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| Number | Title | Issue Date |
| 7255841 | Sodium bicarbonate production method A method of producing sodium bicarbonate having a high degree of purity and obtaining a net reduction in effluent waste water, as compared to prior processes, when starting from trona ore is disclosed. The process entails utilizing the waste-water effluent stream fr... | 08/14/2007 |
| 7214355 | Production of lithium compounds directly from lithium containing brines Metal carbonates that are insoluble in water but that have a corresponding metal biocarbonate salt that is more than 75% by weight soluble in water are purified by preparing an aqueous slurry of the metal carbonate: introducing carbon dioxide gas to form a correspon... | 05/08/2007 |
| 7214290 | Treatment of spent caustic refinery effluents In the methods for treatment of caustic effluents described in the specification, a spent caustic refinery effluent is supplied to a submerged combustion gas evaporator in which hot combustion gas containing carbon dioxide is injected into the caustic liquid to conc... | 05/08/2007 |
| 7192564 | Method for recycling spent lithium metal polymer rechargeable batteries and related materials The method relates to a pyrometallurgical and hydrometallurgical process for the recovery and recycling of lithium and vanadium compounds from a material comprising spent rechargeable lithium batteries, particularly lithium metal gel and solid polymer electrolyte re... | 03/20/2007 |
| 7157065 | Production of lithium compounds directly from lithium containing brines A continuous process for directly preparing high purity lithium carbonate from lithium containing brines by preparing a brine containing about 6.0 wt % lithium and further containing other ions naturally occurring in brines; adding mother liquor containing carbonate... | 01/02/2007 |
| 7122249 | Abrasion-resistant agglomerate mineral substance granule, powder comprising such granules and production method therefor Granule comprising an agglomerate of particles of a mineral substance. The agglomerate is coated with a monolithic outer layer, which provides it with improved abrasion resistance. Powder comprising granules according to the invention. Process for manu... | 10/17/2006 |
| 6589497 | Process for preparing soda ash from solution mined bicarbonate brines A method for producing high grade soda ash from a solution mined brine containing sodium bicarbonate by processing the mine brine through a monohydrate crystallization step to the final product is described. The mine brine is treated to decompose and ther... | 07/08/2003 |
| 6403045 | Method for treating residues resulting from the purification of garbage and/or industrial waste incineration fumes A method for treating residues derived from garbage and/or industrial waste incineration fumes including the steps of desalting the residues by washing with sodium carbonate in sufficient amount or slightly in excess to solubilize all the salts including ... | 06/11/2002 |
| 5684071 | Additive for thermpolastic resins and flame retardant resin composition An additive having an improved dispersibility or adhesion property to thermoplastic resins and useful for imparting an excellent flame resistance and other properties thereto without deteriorating properties that the thermoplastic resins originally posses... | 11/04/1997 |
| 5637192 | Endothermic spent liquor recovery process Resonant tubes of a pulse combustor are immersed in a bed of solid particles in a reaction zone to provide indirect heat from the pulsating combustion gases to the solid particles of the bed. The bed is maintained in an agitated state by a gas or vapor fl... | 06/10/1997 |
| 5575922 | Method for treating mine water using caustic soda A method for treating mine water from an underground trona ore mine comprising pumping the mine water from the mine, introducing caustic soda into the mine water, maintaining the pH of the treated mine water to between about 11.5 and about 14, separating ... | 11/19/1996 |
| 5238664 | Soda ash production Process for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste solutions of sodium carbonate and/or sodium bicarbonate, ad... | 08/24/1993 |
| 5219541 | Sodium hydroxide production with a calcium carbonate seed crystal Disclosed is a method of producing sodium hydroxide comprising the steps of: (a contacting trona ore and sodium hydroxide under conditions suitable to form sodium carbonate; (b) removing essentially all solids larger than 32 mesh from the sodium carbonate... | 06/15/1993 |
| 5219550 | Production of low boron lithium carbonate from lithium-containing brine The present invention relates to a novel process for producing, from a lithium-containing brine, a low boron lithium carbonate compound. This compound is particularly useful for conversion to a highly pure lithium chloride for the production of lithium me... | 06/15/1993 |
| 4913736 | Process for recovering platinum group metals A process for recovering Platinum Group metals from material comprising one or more Platinum Group metals and one or more Group IA metals supported on carbon comprises heating at a temperature between 700° C. and 1150° C. in a stream of an inert gas or ... | 04/03/1990 |
| 4769116 | Hydrometallurgical process for an overall recovery of the components of exhausted lead-acid batteries The invention relates to a hydrometallurgical process for the overall recovery of the components of exhausted lead-acid batteries, in a re-useable form, said components being mainly constituted by such materials as polypropylene, ebanite, PVC; by paste co... | 09/06/1988 |
| 4664893 | Method for the preparation of a bicarbonate sorbent in flue gas desulfurization A process for the dry carbonation of an alkali metal or ammonium carbonate, utilizing a low carbon dioxide-containing carbonating gas stream, and more particularly, a process for the production of a bicarbonate sorbent useful in the desulfurization of flu... | 05/12/1987 |
| 4459272 | Dry carbonation process A process for the dry carbonation of an ammonium or alkali metal carbonate containing material, or a mixture thereof, for conversion to the corresponding bicarbonate containing material comprising reacting in the solid phase an ammonium and/or alkali meta... | 07/10/1984 |
| 4225565 | Process for treating waste slags In the treating of waste slags produced in the desulfurization and/or dephosphorization of molten pig iron with alkali carbonates, the alkali is recovered by extracting said waste slags with hot water while feeding carbon dioxide gas to form an extraction... | 09/30/1980 |
