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| Number | Title | Issue Date |
| 7790016 | Integrated electrolytic-electrodialytic apparatus and process for recovering metals from metal ion-containing waste streams An apparatus and method for the electrolytic and electrodialytic removal of metal ions from wastewater in a single cell. A battery of cells, each of which consists of a cathode, anode, anion exchange membrane and cation exchange membrane, is used. The battery of cel... | 09/07/2010 |
| 7342774 | Advanced valve metal anodes with complex interior and surface features and methods for processing same The present invention generally relates to improved capacitors; in particular, the present invention provides advanced valve metal (AVM) anodes and methods for fabricating AVM anodes having complex surface and interior features for use in high energy density capacit... | 03/11/2008 |
| 7310219 | Electrochemical capacitor The present invention relates to an electrochemical capacitor, and provides an electrochemical capacitor which has a fully lowered internal resistance and can yield excellent charging/discharging characteristics. The electrochemical capacitor of the present inventio... | 12/18/2007 |
| 6787021 | Purification of onium hydroxides by electrodialysis This invention relates to a process for improving the purity of an aqueous onium hydroxide solution. In particular, the invention relates to a process for improving the purity of aqueous onium hydroxide solutions containing undesirable amounts of anions. The inventi... | 09/07/2004 |
| 6565736 | WET PROCESS FOR SEMICONDUCTOR DEVICE FABRICATION USING ANODE WATER CONTAINING OXIDATIVE SUBSTANCES AND CATHODE WATER CONTAINING REDUCTIVE SUBSTANCES, AND ANODE WATER AND CATHODE WATER USED IN THE WET PROCESS A wet process performed in the manufacture of semiconductor devices with cathode water and anode water produced from electrolyte using a 3-cell electrolyzer having an intermediate cell for the electrolyte. The 3-cell electrolyzer includes an anode cell, a... | 05/20/2003 |
| 6413409 | Flow-through capacitor and method of treating liquids with it A separator (1), electrode (2) and collector (3), each made of a polygonal sheet, are stacked up in a multi-layer serial arrangement of [3/2/1/2] sub n /3, with the provision of a through-hole in the respective sheets in the corresponding posit... | 07/02/2002 |
| 6284124 | Electrodeionization apparatus and method Electrodeionization apparatus and method. The electrodeionization apparatus includes an ion-depleting compartment in which alternating layers of an electroactive media are positioned. One of the alternating layers is doped to provide a more balanced curre... | 09/04/2001 |
| 6217743 | Process for recovering organic hydroxides from waste solutions In one embodiment, the present invention relates to a process for recovering an onium compound from waste solutions or synthetic solutions containing the onium compound and impurities including the steps: contacting the waste solution or synthetic solutio... | 04/17/2001 |
| 6126810 | Generation of active chlorine in the presence of an organic load from sodium chloride in water A recirculation system for electrochemically activated antimicrobial solutions returns antimicrobial solution which has been depleted of active antimicrobial species to a electrolytic cell for regeneration of the active species. Organic load, which freque... | 10/03/2000 |
| 5961803 | Leaching process An increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the recovery boiler. Chloride and potassium increase inter alia the stickiness of carryover deposits and dust particles to the recovery boiler tu... | 10/05/1999 |
| 5951845 | Process for recovering organic hydroxides from waste solutions In one embodiment, the present invention relates to a process for recovering an organic hydroxide from waste solutions containing the organic hydroxide and impurities including the steps: contacting the waste solution with a metal ion scavenger to remove ... | 09/14/1999 |
| 5888357 | Apparatus and method for producing ionic water and system and method for producing electrolytic ionic water The present invention provides an apparatus and a method for producing ionic water which are capable of producing ionic water containing a low concentration of electrolyte with high reproducibility. The present invention also provides an apparatus and a m... | 03/30/1999 |
| 5876590 | Electrochemical leaching of soil An electrochemical leaching system for cleaning contaminated fines. The system has a waste vessel for receiving and holding a contaminated fines and lixiviant mixture. On a side of the waste vessel is an anolyte vessel holding an anolyte fluid. An anolyte... | 03/02/1999 |
| 5846397 | Plant and process for achieving structured waters of the "I" type-inhibitively activated and "S" type stimulatively activated An apparatus is disclosed for obtaining inhibitively active "I" water and stimulatively activated "S" water which comprises: a parallelipipedic column having an open top; a support for said column; a cover closing said top of said column; at least one electrode ass... | 12/08/1998 |
| 5783790 | Wet treatment method A surfactant is added to anodic or cathodic water obtained by electrolyzing deionized water or high-purity water. Then, an object of treatment is treated with the anodic or cathodic water containing the surfactant. The object of treatment may be treated, ... | 07/21/1998 |
| 5756874 | Electrochemical cell for processing organic wastes An electrochemical cell (20) which is effectively leakproof and can be incorporated into an easily serviceable cell pack (80). Within the cell are a plurality of parallel electrode plates (44, 46, 56) which act as anode and cathode reaction surfaces for p... | 05/26/1998 |
| 5733434 | Apparatus and method for cleaning semiconductor wafers An improvement is proposed in the cleaning treatment of semiconductor silicon wafers in which the conventional step of cleaning with an aqueous solution of an acid is replaced with a cleaning treatment with a temporarily acidic pure water which is produce... | 03/31/1998 |
| 5725753 | Apparatus and method for cleaning semiconductor wafers An improvement is proposed in the cleaning treatment of semiconductor silicon wafers in which the conventional step of cleaning with an aqueous solution of an alkali is replaced with a cleaning treatment with a temporarily alkaline pure water which is pro... | 03/10/1998 |
| 5720869 | Equipment and process for producing high-purity water A high-purity water producing equipment comprises a primary purification treatment system, a primary deionized water tank, a secondary purification treatment system for producing high-purity water from a primary deionized water, a circulatory system pipe ... | 02/24/1998 |
| 5705050 | Electrolytic process and apparatus for the controlled oxidation and reduction of inorganic and organic species in aqueous solutions Improvements on the electrolytic reactor and process of U.S. Pat. No. 5,419,816 and copending U.S. application Ser. No. 08/400,950, filed Mar. 9, 1995, now U.S. Pat. No. 5,609,742, are disclosed for the controlled oxidation and reduction of inorganic and ... | 01/06/1998 |
| 5679229 | Electrodialysis including filled cell electrodialysis (electrodeionization) Improved electrodialysis (ED) stacks are disclosed having one or more components selected from the group: a) cation exchange membranes having ion exchange groups predominantly sulfonic acid groups and a minor amount of weakly acidic and/or weakly basic gr... | 10/21/1997 |
| 5679228 | Electrodialysis including filled cell electrodialysis (electrodeionization) Improved electrodialysis (ED) stacks are disclosed having one or more components selected from the group: a) cation exchange membranes having ion exchange groups predominantly sulfonic acid groups and a minor amount of weakly acidic and/or weakly basic gr... | 10/21/1997 |
| 5616221 | Electrolytic ionized water producing apparatus An electrolytic ionized water (EIW) producing apparatus comprises an anode, a cathode, an electrolyzer which includes an anode chamber, a cathode chamber and an intermediate chamber, inlet lines for supplying an influent water to the three chambers, and o... | 04/01/1997 |
| 5599438 | Method for producing electrolyzed water The method for producing electrolyzed water includes the step of applying a voltage to electrodes disposed in an electrolytic cell containing therein pure water including electrolyte therein. A strength of an electric field generated by applying a voltage... | 02/04/1997 |
| 5593563 | Electrodeionization process for purifying a liquid In an electrodeionization apparatus having a cathode compartment and an anode compartment for removing ions from a liquid under the influence of a voltage, the cathode compartment includes electron conductive particles such as metal particles and/or carbo... | 01/14/1997 |
| 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 |
| 5259936 | Purified ion exchange resins and process Purified resin particles are provided in an electrodeionization step for purifying resin particles having ion depletion compartments containing the resin particles and ion concentration compartments. Purified water having a purity of at least 1 megohm-cm ... | 11/09/1993 |
| 5141610 | Electrodialytic process for restoring sodium hydroxide etchants for aluminum A solution, sol or colloidal dispersion of a substantially water insoluble metal hydroxide or acid and an alkali metal hydroxide are electrodialytically converted to a solid substantially water insoluble metal hydroxide or acid and a solution of the alkal... | 08/25/1992 |
| 5089097 | Electrolytic method for recovering silver from waste photographic processing solutions The improved method and apparatus for recovering silver from a waste photographic processing solution, in which the waste solution is supplied into the cathode compartment of an electrolytic cell which is separated from an anode compartment by a diaphragm... | 02/18/1992 |
| 5047126 | Method for recovering metal from waste stream An electrolytic treatment method and a unit in which such a method is practiced are provided wherein heavy metal hydrous oxides are precipitated and recovered from a dilute waste stream to render the waste stream suitable for discharge. The waste stream i... | 09/10/1991 |
| 5045204 | Method and apparatus for generating a high purity chromatography eluent A method and apparatus has been provided for generating a high purity aqueous stream with selected ionic species--either cation (e.g. sodium) or anion (e.g. sulfate) and suitable for use as a chromatography eluent. In one form, an eluent generating means ... | 09/03/1991 |
| 4830721 | Electrochemical deoxygenation process for corrosion control in deionized waters The present invention relates to an electrochemical process for deoxygenating deionized water utilizing a membrane electrolyzer and optionally a catalytic reactor, characterized in that operation is carried out at ambient temperature avoiding the need for... | 05/16/1989 |
| 4457816 | Electrolysis method for decomposing water into hydrogen gas and oxygen gas An electrolysis apparatus decomposes water into hydrogen gas and oxygen gas. The apparatus comprises a housing for the water to be decomposed, a plurality of symmetrically folded and edged unipolar electrodes for decomposing the water held in the housing,... | 07/03/1984 |
| 4445987 | Electrolytic purification and reconcentration of wash and rinse caustic solutions recovered from the regeneration of ion exchange resins Diluted and contaminated caustic solutions coming from the regeneration and washing of ion exchange resins may advantageously be purified and reconcentrated to be reused during the subsequent regeneration cycles, by subjecting the contaminated solution to... | 05/01/1984 |
| 4396475 | Process for continuously regenerating ferric chloride solutions The continuous electrolytic regeneration of ferric chloride solutions used for etching metals is effected by transferring the partially exhausted solution to the anodic space of an electrolyzer where it is exposed to direct current. The etched metal is de... | 08/02/1983 |
| 4172774 | Method and apparatus for lessening ionic diffusion A membrane assembly, useful as a membrane in electrodialytic and electrolytic cells, is made by holding together a plurality of thin layers of membrane material under pressure and with boundary layers of liquid covering their major surfaces. Such membrane... | 10/30/1979 |
| 3963567 | Electrolyticdialysis Sea water is deionized with simultaneous production of caustic soda, chlorine, and hydrogen by a novel electrodialysis process wherein sodium and chlorine ions are separated from said sea water, and said ions, while separated from each other, are electric... | 06/15/1976 |
