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| Number | Title | Issue Date |
| 7875186 | Process for regenerating and protonating a weak-base anion exchange resin The invention consists of a water treatment process using selective and regenerable weak base anion exchange resins to remove any number of complex anions, especially oxyanions including perchlorate, nitrate, chlorate, arsenate, selenate, and chromate, from aqueous ... | 01/25/2011 |
| 7846338 | Ion exchange process A method is described that relates to reducing amounts of regenerant waste or increasing the concentration of regenerant waste from ion exchange processes. A method is described that may allow a batch ion exchange process to compete on these factors with continuous ... | 12/07/2010 |
| 7371326 | Water treatment/remediation system A treatment system passes feed water containing a contaminant such as perchlorate through a bed of strong base anion exchange resin that has been placed in a form (e.g., in sulfate form) to selectively capture the contaminant while passing other ions (e.g., nitrate)... | 05/13/2008 |
| 7361281 | High efficiency ion exchange system and method for removing chromium from water The disclosed invention is a fixed bed ion exchange water purification system. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate the effects of moving resin beds from one operating position to anothe... | 04/22/2008 |
| 7341662 | Distribution and collection headers for a filter bed A filtration vessel has an inlet for inflow into the filtration vessel of liquid media to be filtered, a body of filter media in the filtration vessel, and a drain to receive filtered liquid media for take off from the filtration vessel. The inlet is configured to i... | 03/11/2008 |
| 7329354 | Purification of organic solvent fluids A chemical distribution system having improved organic solvent fluid purity and consistency includes a vessel containing ion-exchange media positioned within a fluid flow pathway such that the organic solvent fluid passes through the ion-exchange media, thereby effe... | 02/12/2008 |
| 7291122 | Hemofiltration methods for treatment of diseases in a mammal A hemofiltration system and method to treat an Inflammatory Mediator Related Disease in a mammal, including chronic and acute diseases, include a hemofilter and an adsorptive device. The hemofilter removes ultrafiltrate from a blood stream extracted from the mammal ... | 11/06/2007 |
| 7291272 | Inorganic contaminant removal from water A method is provided for removing an inorganic ionic species or organometallic ion contaminant, or combination contaminants, including such as arsenic, chromium, bromide, bromate, perchlorate, and/or others from water which contains an unacceptably high concentratio... | 11/06/2007 |
| 7273555 | Process for continuous ion exchange A process for continuous countercurrent ion exchange comprises piping a contaminated feed stream into a closed loop ion exchange contactor. The contactor is an ion exchange bed that has three or more reaction segments. The segments are comprised of at least an adsor... | 09/25/2007 |
| 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 |
| 7160430 | Electrochemical treatment of ammonia in waste-water In a sewage treatment plant, dissolved ammonium is extracted from the waste-water stream, and is transferred to a body of secondary water. The secondary water is passed through an electrolysis station, where the ammonium is transformed to nitrogen gas. The capture a... | 01/09/2007 |
| 7157005 | Regenerant reuse The invention provides a method for recycling the waste regenerant from softeners. The method includes passing a high concentration of monovalent ionic halide salt through a resin bed. The high monovalent cation concentration causes the divalent cations on the resin... | 01/02/2007 |
| 7132052 | System for the purification and reuse of spent brine in a water softener System and method for purifying and recycling spent brine in a water softener are provided. The system may be made up of a cation exchange resin tank fluidly coupled for passing spent brine comprising monovalent and divalent ions. A fluid mixer valve is coupled to t... | 11/07/2006 |
| 7067062 | Closed end regeneration method A nanoporous reactive adsorbent incorporates a relatively small number of relatively larger reactant, e.g. metal, enzyme, etc. particles (10) forming a discontinuous or continuous phase interspersed among and surrounded by a continuous phase of smaller adsorb... | 06/27/2006 |
| 7041223 | High efficiency ion exchanges system for removing contaminants from water The disclosed invention is a fixed bed ion exchange water purification system. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate the effects of moving resin beds from one operation position to anothe... | 05/09/2006 |
| 6972091 | Ion exchange resin plant An ion exchange resin plant for the demineralizing or softening water with an arrangement that allows the plant to operate continuously. The plant tank is divided into to two separate compartments that work simultaneously. One compartment effects water demineralizat... | 12/06/2005 |
| 6962657 | Water treatment system A water treatment system for removing hard ions from source water. The water treatment system is of the type that includes a pair of ion-exchange water softener tanks connectable to a source of pressurized water and with a water system to supply softened water to th... | 11/08/2005 |
| 6926835 | Water softening device Sampling pipes 21 and 22 are inserted, separated from outlet openings, into first and second water softeners 4 and 11. Raw water flows through first water softener 4, and raw water does not flow through second water softener 11 | 08/09/2005 |
| 6919030 | Process for recovering cyanide from copper-containing feed material A process for recovering cyanide from feed material containing cyanide and copper involves the steps of: (a) contacting the feed material with a strong base anion exchange resin whereby copper and cyanide from the feed material are adsorbed onto the resin; (b) conta... | 07/19/2005 |
| 6911481 | Method of regenerating ion exchange resin A method of regenerating an ion exchange resin, comprising the steps of packing a used ion exchange resin in a regeneration tower; and repeating at least twice a step comprising passing an aqueous solution of regenerant through the regeneration tower downward from a... | 06/28/2005 |
| 6908560 | Zero brine, zero rinse water process for treatment of contaminated drinking water for removal of arsenic An ion exchange process for removing arsenic from drinking water is disclosed which uses a mixed ion regenerant and generates minimal levels of waste. ... | 06/21/2005 |
| 6878284 | Method and apparatus of treating water containing a nitrogen compound A method of treating water containing a nitrogen compound, and an apparatus of treating water containing a nitrogen compound at high speed without using a biologically unstable treatment causing eutrophication in lakes and swamps. The waste water is introduced into ... | 04/12/2005 |
| 6878285 | Ion-exchange based fluid treatment systems A process for removing soluble and insoluble inorganic, organic, and microbiological contaminants from a fluid stream employing a pretreatment module, a post-treatment module, a recharge stream module or any combination thereof, and an ion exchange module, is provid... | 04/12/2005 |
| 6878286 | High efficiency ion exchange system for removing contaminants from water The disclosed invention is a fixed bed ion exchange water purification system. It employs a combination of electronically controlled process steps and specific systems configurations to duplicate the effects of moving resin beds from one operating position to anothe... | 04/12/2005 |
| 6821434 | System for removal of arsenic from water Systems for removing arsenic from water by addition of inexpensive and commonly available magnesium oxide, magnesium hydroxide, calcium oxide, or calcium hydroxide to the water. The hydroxide has a strong chemical affinity for arsenic and rapidly adsorbs arsenic, ev... | 11/23/2004 |
| 6800203 | Catalytic destruction of perchlorate in ferric chloride and hydrochloric acid solution with control of temperature, pressure and chemical reagents A method is described to decompose perchlorate in a FeCl3/HCl aqueous solution such as would be used to regenerate an anion exchange resin used to remove perchlorate. The solution is mixed with a reducing agent, preferably an organic alcohol and/or ferrou... | 10/05/2004 |
| 6776913 | Water softening method and apparatus for use therewith The present invention generally relates to the removal of certain salts, such as those of calcium or magnesium, from water. More particularly, the present invention is directed to a method for efficiently softening water containing certain ions in a manner which lim... | 08/17/2004 |
| 6736976 | Fluid treatment process A fluid treatment device for reducing the level of a chemical compound in a fluid. The device comprises: a fluid inlet; a fluid outlet; a flow-through fluid treatment zone having comprising: a radiation source, an adsorbent and a photocatalyst. The fluid treatment z... | 05/18/2004 |
| 6641737 | Vertical filter A liquid filtering apparatus is placed in a vessel having a bed of filtration material and an intake for introducing unfiltered liquid, that includes a washbox, an airlifting tube extending from the washbox and including an intake end and means for introd... | 11/04/2003 |
| 6593379 | Method for converting a weakly acid ion exchanger material from the H form into the Ca form The invention relates to a method and a device for converting a preferably weak acid ion-exchange material from the H form into the Ca form, according to which the ion-exchange material is brought into contact with an aqueous, preferably saturated, Ca(OH)... | 07/15/2003 |
| 6475390 | Process for the purification of nutrients from food process streams A separation process is described for separation of a nutrient from divalent ions of an aqueous solution. The aqueous solution is contacted with an ion exchange resin that includes monovalent ions until the concentration of divalent ions in the aqueous so... | 11/05/2002 |
| 6436719 | Displacement chemical regeneration method and apparatus A method of chromatographically separating ionic species in an aqueous electrolyte-containing eluent to form an effluent, suppressing the effluent, detecting the suppressed effluent and passing the detected effluent to a regenerant reservoir, thereby disp... | 08/20/2002 |
| 6416670 | Regenerable hydrocarbon filter There is provided a process for removing hydrocarbons from hydrophilic solutions in which the adsorbent is regenerated in situ. A solution containing at least one hydrocarbon impurity is passed through a resin bed and the hydrocarbon is retained by the re... | 07/09/2002 |
| 6383540 | Method of processing whey for demineralization purposes A method of treating whey for demineralization purposes, the method comprising a stage of separating out salts by transfer through electrodialysis or nanofiltration membranes, wherein, upstream from this separation stage, the method comprises in successio... | 05/07/2002 |
| 6375851 | Continuous liquid purification process The invention includes an operating method for the continuous purification of a liquid utilizing either single or dual ion exchange vessels, each vessel being physically divided into one or more discrete of ion exchange zones, each zone having an inlet an... | 04/23/2002 |
| 6361696 | Self-regenerative process for contaminant removal from liquid and supercritical CO2 fluid streams A method for the decontamination of fluid (liquid or supercritical) carbon dioxide fluid, especially of hydrocarbon contaminants, down to ࣘ100 ppb concentration are described. The critical component is a high silica zeolite, preferably a high silica Y-t... | 03/26/2002 |
| 6334886 | Removal of corrosive contaminants from alkanolamine absorbent process A process is provided for removing CO2 and/or H2 S from a gas mixture containing as impurities CO2 and/or H2 S and at least one other impurity selected from the group consisting of a cyanide and ammonia. The pro... | 01/01/2002 |
| 6245128 | Process for the reclamation of spent alkanolamine solution A process for the reclamation of spent aqueous alkanolamine solutions by contacting a spent aqueous alkanolamine solution with a strong base ion exchange resin for time sufficient to sorb from the aqueous alkanolamine solution at least a portion of the ac... | 06/12/2001 |
| 6214233 | Process for simultaneous oxidation of cyanide and recovery of heavy metals from waste water A waste water stream containing cyanide bearing compounds and heavy metals such as copper, silver, nickel, iron and the like is directed from a source after pH adjustment to a first tank containing adsorption material in the form of granular activated car... | 04/10/2001 |
| 6200364 | Process for eluting precious metals from activated carbon A process is disclosed for the recovery of gold and/or silver values from activated carbon, wherein they are adsorbed as cyanide complexes. The process uses an eluant containing sugar. The process allows the eluant to pass through fresh carbon twice, ther... | 03/13/2001 |
