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| Number | Title | Issue Date |
| 7335284 | Modular electrochemical cell A modular electrochemical cell having two interchangeable assemblies each with a support structure defining a cylindrical recess and having a fitting for connecting a pipe to the assembly. A disc-shaped electrode is arranged inside each recess and the assemblies are... | 02/26/2008 |
| 7235169 | Method and apparatus for purging and disinfecting water An alkaline electrolyte solution is electrolyzed by a diaphragm-less electrolyzer to provide electrolytic water as purging and disinfecting water. The alkaline electrolyte solution is a mixture of at least one alkaline electrolyte selected from caustic sodium carbon... | 06/26/2007 |
| 7125480 | Methods for affecting the ultra-fast photodissociation of water molecules A method for the ultra-fast photodissociation of water molecules into H2 and O2 gases is presented. Water vapor is initially produced and supplied to a photolysis bottle. Within the photolysis bottle, the water vapor is illuminated by a light s... | 10/24/2006 |
| 7074316 | Functional water, method and apparatus of producing the same, and method and apparatus of rinsing electronic parts therewith A functional water containing a fluorine-containing component obtained by electrolyzing an aqueous solution containing fluoride ion using electrodes having conductive diamonds, a method of producing the same, and a method and an apparatus of rinsing electronic parts... | 07/11/2006 |
| 7045044 | Dispersion composition containing perfluorocarbon-based copolymer A dispersion composition comprising 100 parts by weight of a specific perfluorocarbon-based copolymer containing functional groups and 10 to 10,000 parts by weight of a specific liquid fluoro-oligomer(s). The composition of the present invention is useful as a mater... | 05/16/2006 |
| 6916853 | Compositions containing particles of highly fluorinated ion exchange polymer Solid and liquid compositions containing particles of highly fluorinated ion-exchange polymer having sulfonate functional groups with an ion exchange ratio of less than about 33. The compositions contain at least about 25% by weight of polymer particles having a par... | 07/12/2005 |
| 6235186 | Apparatus for producing electrolytic water An apparatus for producing electrolytic water in which the yielded electrolytic water does not suffer quality deterioration caused by chemical species, e.g., hydrogen ions, moving to the counter-electrode chamber. A diaphragm 4 of a two-chamber type elect... | 05/22/2001 |
| 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 |
| 5716504 | Cation exchange membrane for electrolysis and process for producing potassium hydroxide of high purity A cation exchange membrane for electrolysis, which comprises at least 2 layers of fluorine-containing polymer films having sulfonic acid groups, wherein a first layer facing a cathode is made of a three component polymer of the following monomers (A), (B)... | 02/10/1998 |
| 5628874 | Reduction of chloride in pulping chemical recovery systems The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali ... | 05/13/1997 |
| 5512143 | Electrolysis method using polymer additive for membrane cell operation where the polymer additive is ionomeric and added to the catholyte The operation of electrolytic cells employing ion exchange membranes is improved by addition to the catholyte of a fluorinated ionomer resin resulting in a long-term reduction in the operating voltage of the electrolytic cell.... | 04/30/1996 |
| 5106466 | Process for the integral recovery of the sulphur contained in spent lead batteries, obtained in the form of pure sulphuric acid for reuse in the production of new batteries A process is disclosed for recovering the components of spent lead acid batteries of the type comprising an active mass desulphurization stage in which sodium sulphate is formed, characterized in that the sodium sulphate solution thus formed is fed to an ... | 04/21/1992 |
| 5066682 | Process for preparing an ion exchange membrane A novel process is disclosed in which a membrane of a fluorinated resin containing a pendant precursor ion exchange group represented by the formula: --SO2 X wherein X rerpesents a halogen atom, is contacted with a aqueous solution containing s... | 11/19/1991 |
| 5039382 | Method for producing an alkali metal hydroxide A method for producing an alkali metal hydroxide by electrolysis in an electrolytic cell comprising an anode compartment and a cathode compartment, which comprises supplying an aqueous alkali metal chloride solution to the anode compartment and withdrawin... | 08/13/1991 |
| 4996098 | Coated cation exchange fabric and process A coated cation exchanged fabric having as its base a fluorinated cation exchange resin, oriented at least 1x, in alkali metal salt form and as its coating an unoriented or oriented melt-fabricable precursor of the same salt-form fluorinated cation exchan... | 02/26/1991 |
| 4990228 | Cation exchange membrane and use A fluorinated cation exchange membrane made using reinforcement of oriented, hydrolyzed fabric of a cation exchange copolymer, the fabric having a coating of a melt-processible precursor or derivative of a fluorinated cation exchange resin on at least one... | 02/05/1991 |
| 4964960 | Cation exchange reinforced membrane and process for using A fluorinated cation exchange membrane comprising one or more layers of an ion-conductive film and where one or more layers has adhered therein a fabric reinforcement made from fully ion conductive yarn that is oriented and then at least partially hydroly... | 10/23/1990 |
| 4900408 | Membrane electrolytic process for producing concentrated caustic Process for the manufacture of sodium hydroxide in a sustained manner, tolerant of upsets in sodium hydroxide concentration, by electrolysis of sodium chloride at about 70°-110° C. in an electrolysis cell separated into a cathode compartment and an anod... | 02/13/1990 |
| 4894128 | Membrane unit for electrolytic cell A membrane unit for use in an electrolytic cell comprising a combination of a membrane material and a reinforcing material around only the gasket-bearing surface of the membrane material. Damage to the gasket bearing surface of the membrane structure is m... | 01/16/1990 |
| 4872958 | Ion exchange membrane for electrolysis An ion exchange membrane for electrolysis comprising a first layer of a fluoropolymer having carboxylic acid groups as its ion exchange groups and facing a cathode, a second layer of a fluoropolymer having ion exchange groups, a specific resistance lower ... | 10/10/1989 |
| 4770757 | Edge reinforcement of membranes for chlor-alkali cells A presoaked perhalogenated polymer cation exchange membrane containing at least one type of acid groups, carboxyl or sulfonyl, is bonded to other articles such as edge-reinforcing tape, gasket, electrolytic cell frame, etc., by means of a pressure-sensiti... | 09/13/1988 |
| 4722772 | Process for electrolysis of sulfate-containing brine In an improved process for the electrolysis of sulfate-containing brine in a membrane cell, the thickness of the membrane, the concentration of sodium sulfate in the brine and the current density through the membrane in the operating cell are controlled t... | 02/02/1988 |
| 4693796 | Method for manufacturing cation exchange membrane A cation exchange membrane manufacturing method in which a film of a blend which consists of a perfluoro carbon polymer having a group transformable into a sulfonic acid group and a perfluoro carbon polymer having a group transformable into a carboxylic a... | 09/15/1987 |
| 4610764 | Electrolytic cation exchange membrane An electrolytic cation exchange membrane which comprises a first film made of a fluorinated polymer having cation exchange groups and containing a fibrillated tetrafluoroethylene polymer and a second film laminated thereon, made of a fluorinated polymer h... | 09/09/1986 |
| 4604170 | Multi-layered diaphragm for electrolysis A multi-layered diaphragm for electrolysis, which comprises a porous layer of a fluorine-containing polymer having a pore diameter of from 0.05 to 10 μm, a porosity of from 30 to 95% and a thickness of from 30 to 450 μm and with its interior and anode-s... | 08/05/1986 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 4465568 | Electrochemical production of KNO3 /NaNO3 salt mixture A process for the electrolytic production of a chloride-free mixture consisting essentially of sodium and potassium nitrates is disclosed. In this process, an anolyte brine comprised of a mixture of sodium and potassium chlorides dissolved therein is elec... | 08/14/1984 |
| 4462877 | Composite ion exchange membranes A composite, substantially completely fluorinated film containing ion exchange groups and its use as an ion exchange membrane in an electrolytic cell is described. The membranes are comprised of at least two layers wherein the layers have equivalent weigh... | 07/31/1984 |
| 4450056 | Raney alloy coated cathode for chlor-alkali cells An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta (NiAl3) crystalline precursory outer portion of the metal core is disclosed. Further, the precursory outer portion p... | 05/22/1984 |
| 4437951 | Membrane, electrochemical cell, and electrolysis process An ion exchange membrane which comprises a layer of fluorinated polymer which has carboxylic functional groups, a second layer of fluorinated polymer which has sulfonic or carboxylic functional groups at a surface layer, and a web of support material ther... | 03/20/1984 |
| 4437952 | Coextruded multilayer cation exchange membranes Multilayer fluorinated cation exchange membranes prepared by coextrusion of precursor polymers.... | 03/20/1984 |
| 4411750 | Cation exchange membrane with 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.... | 10/25/1983 |
| 4402806 | Multi layer ion exchanging membrane with protected interior hydroxyl ion rejection layer The performance of a permselective cation transporting membrane is improved by making the membrane a three or more layer structure in which the layer having the best hydroxyl (OH) ion rejection characteristic is in the interior of the membrane. The OH ion... | 09/06/1983 |
| 4399009 | Electrolytic cell and method Chlorine and other halogens can be generated by electrolyzing an aqueous alkali metal halide or hydrogen halide between an anode and cathode in an electrolytic cell having a composite semipermeable membrane separating the said electrodes. This membrane is... | 08/16/1983 |
| 4349422 | Electrolysis process A process and cell for electrolysis of alkali metal halides, especially sodium chloride, are described, wherein the anolyte and catholyte compartments are separated by a fluorinated ion-exchange membrane whose surface facing the catholyte compartment is o... | 09/14/1982 |
| 4331521 | Novel electrolytic cell and method In an electrolytic cell comprising a cell unit with at least one anodic compartment equipped with an anode and at least one cathodic compartment equipped with a cathode, said compartments being separated by a diaphragm comprised of at least two separable ... | 05/25/1982 |
