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| Number | Title | Issue Date |
| 8313657 | Method and system for removal of ammonia from wastewater by electrolysis A method and system are described to treat ammonia-containing wastewater or process waters. Sewage containing human or animal waste and certain process liquids, typically water, contains high levels of nitrogen in the form of ammonia. An electro-chemical method to e... | 11/20/2012 |
| 8277627 | Method and system for irrigation An electrically-driven separation apparatus can be utilized to desalinate seawater and/or brackish water to provide irrigation water having a desired sodium adsorption ratio (SAR). ... | 10/02/2012 |
| 8088266 | Electrodialysis method for purifying of silicate-containing potassium hydroxide etching solution An electrodialysis method for the treatment of silicate-containing potassium hydroxide etching waste solution is provided. The method comprises: providing a reaction tank including a cathode, an anode, and two cation dialysis membranes, wherein the reaction tank is ... | 01/03/2012 |
| 7807032 | Boron separation and recovery A process is provided for separating, concentrating and recovery of boron compound from aqueous solution containing boron, strongly dissociated anions and some cations. The process specifically integrates electrodialysis with ion exchange to selectively separate bor... | 10/05/2010 |
| 7699968 | Water purifying system The present invention provides a water purifying system capable of efficiently producing treated water containing boron at a low concentration. Water to be treated is first fed to the RO membrane apparatus 1 and the passed water is fed through the boron absor... | 04/20/2010 |
| 7399415 | Parking a sample stream and suppressing the sample Pretreatment method and apparatus to remove matrix ions from a liquid sample, prior to separation of the sample analytes (e.g. by chromatography), by flowing the liquid sample into a sample compartment and stopping the flow. The sample compartment has a wall compris... | 07/15/2008 |
| 7329399 | Hydrogen trapper compound, method for the production and uses thereof A hydrogen-trapping compound is provided, along with a process for manufacturing the compound, and its uses, wherein the hydrogen-trapping compound is characterized in that it contains at least one metal salt of formula MX(OH), in which M represents a divalent trans... | 02/12/2008 |
| 7311799 | Hydrofluoric acid wastewater treatment method and device The invention provides a hydrofluoric acid wastewater treatment method that achieves efficient recovery of hydrofluoric acid from hydrofluoric acid wastewater and also achieves sufficient reduction in the hydrofluoric acid concentration of the dehydrofluorinated wat... | 12/25/2007 |
| 7309408 | Industrial wastewater treatment and metals recovery apparatus An apparatus for industrial wastewater treatment and the electrolytic recovery of metals from solutions is disclosed. It comprises two or more plates with electricity conducting surfaces arranged in parallel and separated by insulating gaskets, two heads and a hydra... | 12/18/2007 |
| 7261874 | Gas phase electrolyzer process for producing hydrogen The invention provides a method for a sulfur based hydrogen production cycle wherein the sulfur products are maintained in a gaseous state throughout the cycle. The cycle includes a decomposition of a gaseous phase sulfur trioxide to sulfur dioxide and water in a de... | 08/28/2007 |
| 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 |
| 7169281 | Electrochemical pressurizer/purifier of hydrogen for operation at moderately elevated temperatures (including high-temperature electrochemical pump in a membrane generator of hydrogen) An generator of pure pressurized high pressure hydrogen comprising a molten hydroxide or eutectic mixture electrolyte pressurizing chamber bounded by a hydrogen-selective anode and a hydrogen-selective otherwise gas impermeable cathode respectively connected to a D.... | 01/30/2007 |
| 7147785 | Electrodeionization device and methods of use The present invention generally relates to purification systems, and to sanitization and/or sealing of the purification system. The purification system includes an electrodeionization device which can comprise one or a plurality of stages. The electrodeionization de... | 12/12/2006 |
| 7144735 | Electrodialysis method and apparatus for trace metal analysis An electrodialysis method and apparatus are provided for treating a sample including trace metals in a matrix. Advantageously, the present invention allows for highly accurate detection of trace contaminants in a solution sample, in particular trace metals, substant... | 12/05/2006 |
| 7135131 | Proton conductive membrane and production method thereof A proton conductive membrane according to the invention includes layered clay mineral powder which is a cation exchanger or an anion exchanger, and a crosslinking structure including an —O—SO2—O— group which crosslinks particles of the layered cla... | 11/14/2006 |
| 7083730 | Production of purified water and high value chemicals from salt water Sodium chloride and purified water are recovered by treating salt water that contains sodium chloride with an integrated reverse osmosis and electrodialysis system, which includes an efficiency-enhancing feature that is one or more of the following: the use of univa... | 08/01/2006 |
| 7066900 | Removal of metabolic components from blood An electrophoresis system for removing or reducing concentration of a metabolic component from blood or plasma of a subject is provided. A method for removing or reducing concentration or amount of a metabolic component in blood or plasma of a subject is also provid... | 06/27/2006 |
| 7048857 | Method and apparatus for metal removal ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 05/23/2006 |
| 6913696 | Separation of components of organic liquids A pervaporation process for separating organic liquid mixtures of components having differing polarities, uses an ion exchange membrane which comprises a polymerized alkene including pendant groups of formula SO2N(R)—A—QX where R is H or alkyl, A is a... | 07/05/2005 |
| 6890417 | Apparatus and method for refining alkaline solution An electrolytic bath is divided into an anodic chamber and a cathodic chamber by a cation-exchange membrane. A base alkaline solution of high impurity concentration is supplied into the anodic chamber from a tank of a base material as well as a circulating anolyte o... | 05/10/2005 |
| 6872292 | Voltage modulation of advanced electrochemical delivery system An electro-osmotic cell capable of substantially reducing zero-current transport is disclosed, wherein the cell includes a cell housing having a first half cell and a second half cell, with an ion selective membrane therebetween, a first electrode positioned within ... | 03/29/2005 |
| 6855121 | Blood-related dialysis and treatment A method of treating blood or plasma of a subject to remove metabolic contaminants by electrophoresis. Blood or plasma from the subject is placed in a first solvent stream, the first solvent stream being separated form a second solvent stream by an electrophoretic m... | 02/15/2005 |
| 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 |
| 6685809 | Methods for forming small-volume electrical contacts and material manipulations with fluidic microchannels A microfabricated device employing a bridging membrane and methods for electrokinetic transport of a liquid phase biological or chemical material using the same are described. The bridging membrane is deployed in or adjacent to a microchannel and permits ... | 02/03/2004 |
| 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 |
| 6495371 | Continuous electrolytically regenerated packed bed suppressor for ion chromatography For anion analysis, the method includes: (a) flowing an aqueous liquid sample stream containing anions to be detected and cation hydroxide through a separator bed, (b) flowing the aqueous effluent from the separator bed through a flow-through suppressor, ... | 12/17/2002 |
| 6328894 | Processes of purifying a dispersion and making inkjet inks A process to purify and classify a dispersion containing stabilized particles having counterions and ions as well as free species is disclosed. The solution may comprise an aqueous media, a solvent media, or a combination of both and can include more than... | 12/11/2001 |
| 6245389 | Method for circulating electroless nickel plating solution A method of circulating an electroless nickel plating solution is characterized in that the system comprises the following process steps effected in the following order: (A) a step of electrolessly plating nickel using a plating solution having nickel hyp... | 06/12/2001 |
| 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 |
| 6077434 | Current-efficient suppressors and method of use A method and apparatus for increasing the current efficiency of suppressor and suppress-like pretreatment devices is disclosed for the purpose of suppressing a high concentration of eluent without the detrimental effects of excess heat generation. The met... | 06/20/2000 |
| 5945192 | Sealing assembly for a solid polymer ion exchange membrane An assembly consisting of at least one seal layer and a solid polymer ion exchange layer wherein the seal layer covers essentially only the region of the ion exchange layer which is to be sealed. The seal layer is made of porous polytetrafluoroethylene fi... | 08/31/1999 |
| 5863972 | Randomly segmented thermoplastic polyurethanes as matrix for electrochemical analysis of Ca++ ions Composition, comprising in homogeneous distribution A) at least one salt containing a lipophilic anion, B) a plasticiser-free thermoplastic randomly segmented polyurethane which is soluble in organic solvents, a polyurea or a polyurethane urea, which comp... | 01/26/1999 |
| 5855759 | Electrochemical cell and process for splitting a sulfate solution and producing a hyroxide solution sulfuric acid and a halogen gas The present invention relates to an electrochemical cell and a process for producing a hydroxide solution, sulfuric acid and a halogen gas from a hydrogen halide and a sulfate solution. In particular, the sulfate solution may be an alkali metal sulfate so... | 01/05/1999 |
| 5840191 | Process for the treatment of contaminated material A process for the decontamination of a medium including a particulate material contaminated with one or more organic species and one or more metal species, the process including the steps of: (1) treating said medium by breaking down the organic species b... | 11/24/1998 |
| 5785833 | Process for removing iron from tin-plating electrolytes A method is provided for removal of ferrous ions from a tin-plating electrolyte containing stannous ions in a multi-compartmented electrochemical cell equipped to convert the ferrous and stannous ions to insoluble hydroxides. The hydroxides, in an essenti... | 07/28/1998 |
| 5780704 | Process for treating plastic product A process for decomposing a thermoplastic polymer composition which comprises a polyhydroxycarboxylic acid base polymer as a primary component in an alkaline solution, recovering hydroxycarboxylic acid from the solution by electrodialysis or acid-precipit... | 07/14/1998 |
| 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 |
| 5766438 | Electrolyzer and a method of operating the same In an electrolyzer provided according to this invention, the polarity of electrodes is periodically inverted at very short intervals. This has the effect of allowing gases to be generated uniformly all over the surface of each electrode in the form of ext... | 06/16/1998 |
| 5597481 | Electrochemical pretreatment system for liquid sample analysis A system for pretreating sample streams including a concentrated matrix compound to neutralize the compound. The system includes an electrochemical membrane device in which sample flows through a sample flow channel of the device separated from a matrix i... | 01/28/1997 |
| 5569365 | Intermittent electrolytic membrane suppressor regeneration for ion chromatography A method and apparatus using suppression of eluents for the analysis of anions or cations in ion chromatography. The invention relates to the intermittent use of the electric field during electrochemical suppression to minimize background noise during det... | 10/29/1996 |
