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| Number | Title | Issue Date |
| 7341618 | Filters and methods of making and using the same Filters for removing particulate and gaseous organic and inorganic materials from a fluid stream are disclosed. The filter may contain a polymer matrix and optional sequestering agents. Methods of making the filters are also disclosed. Methods of using the filters t... | 03/11/2008 |
| 7090738 | Method of manufacturing membrane electrode assembly A membrane electrode assembly having excellent electric power generating capability is produced from a base coated with first polymer electrolytic solution to form an undried first polymer electrolytic membrane. Undried first polymer electrolytic membrane is coated ... | 08/15/2006 |
| 7041191 | Method for manufacturing membrane electrode assembly of fuel cell by printing processes A method for manufacturing membrane electrode assembly of fuel cell includes positioning an ion exchange membrane that is cleaned and trimmed to a predetermined size in advance to a base plate, mounting the base plate to a printing platform, attaching a printing pla... | 05/09/2006 |
| 6939630 | Composite electrode for reducing oxygen A composite electrode for reducing oxygen that provides the quasi four-electron reduction at selectivity of nearly 100% is provided. The composite electrode includes an electrochemical catalyst A that produces hydrogen peroxide by reducing oxygen and a catalyst B th... | 09/06/2005 |
| 5589053 | Electrolysis process for removal of caustic in hemicellulose caustic Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell. By electrolysis,... | 12/31/1996 |
| 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 |
| 5192401 | Diaphragm for use in chlor-alkali cells A liquid permeable diaphragm for use in an electrolytic chlor-alkali cell, the diaphragm being made of fibrous material and having particulate zirconia deposited in the interstices of the fibrous matrix, prior to installing the diaphragm in the cell. Also... | 03/09/1993 |
| 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 |
| 4940518 | Combination seal member and membrane holder for a filter press type electrolytic cell A combination electrolysis cell gasket member and membrane holding member suitable for use in an electrolytic cells of the filter press type including a solid structure in a picture frame type configuration having an inside and outside perimeter surface, ... | 07/10/1990 |
| 4909912 | Ion exchange membrane cell and electrolytic process using thereof An ion exchange membrane cell comprises an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning by an ion exchange membrane. A gas and liquid permeable porous non-electrode layer is bonded at least one of surface of said... | 03/20/1990 |
| 4832805 | Multi-layer structure for electrode membrane-assembly and electrolysis process using same A unitary membrane-electrode assembly includes a structure with multiple layers having different overvoltages for the desired electrochemical reaction. The layer attached to the membrane has a higher overvoltage for the electrochemical reaction than the e... | 05/23/1989 |
| 4729819 | Method for restoring the current efficiency In the electrolysis of sodium chloride by means of a perfluoro cation exchange membrane for the production of sodium hydroxide having a concentration of from 32 to 40% by weight, a method for restoring the current efficiency, which comprises suspending th... | 03/08/1988 |
| 4720334 | Diaphragm for electrolytic cell A liquid permeable diaphragm formed of a major amount polyfluorocarbon fibrils and a minor amount perfluorinated ion exchange material is disclosed. Optionally, the diaphragm may also include inorganic materials such as zirconium oxide, titanium dioxide, ... | 01/19/1988 |
| 4687558 | 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 ... | 08/18/1987 |
| 4675094 | Oxygen-cathode for use in electrolysis of alkali chloride and process for preparing the same Disclosed herein are an oxygen-cathode for use in electrolysis of an alkali chloride, comprising a current collector made of a compact carbonaceous material, an electrode substrate made of a porous carbonaceous material and the catalyst carried on the ele... | 06/23/1987 |
| 4666574 | Ion exchange membrane cell and electrolytic process using thereof An ion exchange membrane cell comprises an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning by an ion exchange membrane. A gas and liquid permeable porous non-electrode layer is bonded at least one of surface of said... | 05/19/1987 |
| 4661218 | Ion exchange membrane cell and electrolysis with use thereof An ion exchange membrane cell which comprises an anode, a cathode, and an anode compartment and a cathode compartment partitioned by an ion exchange membrane. The ion exchange membrane is a cation exchange membrane having a gas and liquid permeable porous... | 04/28/1987 |
| 4655887 | Process for electrolyzing aqueous solution of alkali metal chloride An aqueous solution of an alkali metal chloride is electrolyzed by feeding said aqueous solution of an alkali metal chloride into an anode compartment and feeding an oxygen-containing gas in a cathode compartment in an ion exchange membrane cell comprisin... | 04/07/1987 |
| 4655886 | Ion exchange membrane cell and electrolysis with use thereof An ion exchange membrane cell comprising an anode, cathode, and an anode compartment and a cathode compartment partitioned by an ion exchange membrane. The ion exchange membrane is a cation exchange membrane having a gas and liquid permeable porous non-el... | 04/07/1987 |
| 4652356 | Ion exchange membrane and electrolytic cell using thereof A cation exchange membrane comprising a gas and liquid permeable porous non-electrode layer on at least one surface of said membrane and an electrolytic cell using thereof, wherein said porous layer is formed by many conductive or non-conductive particles... | 03/24/1987 |
| 4648949 | Process for electrolysis of silica-containing brine In an improved process for the electrolysis of silica-containing brine in a membrane cell, the thickness of the membrane, the concentration of silica, aluminum and calcium in the brine and the current density through the membrane in the operating cell are... | 03/10/1987 |
| 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 |
| 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 |
| 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 |
| 4477321 | Sacrificial reinforcements in cation exchange membrane A fluorocarbon cation exchange membrane containing a sacrificial reinforcement for tear resistance which, in use as a cation exchange membrane for alkali metal chloride electrolysis, degrades to provide low voltage operation of the electrolytic cell.... | 10/16/1984 |
| 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 |
| 4445986 | Electrochemical cell having a separator-gas electrode combination The invention is an electrochemical cell containing a separator-gas electrode combination comprising a separator having a first and a second face adapted to permit the flow of fluids or ions therethrough; a gas electrode adapted to permit a liquid and a g... | 05/01/1984 |
| 4444632 | 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... | 04/24/1984 |
| 4411749 | Process for electrolyzing aqueous solution of alkali metal chloride A process for electrolyzing an aqueous solution of an alkali metal chloride by feeding said aqueous solution of an alkali metal chloride into the central space of a hollow quadrilateral frame holding an anode therein, defining an anode compartment, and fe... | 10/25/1983 |
| 4410404 | Membrane cell at increased caustic concentration An improved process for producing high purity caustic in a chlor/alkali cell utilizing a sulfonamide membrane allowing for improved current efficiency with approximately constant voltage by increasing the caustic concentration of the catholyte substantial... | 10/18/1983 |
| 4367126 | Process for producing alkali metal hydroxide An alkali metal hydroxide is produced by electrolyzing an aqueous solution of an alkali metal chloride fed into an anode compartment in a cell having an anode compartment and a cathode compartment formed by partitioning with a cation exchange membrane. A ... | 01/04/1983 |
| 4341605 | Process for cation permeable membrane with reinforcement fabric embedded therein and product thereof A cation permeable membrane containing areas of thin wall construction comprises a cation exchange polymer matrix having a reinforcement fabric embedded therein. A two-step lamination procedure is described where holes are formed in a film of laminated po... | 07/27/1982 |
| 4313805 | Chlorine cell catholyte series flow Improvements in electrolytic chlor-alkali membrane cells, operated with cell-to-cell catholyte series flow, are obtained by the use, as membranes, of fluoropolymers containing pendant functional groups on the cathode side which are less hydrophilic than s... | 02/02/1982 |
| 4293394 | Electrolytically producing chlorine using a solid polymer electrolyte-cathode unit Disclosed is a solid polymer electrolyte electrolytic cell where the cathodic reaction takes place at a three phase catholyte-cathode catalyst-permionic membrane interface. The structure to carry this out may have electroconductive but electrolytically in... | 10/06/1981 |
| 4288310 | Membrane support assembly for electrolytic cell and method of making same Method of supporting a preformed membrane in an electrolytic cell, and apparatus therefor, which comprises casting in situ support plates about the open edges of the membrane.... | 09/08/1981 |
| 4276130 | Process for the production of high purity aqueous alkali hydroxide solution High purity aqueous alkali hydroxide solutions containing predetermined, low concentrations of alkali metal halide are obtained in the anode compartment of an electrolytic cell using a cationic ion exchange membrane by conducting the electrolysis under co... | 06/30/1981 |
| 4268365 | Method of electrolysis of an alkali metal chloride Electrolysis of an alkali metal chloride solution using an ion exchange membrane is carried out by bringing the anode and the cathode into contact with the surfaces of the ion exchange membrane, whereby electrolysis is conducted at a lower voltage and alk... | 05/19/1981 |
| 4169024 | Process for electrolytically producing chlorine in a cell having a diaphragm comprising hydrophilic fluoropolymers Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkal... | 09/25/1979 |
| 4165271 | Diaphragms for use in the electrolysis of alkali metal chlorides A diaphragm for use in the electrolysis of alkali metal chloride brines in electrolytic diaphragm cells is comprised of a support fabric impregnated with a non-fibrilic active component containing silica. The support fabric has a non-continuous coating of... | 08/21/1979 |
| 4153520 | Method for the electrolytic production of chlorine from brine Certain fluoropolymers, when chemically modified by reacting them with sulfur or phosphorus containing compounds, become hydrophilic materials useful for making ion-exchange membranes, especially diaphragms for electrolytic cells, particularly chlor-alkal... | 05/08/1979 |
