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| Number | Title | Issue Date |
| 7604725 | Water treatment system and method The present invention is directed to a water treatment or purification system and method for providing treated water in industrial, commercial and residential applications. The treatment system provides treated or softened water to a point of use by removing at leas... | 10/20/2009 |
| 7390386 | Aqueous stream purifier and method of use An electrolytic method is provided for purifying an aqueous stream, including at least one contaminant ion. In one embodiment, the eluent stream flows through a purifying flow channel, including ion exchange bed, an electric field is applied through the flowing elue... | 06/24/2008 |
| 7338600 | Fractional deionization process A liquid treatment process is described for sequential removal of ionic species of progressively decreasing ionic strength without precipitation or “scaling.” An aspect of the invention includes two or more electrodeionization operations within one or more elect... | 03/04/2008 |
| 7326325 | Apparatus and method for connecting water treatment devices A method and apparatus for connecting water treatment devices is provided. Connecting brackets may allow for a multiple configurations of water treatment devices and can simplify the building of water treatment systems. ... | 02/05/2008 |
| 7279083 | Electrodeionisation apparatus An electrodeionisation apparatus comprising, successively: means defining an anode chamber, means defining one or more anion exchange chambers, means defining one or more mixed exchange chambers, means defining one or more cation exchange chambers, and means definin... | 10/09/2007 |
| 7201832 | Electrodeionization deionized water producing apparatus In the electrodeionization deionized water producing apparatus, water is passed through a deionizing chamber(s) packed with an organic porous ion exchange material having a three-dimensional network structure to remove ionic impurities in the water, thereby producin... | 04/10/2007 |
| 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 |
| 7141154 | Single-stage separation and esterification of cation salt carboxylates using electrodeionization A method of and apparatus for continuously making an organic ester from a lower alcohol and an organic acid is disclosed. An organic acid or salt is introduced or produced in an electrode ionization (EDI) stack with a plurality of reaction chambers each formed from ... | 11/28/2006 |
| 7094325 | EDI and related stacks and method and apparatus for preparing such Apparatus and method are disclosed for introducing ion exchange or other particulates into compartments of an already-assembled electrodeionization or comparable stack by modulating a flow of slurry into the compartments with slugs of gas such as air. The air propel... | 08/22/2006 |
| 7083733 | Water treatment system and method A water treatment system provides treated or softened water to a point of use by removing a portion of any hardness-causing species contained in water from a point of entry coming from a water source, such as municipal water, well water, brackish water and water con... | 08/01/2006 |
| 7033472 | Electrodeionization water producing apparatus and method of producing deionized water using same The electrodeionization water producing apparatus comprising a depletion chamber packed with an ion exchange material, the depletion chamber being partitioned by a cation exchange membrane on one side and an anion exchange membrane on the other side, and concentrate... | 04/25/2006 |
| 6951609 | High-purity water producing apparatus A module filled with an organic porous ion exchanger is placed midway on a pipe for transporting high-purity water to be supplied to a point-of-use. As the organic porous ion exchanger is used an organic porous ion exchanger having a three-dimensional mesh structure... | 10/04/2005 |
| 6929748 | Apparatus and method for continuous electrodeionization A method of water purification including the steps of passing source water through at least one reverse osmosis unit to produce a product water and reject water, directing the product water from a reverse osmosis unit into the dilution stream of a continuous electro... | 08/16/2005 |
| 6824662 | Electrodeionization apparatus and method An electrodeionization apparatus and method for purifying a fluid. A fluid, such as water, can be purified by removing weakly ionizable species from the fluid. Weakly ionizable species may be dissociated at different pH levels to facilitate removal from the fluid in... | 11/30/2004 |
| 6808608 | Water purifier and method An apparatus for removing charged contaminants from a water stream. The apparatus can be figured to provide the decontaminated water stream to an analytical system. Methods of use of the same are also disclosed. ... | 10/26/2004 |
| 6797140 | Electrodeionization method An electrodeionization method for continuously producing and or separating and/or concentrating ionizable organics present in dilute concentrations in an ionic solution while controlling the pH to within one to one-half pH unit method for continuously producing and ... | 09/28/2004 |
| 6726822 | Electrodeionization process An improved electrodeionization system for removing ions from liquids passed therethrough, comprising a flow-through electrodeionization module, and a power supply electrically connected to the electrodeionization module electrodes so as to establish a voltage gradi... | 04/27/2004 |
| 6596145 | Electrodeionization module An electrodeionization (EDI) module is formed from an anode spaced apart from a cathode, one or more waste channels formed between the electrodes and a product channel located inward of the waste channel(s). Ion permeable membranes form the boundary betwe... | 07/22/2003 |
| 6565726 | Electrodeionization apparatus and method of operating the same Feed water, fed through an inlet 6 into a desalting compartment 8, flows around the end 4a of a anion-exchange membrane 4 surrounding an anode 2a. The feed water enters into a portion defined between the anion-exchange membrane 4 and a cation-exchange mem... | 05/20/2003 |
| 6565725 | Method for producing deionized water A method for producing deionized water by an electro-regenerating deionization method, which comprises employing a deionized water producing apparatus comprising an electrodialyzer, and ion exchangers being accommodated in the demineralizing compartments,... | 05/20/2003 |
| 6514398 | 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... | 02/04/2003 |
| 6495014 | Electrodeionization substrate, and device for electrodeionization treatment A porous immobilized ion-exchange material is provided. Also provided is an electrodeionization device incorporating the material. A method for subjecting a fluid to electrodeionization, is provided utilizing porous immobilized ion-exchange material. A sa... | 12/17/2002 |
| 6482304 | Apparatus and method of recirculating electrodeionization An electrodeionisation apparatus comprising a first deionising flow path and an integral second deionising flow path is described. The outflow from the first path is held in a holding tank prior to passage through the second flow path, and the outflow fro... | 11/19/2002 |
| 6471867 | Electro-regenerating type apparatus for producing deionized water An electro-regenerating type apparatus for producing deionized water, which comprises an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged between an anode compartment provided with an anode and a cathode c... | 10/29/2002 |
| 6461512 | Method of disinfecting a deionized water producing apparatus and method of producing deionized water A deionized water producing apparatus includes a pretreatment apparatus having a reverse osmosis apparatus, and an electrodeionization apparatus having a diluting compartment filled with an ion exchanger. In order to disinfect the deionized water producin... | 10/08/2002 |
| 6436261 | Electric deionizing apparatus and process for deionization using the same An electric deionizing apparatus comprising a first and a second electric deionizing apparatus arranged in series, in which water is deionized by the first electric deionizing apparatus and then deionized by the second electric deionizing apparatus, and a... | 08/20/2002 |
| 6416645 | Electrolytic process and apparatus for the controlled regeneration of modified ion exchangers to purify aqueous solutions An electrolytic process and apparatus is disclosed for oxidizing or reducing inorganic and organic species, especially in dilute aqueous solutions, and for water purification and treatment. The electrolytic reactor includes an anode, cathode and a packed ... | 07/09/2002 |
| 6402916 | Electrolytic process and apparatus controlled regeneration of modified ion exchangers to purify aqueous solutions and adjust ph An electrolytic process and apparatus are disclosed for water purification and pH adjustment. The electrolytic reactor includes an anode, cathode and a bed of particulate ion exchange material modified by converting a portion of the transfer sites to semi... | 06/11/2002 |
| 6365023 | Electrodeionization process An electrodeionization-based process for purifying water to remove ionic species is disclosed. Ionic removal is accomplished by supplying an electrical current between an anode and a cathode of an electrodeionization module in the range of about 1.5 to 15... | 04/02/2002 |
| 6312577 | Continuous electrodeionization apparatus and method A continuous electrodeionization apparatus and method. The continuous electrodeionization apparatus and method provide improved removal of weakly ionized ions, particularly silica. The apparatus and method involves using macroporous ion exchange resins th... | 11/06/2001 |
| 6296751 | Electrodeionization apparatus with scaling control First and second stages are used in electrodeionization to purify water including calcium and carbon dioxide and its hydrates. The diluting flow channels of the first stage include only anion exchange material or cation exchange material, and thus remove ... | 10/02/2001 |
| 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 |
| 6274018 | Electrodeionization apparatus comprising sub-desalination chambers Two sub-desalination chambers d1 and d2 are defined by a cation exchange membrane 3 on one side, an anion exchange membrane 4 on the other side, and an intermediate ion exchange membrane 5 in between and are filled with ion exchange ... | 08/14/2001 |
| 6207039 | Process for recovering onium hydroxides or onium salts from solutions containing onium compounds using electrochemical ion exchange In one embodiment, the present invention relates to a process for recovering one of an onium hydroxide and onium salt from a solution containing an onium compound involving the steps of charging the solution containing the onium compound to an electrochem... | 03/27/2001 |
| 6197174 | Method and apparatus for electrodeionization of water using mixed bed and single phase ion exchange materials in the diluting compartment The invention provides a method and apparatus for electrodeionizing water, whereby the water to be purified is passed through diluting compartments in an electrodeionization unit having an anode compartment at one end of the unit and a cathode compartment... | 03/06/2001 |
| 6187162 | Electrodeionization apparatus with scaling control First and second stages are used in electrodeionization to purify water including calcium and carbon dioxide and its hydrates. The diluting flow channels of the first stage include only anion exchange material or cation exchange material, and thus remove ... | 02/13/2001 |
| 6156180 | Electrodeionization apparatus having geometric arrangement of ion exchange material An electrodeionization apparatus adapted to remove ions from a liquid, the apparatus having a cathode proximate a first end of the apparatus and an anode proximate the opposite end of the apparatus and having a plurality of alternating diluting compartmen... | 12/05/2000 |
| 6149788 | Method and apparatus for preventing scaling in electrodeionization units A method and apparatus is provided for inhibiting scaling in an electrodeionization system and, more particularly, for increasing tolerance to hardness in the feed water to an electrodeionization unit by inhibiting precipitation of scale-forming metallic ... | 11/21/2000 |
| 5980716 | Water treatment apparatus for a fuel cell system Low conductivity cooling water for a fuel cell body is obtained by a water treatment apparatus which removes dissolved carbon dioxide gas in the exhaust gas condensate by a decarbonation column. Iron oxide is eliminated from the condensate as well as blow... | 11/09/1999 |
| 5948230 | 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... | 09/07/1999 |
