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| Number | Title | Issue Date |
| 8101087 | Element removal process A process and apparatus for removing elements is described herein. ... | 01/24/2012 |
| 8070962 | Using oxidizing agents to remove thiocyanates from brines A method for reclamation of a brine that includes mixing a brine containing thiocyanates with an oxidizing agent; and allowing for a time sufficient for the oxidizing agent to oxidize at least a portion of the thiocyanates is disclosed. Other methods may also includ... | 12/06/2011 |
| 7442311 | Emulsion and effluent treatment processes An emulsion and affluent process which treats and breaks very tight emulsions and separates dissolved solids from associated fluids produced in industry, whereby solids and fluids are separated into clean interfacial phases thus providing an improved quality saleabl... | 10/28/2008 |
| 7374690 | Processes for removing oil from solid wellbore materials and produced water Processes for removing oil from a solid wellbore material such as drill cuttings or water such as produced by a subterranean formation include contacting the solid material/water with an amino-substituted polymer such as chitosan and a halogenating agent. The oil se... | 05/20/2008 |
| 7354733 | Method for sorting and separating living cells We disclose methods of sorting or separating mixtures of living cells (e.g., eukaryotic, prokaryotic, mammalian, pathogenic, bacterial, viral, etc.). We perform our methods by activating cell-selective photophoric labels, which photosensitize and chemically reduce a... | 04/08/2008 |
| 7332002 | Low sulfur coal additive for improved furnace operation The present invention is directed to additives for coal-fired furnaces, particularly furnaces using a layer of slag to capture coal particles for combustion. The additive(s) include iron, mineralizer(s), handling aid(s), flow aid(s), and/or abrasive material(s). The... | 02/19/2008 |
| 7326346 | High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/05/2008 |
| 7261820 | Method for decreasing a concentration of metal in aqueous solution A method and system for decreasing the concentration of at least one metal in an aqueous solution. The metal may be molybdenum, tungsten, or both. An aqueous solution is introduced into at least one reaction zone, and at least one source of hydroxide ions is provide... | 08/28/2007 |
| 7192527 | Processes for removing oil from solid wellbore materials and produced water Processes for removing oil from a solid wellbore material such as drill cuttings or water such as produced by a subterranean formation include contacting the solid material/water with an amino-substituted polymer such as chitosan and a halogenating agent. The oil se... | 03/20/2007 |
| 7183235 | High capacity regenerable sorbent for removing arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/27/2007 |
| 7166228 | Method of treating a subsurface formation with ferrous iron to reduce contaminants to harmless species A method for treating a subsurface formation with a ferrous compound, to reduce a contaminant therein, involves introducing into the subsurface formation a ferrous compound in combination with sodium hydrosulfite in an amount sufficient to substantially prevent prec... | 01/23/2007 |
| 7147783 | Method for reducing hydrogen sulfide emissions from wastewater A cost-effective method for reducing the dissolved sulfide content in a wastewater stream and thereby hydrogen sulfide emissions therefrom involving the steps of adding a transition metal salt to the wastewater stream at the upper reaches of a wastewater collection ... | 12/12/2006 |
| 7070685 | Method and device for decontaminating water which contains metal and/or is radioactively contaminated The invention relates to an efficient process and device for the decontamination of waters polluted with heavy metals, semimetals and/or radionuclides by cation exchange and electrochemical deposition of the anions. ... | 07/04/2006 |
| 7063793 | Apparatus and method for removing mercury and mercuric compounds from dental effluents The present invention is directed to processes for removing a contaminant from dental effluents and includes transporting a three-phase effluent through a suction line into a particle collection vessel, introducing a suction line cleaning solution which includes a r... | 06/20/2006 |
| 7048781 | Chemically-impregnated silicate agents for mercury control The present invention is directed to a contaminant removal agent comprising a polyvalent metal sulfide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered sil... | 05/23/2006 |
| 7045339 | Electron donors for chlorinated solvent source area bioremediation Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. An illustrative method includes adding a composition to the ground water wherein the composition is an electron donor for microbe-mediated reductive... | 05/16/2006 |
| 7033498 | Cartridges useful in cleaning dialysis solutions Cartridges useful in regenerating or purifying dialysis solutions are described as well as methods to regenerate or purify spent dialysis solutions. Dialysis systems using the sorbent cartridges of the present invention are further described. ... | 04/25/2006 |
| 6955762 | Method of cleaning membranes The present invention relates a method for cleaning polymeric microfiltration membranes and membrane units, and to compositions useful in such methods. The compositions include at least one soluble sulfite reducing agent and a compatible solvent. ... | 10/18/2005 |
| 6954113 | Programmable oscillator circuit A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. ... | 10/11/2005 |
| 6942807 | Iron powder and sand filtration process for treatment of water contaminated with heavy metals and organic compounds A water filtration device (3) and method which removes heavy metals and organic compounds from raw water is provided. ... | 09/13/2005 |
| 6942840 | Method for removal and stabilization of mercury in mercury-containing gas streams The present invention is directed to a process and apparatus for removing and stabilizing mercury from mercury-containing gas streams. A gas stream containing vapor phase elemental and/or speciated mercury is contacted with reagent, such as an oxygen-containing oxid... | 09/13/2005 |
| 6921487 | Removal of zinc salts from nonaqueous synthesis solutions comprising zinc alkoxides or zinc amides A process for removing zinc from organic solutions comprising zinc alkoxides or zinc amides, includes admixing the solution with an alkylating, arylating, acylating or silylating agent in the presence of a precipitating reagent having at least two nitrogen donors an... | 07/26/2005 |
| 6921523 | Magnesium thiosulfate solution and process for preparing same An efficient process for the preparation of magnesium thiosulfate involves reaction of magnesium hydrosulfite and sulfur at elevated temperature. Magnesium hydrosulfite can be prepared from commercial magnesium oxide and sulfur. Sulfur dioxide can be used to maintai... | 07/26/2005 |
| 6916431 | Precipitating chemical The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mine... | 07/12/2005 |
| 6911570 | Method for fixating sludges and soils contaminated with mercury and other heavy metals The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal ... | 06/28/2005 |
| 6896817 | Essentially insoluble heavy metal sulfide slurry for wastewater treatment A product and method for the removal of pollutant heavy metals from aqueous solutions which precludes the end user from storing, handling, feeding and controlling hazardous soluble sulfide materials. The product is a slurry which includes a mixture of a liquid mediu... | 05/24/2005 |
| 6797178 | Method for removing mercury and mercuric compounds from dental effluents The present invention is directed to processes for removing a contaminant from dental effluents and includes transporting a three-phase effluent through a suction line into a particle collection vessel, introducing a suction line cleaning solution which includes a r... | 09/28/2004 |
| 6797195 | Method for recovering and separating metals from waste streams A method for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removed from waste streams and with minimal amounts of unprocessed solids and... | 09/28/2004 |
| 6780221 | Waste metal removal systems and methods A removal system for removing a waste metal from a waste solution. The removal system comprises outer and inner containers, inlet, intermediate, and outlet conduits, and first and second reaction media. The inner container defines an upper wall portion and is locate... | 08/24/2004 |
| 6770483 | Determination of multi-valent metal contamination and system for removal of multi-valent metal contaminants from water A test for determining the presence of multi-valent metal contaminants, such as arsenic, mercury and chromium, when present in certain valence states and a system for removal of these contaminants from water. Multi-valent metal salts, for example, Cr+6, w... | 08/03/2004 |
| 6761775 | Rinsewater separable and recyclable anaerobic curing impregnation compositions The present invention relates to anaerobic curing impregnation sealant compositions which are readily separable from water upon mixing. ... | 07/13/2004 |
| 6712910 | Rinsewater separable and recyclable heat curing impregnation compositions The present invention relates to heat curing impregnation sealant compositions, which are readily separable from water upon mixing. ... | 03/30/2004 |
| 6623646 | In-situ chemical oxidation-reduction and precipitation of heavy metals in soils and groundwater A method is taught for converting metal contaminants in the soil to less toxic forms as well as permitting their removal from groundwater. A first reactive solution comprising ferrous sulfate and an acid selected from the group consisting of sulfuric acid... | 09/23/2003 |
| 6582605 | Method of treating industrial waste waters A method of treating industrial wastewaters is provided. Specifically, the wastewater includes one or more organic contaminant materials and is pre-treated prior to filtering by the following steps The pH of the wastewater is adjusted to a pH in the range... | 06/24/2003 |
| 6558449 | Waste metal removal systems and methods A removal system for removing a waste metal from a waste solution. The removal system comprises outer and inner containers and inlet, intermediate, and outlet conduits. The outer container defines an outer chamber, and the inner container defines an inner... | 05/06/2003 |
| 6551517 | Method for transforming chemical structures in a fluid under pressure and in high temperature The present invention relates to a process for converting chemical structures, that is to say a process for the conducting of chemical reactions in a fluid under pressure and at temperature in a supercritical fluid in particular, containing a solvent and ... | 04/22/2003 |
| 6544421 | Method for purification of waste water and "RFLR" device for performing the same An embodiment of the present invention relates to a biological process for continues purification of waste water by converting its constituents to a solid form that can be easily separated using retainable biological catalysts and a novel reactor hereafte... | 04/08/2003 |
| 6540918 | Hydrocyclone separator A hydrocyclone separator comprising a truncated cone-shaped vessel having a tangential fluid stream inlet, a fluid stream outlet, a solid particle collector and a conical insert removably mounted between the truncated cone-shaped vessel and the solid part... | 04/01/2003 |
| 6531065 | Perchlorate removal methods Disclosed herein are chemical methods for reducing concentrations of perchlorate ion in sources of water to be used for potable purposes. The disclosed methods include contacting water containing perchlorate ion with iron metal to chemically reduce the pe... | 03/11/2003 |
| 6521128 | Treatment of water containing carbonaceous solids A process for treating which contains carbonaceous solids, includes subjecting the water to hydrolysis in a biological hydrolysis reaction stage, in the presence of sulfate ions, thereby to produce treated water, a slurry component, and a sulfur-containin... | 02/18/2003 |
