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| Number | Title | Issue Date |
| 6652603 | Process for removing sodium sulfate from nickel hydroxide effluent streams A method for removing sodium sulfate from nickel and ammonia containing aqueous effluents. The effluents, typically from a nickel hydroxide production process, are cooled to or below 30° C. to crystallize and precipitate the sodium sulfate and dewater th... | 11/25/2003 |
| 5871551 | Process for the preparation of anhydrous sodium sulfate A process for the preparation of anhydrous sodium from a thenardite ore containing sodium sulfate comprising the steps of: crushing the thenardite ore; lixiviating the crushed ore in a first lixiviation step with water or with an exhausted solution from a... | 02/16/1999 |
| 5783280 | Rigid thermal insulation An insulation material comprising the double salt of aluminum potassium sulphate and method of producing such. Aluminum sulphate materials and potassium sulphate materials are combined to form aluminum potassium sulphate which is then dehydrated to remove... | 07/21/1998 |
| 5783084 | Process for the reclamation of process water from process wastewater generated in the battery manufacturing industry and other metals related industries A process wastewater treatment plant, and a process relating thereto, which converts process wastewater generated in battery manufacturing and the like into clean process water and sodium sulfate salt by treating the process wastewater to remove impuritie... | 07/21/1998 |
| 5437849 | Method of processing vanadium-containing residues To process vanadium-containing residues, the residues are leached in an aqueous slurry with introduction of SO2, the undissolved solids are removed. To effect a processing which is simple, economical and ecologically satisfactory, vanadium cont... | 08/01/1995 |
| 5330544 | Process and apparatus for increasing the size of ammonium sulfate crystals The average size of ammonium sulfate crystals is increased by passing undersized ammonium sulfate crystals through a multistage apparatus in which the crystals are contacted with an aqueous ammonium sulfate spray in a first heated chamber to increase the ... | 07/19/1994 |
| 5108625 | Process for removing sodium sulfate from aqueous buffer solutions Process for removing sodium sulphate from an aqueous citrate, adipate or phosphate buffer solution used for absorption of SO2 from exhaust gases, by evaporating an aqueous buffer solution at atmospheric pressure at a temperature near its boilin... | 04/28/1992 |
| 5108726 | Compacts of spray dried water soluble compounds The present invention is directed to articles of manufacture comprising solid compacts, formed at elevated pressures, from homogenous, finely divided powders of spray dried water soluble inorganic compounds. The solid compacts are characterized by their r... | 04/28/1992 |
| 4233175 | Reagent for treating flue gases and method of preparation A reagent for treating flue gases constituted by an intimate mixture, in the solid state, of a main component selected from the group comprising alkaline-earth, oxides, hydroxides, carbonates, bicarbonates, and mixtures thereof, and an additive selected f... | 11/11/1980 |
| 4196226 | Alkali metal aluminum phosphate Alkali metal aluminum phosphate granules having a calcium rich outer surface are provided which are characterized by improved flow and dusting properties as well as lower hygroscopicity without a change in leavening acid performance. The product can be us... | 04/01/1980 |
| 4195070 | Preparation of a MgCl2 solution for Nalco's MgCl2 process from MgSO4 and other MgSO4 salts A method of beneficiating a mixed salt mineral ore containing potassium and magnesium sulfates and/or their hydrates which allows the recovery of anhydrous magnesium chloride and the simultaneous recovery of commercially acceptable potassium sulfate.... | 03/25/1980 |
| 4179493 | Dehydration process Disclosed is a process for the production of partially dehydrated or anhydrous salts from higher hydrates of the same salt, utilizing solar energy. Hydrated salts which have an increasing solubility with an increase of temperature, possessing a transition... | 12/18/1979 |
| 4115518 | Gas desulphurization A desulphurization reagent comprising an intimate mixture, in the solid state, of a main component selected from the group consisting of alkaline-earth, oxides, hydroxides, carbonates, bicarbonates, and mixtures, thereof, and an additive selected from the... | 09/19/1978 |
