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| Number | Title | Issue Date |
| 8007647 | Retention of counterions in the separative bioreactor A bioreactor with an anode and a cathode, and a plurality of reaction chambers each having an inlet and an outlet and each including a porous solid ion exchange wafer having ion-exchange resins. Each of the reaction chambers is interleaved between a cation exchange ... | 08/30/2011 |
| 7959780 | Textured ion exchange membranes A textured water-splitting membrane comprises an anion exchange layer abutting a cation exchange layer to form a heterogeneous water-splitting interface therebetween, and a textured surface having a pattern of texture features comprising spaced apart peaks and valle... | 06/14/2011 |
| 7780833 | Electrochemical ion exchange with textured membranes and cartridge An electrochemical cell 102 comprises an ion exchange membrane 10 having anion and cation exchange materials. The membrane 10 can have separate anion and cation exchange layers 12, 14 that define a heterogeneous water-splitting interface ... | 08/24/2010 |
| 7427342 | Method and apparatus for shifting current distribution in electrodeionization systems An electrodeionization (EDI) apparatus and method comprising an ion-depleting chamber for removing ions from liquids passed therethrough, wherein a resistive component is coupled proximate the outlet region of the chamber so as to increase the electrical resistance ... | 09/23/2008 |
| 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 |
| 7344629 | Selectable ion concentrations with electrolytic ion exchange An apparatus to treat an influent solution comprising ions to obtain a selectable ion concentration in an effluent solution. The apparatus comprises an electrochemical cell comprising a housing comprising first and second electrodes. A water-splitting ion exchange m... | 03/18/2008 |
| 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 |
| 7291274 | Method of deionising and clarifying the aqueous medium used in an electrical discharge machine and the product used in said method Deionisation and clarification process of the aqueous medium used in an electroerosion machine and product for this process, where the electroerosion machines are comprised of a purification circuit for this aqueous medium, which includes an ion exchange phase betwe... | 11/06/2007 |
| 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 |
| 7238266 | Method and apparatus for fluorine generation and recirculation The invention relates to apparatus and methods for generating and recycling fluorine. The applicants recognized that a fluorine separator, used either alone or in combination with a plasma generator can produce sufficient quantities of fluorine at its point of use f... | 07/03/2007 |
| 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 |
| 7179363 | Electrolytic process for generating chlorine dioxide An electrolytic process for generating chlorine dioxide. An aqueous feed stream of an alkali metal chlorite solution is treated with chlorine gas or a mixture of hydrogen chloride and hypochlorous acid formed in an anode compartment from, an aqueous alkali metal chl... | 02/20/2007 |
| 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 |
| 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 |
| 6913741 | System and process for producing halogen oxides A system and process for oxidizing inorganic or organic species is disclosed. The system and process includes feeding a dilute aqueous alkali metal halite solution into a cation exchange column, wherein the cation exchange column contains a cation exchange material;... | 07/05/2005 |
| 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 |
| 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 |
| 6656338 | Method and device for reducing cationic impurities and for dosing lithium in the cooling water of a light water reactor, and a cooling-water system of a light water reactor having such a device For dosing lithium in cooling water containing cationic impurities or for reducing cationic impurities, the invention guides cooling water cycle through a first side of an electrodialysis unit and guides a concentration cycle through a second side of the ... | 12/02/2003 |
| 6541228 | Electrodialysis methods for purification and recovery of gluconic acid derivatives A process for purifying and concentrating a gluconic acid derivative, such as 2-keto-L-gulonic acid, comprising introducing a non-viable and/or acidified fermentation medium or an in-vitro reactor medium comprising at least the gluconic acid derivative an... | 04/01/2003 |
| 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 |
| 6508985 | Continuous electrolytically regenerated packed bed suppressor for ion chromatography An electrolyitic suppressor including (a) a suppressor bed of ion exchange resin, (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the suppressor bed from the first electrode chambe... | 01/21/2003 |
| 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 |
| 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 |
| 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 |
| 6423199 | Electrochemical ion exchange using carbollide systems An electrochemical ion exchange cell comprises a metal carbollide as ion exchange material. The carbollide is preferably a polynuclear cobalt dicarbollide and is typically substituted by chlorine. Also novel are polynuclear metal carbollides comprising a ... | 07/23/2002 |
| 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 |
| 6325976 | Continuous electrolytically regenerated packed bed suppressor for ion chromatography An electrolyitic suppressor including (a) a suppressor bed of ion exchange resin, (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the suppressor bed from the first electrode chambe... | 12/04/2001 |
| 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 |
| 6280599 | Electrochemical treatment of ion exchange material A method of treating an ion exchange material, the method including: (a) positioning at least two regions of ion exchange material between an anode and cathode electrode, wherein at least a portion of the two regions being in electrical contact and being ... | 08/28/2001 |
| 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 |
| 6254753 | High purity electrodeionization Electrodeionization apparatus for purifying water 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 betw... | 07/03/2001 |
| 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 |
| 6187570 | Electrodialysis methods for purification and recovery of gluconic acid derivatives A process for purifying and concentrating a gluconic acid derivative, such as 2-keto-L-gulonic acid, comprising introducing a non-viable and/or acidified fermentation medium or an in-vitro reactor medium comprising at least the gluconic acid derivative an... | 02/13/2001 |
