relates to films and tubular structures which are selectively permeable to liquids and gases which are based on a copolymer composed of a copolymerized fluorinated olefin, copolymerized vinyl acetate and, optionally, a copolymerized olefin. ... | 12/10/1985 |
| 4555323 | Chlorination device A system to generate chlorine to disinfect a body of water. The system has a pump to move water through the system, a filter and an electrolytic cell able to generate chlorine by the electrolysis of sodium chloride and having an anode and a cathode mounte... | 11/26/1985 |
| 4552631 | Reinforced membrane, electrochemical cell and electrolysis process A reinforced ion exchange membrane which comprises fluorinated polymer which has carboxylic functional groups, which has a hydrogen bubble release layer on the cathode-facing side thereof, and which has channels open to the outer surface of the anode-faci... | 11/12/1985 |
| 4547411 | Process for preparing ion-exchange membranes A process for preparing membranes for electrolysis. One such process comprises impregnating a porous sheet comprising a polyfluoroolefin, asbestos fibers and an inorganic pore-forming agent with a solution comprising (i) a compound selected from the group... | 10/15/1985 |
| 4545886 | Narrow gap electrolysis cells A narrow gap electrolysis cell has anode and cathode compartments divided by an ionically-permeable separator, such as an ion-exchange membrane or a fibrous diaphragm, and a current feeder grid in electrical contact with a surface-activated particulate el... | 10/08/1985 |
| 4544471 | Electrolytic cell with cation exchange membrane having high equivalent weight component Composite fluorocarbon cation exchange membrane having at least two layers of fluorinated polymer containing pendant side chains with sulfonyl groups wherein the equivalent weight of one such layer differs from the adjacent layer by at least 100.... | 10/01/1985 |
| 4544474 | Porous diaphragms for electrolytic cells having non-uniform hydrophobicity A porous diaphragm for an electrolytic cell for the electrolysis of alkali metal halides is comprised of a thermoplastic support fabric impregnated with particles of a siliceous composition. The thermoplastic support fabric has an anode side, a cathode si... | 10/01/1985 |
| 4544458 | Fluorinated ion exchange polymer containing carboxylic groups, process for making same, and film and membrane thereof Fluorinated ion exchange polymers which have pendant side chains which contain --OCF2 COOR groups, or which have both pendant side chains containing carboxylic groups and pendant side chains which contain sulfonyl groups, when used in the form ... | 10/01/1985 |
| 4539082 | Woven diaphragm for aqueous electrolytes A woven diaphragm for a diaphragm electrolysis cell for electrolysis of aqueous solutions containing ions such as alkali metal ions, chloride ions, and sulfate ions which diaphragm comprises warp threads and weft threads. Both warp threads and weft thread... | 09/03/1985 |
| 4539085 | Porous diaphragm for electrolytic cell A porous diaphragm for an electrolytic cell enables, e.g., the electrolysis of NaCl to NaOH, in high concentration and in good yield, said diaphragm comprising an electrolytically acceptable porous sheet member having a total pore volume and average equiv... | 09/03/1985 |
| 4539084 | Unreinforced membrane, electrochemical cell and electrolysis process An unreinforced ion exchange membrane which comprises fluorinated polymer which has carboxylic functional groups, which has a hydrogen bubble release layer on the cathode-facing side thereof, and which has channels open to the outer surface of the anode-f... | 09/03/1985 |
| 4537668 | Process for the production of a cation exchange diaphragm and the diaphragm obtained by this process Cation exchanger diaphragm which can in particular be used as a solid electrolyte. This diaphragm comprises a grafted copolymer film, particularly polyethylene grafted by styrene and has an exchange capacity exceeding 0.5 meq/g, a resistivity below 100Ω.... | 08/27/1985 |
| 4537672 | Electrolytic cell An electrolytic cell comprising a plurality of anodes and a plurality of cathodes, and a hydraulically impermeable cation-exchange membrane and a gasket of an electrically insulating material positioned between each adjacent anode and cathode to form in t... | 08/27/1985 |
| 4537673 | Electrolytic cell An electrolytic cell comprises intercalated finger-shaped electrodes each disposed through a cation exchange membrane, in which said cation exchange membrane constitutes a cylinder or envelope enclosing a finger-shaped anode or cathode A flare is formed a... | 08/27/1985 |
| 4533453 | Ion exchange membrane electrolytic cell An ion exchange membrane electrolytic cell comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane. A gas and liquid permeable porous non-electrode layer composed of non-oxide ceramics particle... | 08/06/1985 |
| 4530743 | 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... | 07/23/1985 |
| 4530749 | Bonded asbestos diaphragms The hydrophilicity and other properties of fluoropolymer-bonded asbestos diaphragms for use in brine electrolysis cells are improved by incorporating Na2 CO3 into the aqueous slurry from which the diaphragms are prepared.... | 07/23/1985 |
| 4528077 | Membrane electrolytic cell for minimizing hypochlorite and chlorate formation An electrolytic cell for the electrolysis of an alkali metal chloride brine is comprised of an anode compartment and a cathode compartment separated by a cation exchange membrane. The anode is comprised of an unflattened expanded structure of a valve meta... | 07/09/1985 |
| 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 |
| 4523984 | Treatment of ion-exchange membrane Treating a sheet of ion-exchange membrane in order to decrease the voltage of operation of an electrolytic cell containing the membrane by swelling the membrane in a liquid medium, the extent of swelling on the anode side being greater than the extent of ... | 06/18/1985 |
| 4523981 | Means and method for reducing carbon dioxide to provide a product A process for reducing carbon dioxide to at least one useful product includes two redox couple electrolyte solutions separated by a first membrane having photosensitizers. The carbon dioxide to be reduced is separated from one of the redox couple electrol... | 06/18/1985 |
| 4518470 | Ion exchange membrane cell and electrolytic process using thereof An electrolytic cell comprises an anode and a cathode which are partitioned by an ion exchange membrane having at least one roughened surface which contacts with or closes in a distance of up to 20 mm to a corresponding electrode.... | 05/21/1985 |
| 4511518 | Perfluorinated fluorosulfonylalkyleneoxy-2-propanoyl fluoride and hexafluoroepoxide addition compounds A novel fluorinated copolymer is prepared by copolymerization of a fluorinated olefin with a novel sulfur containing fluorinated vinylether of the formula: ##STR1## wherein k is 0 or 1 and l is an integer of 3 to 5, which is prepared from starti... | 04/16/1985 |
| 4508603 | Fluorinated cation exchange membrane and use thereof in electrolysis of an alkali metal halide A fluorinated cation exchange membrane is formed using a copolymer of a fluorovinyl ether (I) having the formula wherein l is 0 to 3; m is 2 to 6; n is 0 to 4 and one of l and n is not zero and l+m+nࣙ3; X, X' and X" are the same or different and each re... | 04/02/1985 |
| 4505797 | Ion-exchange membranes reinforced with non-woven carbon fibers This invention is directed to electrodialysis, electrochemical membrane cells and particularly to components comprising the ion-exchange membranes. These membranes are fabricated containing a reinforcing structure comprised of non-woven carbon fibers deri... | 03/19/1985 |
| 4502931 | Process for the production of ion exchange membranes with coating for electrolysis A process for the production of electrolytic ion exchange membranes with a coating, comprising coarsening the surface of an ion exchange membrane by an ion-etching treatment and, thereafter, coating the coarsened surface with a substance with a low electr... | 03/05/1985 |
| 4498961 | Method of electrolyzing brine with stable low voltage microporous diaphragm in electrolytic cells A porous polyfluoroalkylene sheet, preferably of polytetrafluoroethylene, which is suitable for use as a stable low voltage separator or diaphragm in an electrolytic cell, such as one employed for the electrolysis of brine, without being subject to an obj... | 02/12/1985 |
| 4496451 | Ion exchange membrane manufacture for electrolytic cell An ion exchange membrane electrolytic cell comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane; an improvement characterized in that a gas and liquid permeable porous non-electrode layer is... | 01/29/1985 |
| 4490484 | Membrane assembly, electrochemical cell, and electrolysis process using perfluorinated sandwich type membrane A membrane assembly which comprises a layer of perfluorinated polymer which has carboxylate functional groups, a layer of perfluorinated polymer which has ion exchange functional groups, and a water-containing or water-soluble stratum which lies between t... | 12/25/1984 |
| 4489025 | Preparation of dimensionally stable asbestos diaphragms A dimensionally stable asbestos diaphragm is formed by direct coating on the foraminous cathode of an electrolytic cell from an asbestos fiber-particulate polymer slurry, followed by fusion of the thermoplastic polymer.... | 12/18/1984 |
| 4487668 | Fluorinated ion exchange polymer containing carboxylic groups, and film and membrane thereof Fluorinated ion exchange polymers which have pendant side chains which contain ##STR1## groups wherein W is F or CF3, and R is an ionizable group, or which have such pendant side chains and also pendant side chains which contain sulfo... | 12/11/1984 |
| 4486277 | Electrolytic cation exchange membrane An electrolytic cation exchange membrane comprises a first film made of a fluorinated polymer having cation exchange groups and a second film laminated thereon, made of a fluorinated polymer having carboxylic acid groups as its ion exchange groups and con... | 12/04/1984 |
| 4484989 | Electro organic method and apparatus for carrying out same Discloses a solid polymer electrolyte having ring ethers bonded to a polymer matrix, with metal ions chelated by the ring ethers.... | 11/27/1984 |
| 4482441 | Permeable diaphragm, made from a hydrophobic organic polymeric material, for a cell for the electrolysis of aqueous solutions of an alkali metal halide Permeable diaphragm for a cell for the electrolysis of aqueous solutions of an alkali metal halide, the diaphragm being made from a hydrophobic organic polymeric material containing an oxide of a metal chosen from amongst group IIa of the periodic table o... | 11/13/1984 |
