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| Number | Title | Issue Date |
| 8137522 | Method for desalinating saltwater using concentration difference energy A method and apparatus for desalinating saltwater using concentration difference energy is disclosed. In order to desalinate saltwater that is contained within a product chamber, a drive cell is used to generate a drive voltage. The product chamber has a desalinatio... | 03/20/2012 |
| 7662267 | Device and method for electrodialysis An improved apparatus and operating method related thereto for deionizing water to produce substantially pure water using electric field and ion exchange materials are disclosed, including embodiments incorporating one or more of the novel features of brine and elec... | 02/16/2010 |
| 7223327 | Method of preparing free polyelectrolyte membranes A releaseable membrane structure for producing a free membrane containing a substrate, a release stratum on the substrate and a membrane stratum on the release stratum. The release stratum and the membrane stratum contain oppositely-charged polyelectrolytes that are... | 05/29/2007 |
| 7214301 | Filter or filter-element for modified electro-dialysis (MED) purposes Filter or filter-element designated for Modified Electro-Dialysis (MED) purposes characterized in that the filter or filter-element comprises a porous, ceramic, mainly uniform material with functional, preferably ion selective groups grafted onto the inner, porous s... | 05/08/2007 |
| 7192619 | Modified milk protein concentrates and their use in making gels and dairy products The method of the invention produces modified milk protein concentrates using cation exchange to replace divalent ions with monovalent ions. The modified milk protein concentrate produced may be converted into a gel which may be a cheese-like product itself, or used... | 03/20/2007 |
| 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 |
| 7083772 | Aqueous solution of zinc nitrite and method for production thereof An aqueous zinc nitrite solution which contains substantially no calcium (Ca) ions is provided, in which, in terms of the aqueous zinc nitrite [Zn(NO2)2] solution having an NO2 concentration of 10% by weight, the sodium (Na) ion conc... | 08/01/2006 |
| 6929693 | Single crystals, method for making single crystals by growth in solution and uses The invention relates to a tetragonal single crystal (1, 11) of composition: Z(H,D)2MO4 where Z is an element or a group of elements, or a mixture of elements and/or of groups of elements chosen from the group K, N(H,... | 08/16/2005 |
| 6864388 | Process for preparing salts of methallylsulfonic acid A process for preparing salts of methallylsulfonic acid in which the reaction mixture produced from the sulfonation is diluted with water and neutralized with a base. ... | 03/08/2005 |
| 6814865 | Ion exchange membranes, methods and processes for production thereof and uses in specific applications The invention includes novel anion exchange membranes formed by in situ polymerization of at least one monomer, polymer or copolymer on a woven support membrane and their methods of formation. The woven support membrane is preferably a woven PVC membrane. The invent... | 11/09/2004 |
| 6764584 | Process for producing lithium concentrate from brine or seawater Two concentration techniques, adsorption and electrodialysis, are combined to enrich lithium ions in brine from a level of several ppm to about 1.5%. At beginning brine is subjected to an adsorption, so that Li content is increased to 1200-1500 ppm, followed by two ... | 07/20/2004 |
| 6755951 | Electrodialysis of salts for producing acids and bases An electrodialysis cell is operated in the presence of organic compounds that binds or chelates with the multivalent metals to form a metal chelating buffer. Among other things, this binding or chelating reduces power consumption, produces a stable cell operation, a... | 06/29/2004 |
| 6638408 | Method and device for separation of charged molecules by solution isoelectric focusing The invention provides a novel solution isoelectric focusing device and method that can reproducibly fractionate charged molecules into well-defined pools. This approach can be applied to mixtures of charged molecules, such as eukaryotic proteome samples ... | 10/28/2003 |
| 6607647 | Electrodeionization apparatus with expanded conductive mesh electrode and method An electrodeionization apparatus and method of use includes an expanded conductive mesh electrode. The expanded conductive mesh electrode may be formed from any conductive material that is dimensionally stable and may be coated with conductive coating. Th... | 08/19/2003 |
| 6569301 | Cation exchange membrane selectively permeable to monovalent cations and method for its production The present invention provides a cation exchange membrane which has excellent durability, a high limiting current density, a low direct current membrane resistance and excellent selectivity to monovalent cations. In the present invention, a cation exchang... | 05/27/2003 |
| 6554990 | Process for the manufacture of alkali metal hydroxide Process for the manufacture of alkali metal hydroxide, according to which an electrodialysis cell containing three compartments is used, an aqueous alkali metal halide solution is circulated in a saline compartment of the cell, delimited between an anioni... | 04/29/2003 |
| 6537436 | System for electrodialysis treatment of liquids An electrodialysis treatment system utilizing a plurality of disparate layers of an electrodialysis cell stack for separation of components in liquid mixtures. The system for electrodialysis treatment for purification and deionizing liquids includes provi... | 03/25/2003 |
| 6461491 | Method and apparatus for electrodialysis processing An electrodialysis apparatus includes a stack of alternating cation and anion semi-permeable, ion-selective membranes disposed between a positive DC potential anode electrode and a negative DC potential cathode electrode. The cation and anion selective me... | 10/08/2002 |
| 6379517 | Method and device for electrodialytic regeneration of an electroless metal deposition bath A method and a device for the regeneration of an electroless metal deposition bath containing hypophosphite ions by electrodialysis is described. The method according to the invention and the device differ from the prior art in that the bath solution is l... | 04/30/2002 |
| 6294066 | Apparatus and process for electrodialysis of salts An apparatus and the process produces salts by an electrodialysis operation. The basic electrodialysis apparatus is a cell having a number of compartments separated by membranes. A DC source is connected to drive a current through a feed stream passing th... | 09/25/2001 |
| 6241866 | Electrodeionization apparatus with fixed ion exchange materials Electrodeionization apparatus for purifying water that includes a cathode, an anode, and a plurality of alternating anion permeable membranes and cation permeable membranes between the cathode and anode that define concentrating and diluting flow channels... | 06/05/2001 |
| 6221225 | Apparatus and process for electrodialysis of salts An apparatus and process produces salts by an electrodialysis operation. The basic electrodialysis apparatus is a cell having a number of compartments separated by ion exchange membranes. A DC source is connected to drive a current through a feed stream p... | 04/24/2001 |
| 5876579 | Electrodialysis treatment A process for reducing the content of organic and inorganic halogen in an aqueous solution of a nitrogen-containing epihalohydrin-based resin, in which process the aqueous resin solution is subjected to an electrodialysis treatment. The aqueous resin solu... | 03/02/1999 |
| 5851372 | Process for demineralizing a liquid containing organic matter and salts in solution A process of demineralizing a liquid containing organic matter and inorganic salts in solution, in which the treatment of the liquid comprises the following steps: the liquid is percolated over a strong cationic ion exchange resin for monovalent ions; bot... | 12/22/1998 |
| 5833832 | Preparation of onium hydroxides in an electrochemical cell A process is described for preparing onium hydroxides from the respective onium salts and for purifying onium hydroxides in an electrochemical cell. In one example, the present invention relates to a process for preparing onium hydroxides from the corresp... | 11/10/1998 |
| 5772013 | Method and apparatus for producing di- and more highly oxidized carboxylic acids A method is disclosed for producing di- and more highly oxidized carboxylic acids from a compound selected from a first group consisting of carbohydrates, carbohydrate derivatives and carbohydrate derivatives having more than one primary alcohol group, co... | 06/30/1998 |
| 5753097 | Process for purifying hydroxide compounds In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound, including the steps of: (A) providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and a bipolar membrane... | 05/19/1998 |
| 5709790 | Electrochemical process for purifying hydroxide compounds In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound, including the steps of: (A) providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and an anion selective... | 01/20/1998 |
| 5705046 | Process for treating effluent from flue-gas desulfurization system and apparatus therefor A process for treating effluent from a flue-gas desulfurization system wherein the resulting gypsum is removed, comprises filtering the gypsum and fly ash free effluent by a filter, transferring the filtrate to an electrodialyzer wherein cation-exchange m... | 01/06/1998 |
| 5643430 | Electrodialysis treatment A process for reducing the content of organic and inorganic halogen in an aqueous solution of a nitrogen-containing epihalohydrin-based resin, in which process the aqueous resin solution is subjected to an electrodialysis treatment. The aqueous resin solu... | 07/01/1997 |
| 5578181 | Method for treating waste water containing neutral salts comprising monovalent ions In order to reduce releasing of neutral salts comprising monovalent ions contained in industrial waste effluent to the environment, the waste effluent to be treated is supplied into a prepositive electrodialysis cell comprising ion exchange membranes whic... | 11/26/1996 |
| 5575901 | Process for preparing organic and inorganic hydroxides or alkoxides or ammonia or organic amines from the corresponding salts by electrolysis A process is described for preparing organic and inorganic hydroxides or alkoxides, or ammonia or organic amines from the corresponding salts in an electrolysis cell which comprises an anolyte compartment containing an anode and an electrolyte solution, a... | 11/19/1996 |
| 5567293 | Electromembrane processes for the treatment of kraft mill electrostatic precipitator catch A process for the recovery of alkali metal hydroxide and acid from the alkali metal salts of monovalent anions which are mixed with the alkali metal salts of multivalent anions employs a water-splitting system composed of bipolar membranes in conjunction ... | 10/22/1996 |
| 5536385 | Production and purification of contaminated effluent streams containing ammonium sulfate and ammonia The present invention, in certain embodiments, teaches a process for treating ammonia or ammonium-sulfate-containing waste effluent from an acrylonitrile, caprolactam or acetonitrile manufacturing facility. In one such process the effluent is fed to a dee... | 07/16/1996 |
| 5536384 | Separation of sulphides from pulping liquors by electrodialysis A process using an electrodialysis system employing cation-selective membranes and anion-selective membranes, particularly monovalent anion-selective membranes is used to separate kraft pulping liquors into two streams; one that is rich in sulphides (to b... | 07/16/1996 |
| 5437774 | High molecular weight electrodialysis A charged first molecular species is separated from a second molecular species by selectively passing one of the species through a separation membrane under the influence of an electrical potential. The separated species is maintained within a dialysate s... | 08/01/1995 |
| 5106464 | Decreasing the concentration of hydroxyl ions in aqueous alkaline peroxide solutions Novel methods of decreasing the concentration of hydroxyl ions in an electrochemically generated alkaline peroxide aqueous solution consisting of partial neutralization of a stabilized solution of alkaline hydrogen peroxide, electrodialysis, and dialysis ... | 04/21/1992 |
| 4670117 | Electrodialytic method of growing water-soluble ionic crystal A solution of material for the desired crystal is filled in a growth tank having two ion-exchange membranes which define a crystal growth vessel between them and two side vessels on opposite sides of the crystal growth vessel, and the growth tank is place... | 06/02/1987 |
| 4051002 | Electrodialysis for aqueous solution of base In an electrodialysis process for aqueous base-containing solutions the improvement which comprises using a cation-exchange membrane made of a copolymer of ethylene and an unsaturated carboxylic acid or a salt thereof having an ion-exchange capacity of 0.... | 09/27/1977 |
| 4033842 | Production of monobasic potassium phosphate by electrodialysis A continuous process for the production by electrodialysis of monobasic potassium phosphate from phosphoric acid produced by the wet process and potassium sulfate produced as a by-product in processes for the recovery of aluminum from alunite.... | 07/05/1977 |
