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| Number | Title | Issue Date |
| 4069299 | Hydroxy-aluminum chloride and sulfate polymer production Hydroxy-aluminum chloride or sulfate polymer is produced by reacting urea and aluminum chloride or aluminum sulfate in aqueous solution. The hydroxy-aluminum chloride and sulfate polymers are useful for consolidating soil in secondary oil recovery and for... | 01/17/1978 |
| 4039615 | Production of aluminum sulfate Hexagonal plate crystals of aluminum sulfate are produced in chemically pure form by a process which comprises cooling a heated saturated solution of chemically impure aluminum sulfate acidified with sulfuric acid to precipitate crystals of aluminum sulfa... | 08/02/1977 |
| 4024087 | Method of preparing coagulant for purification of water from mechanical admixtures The method of preparing a coagulant for purification of water from mechanical admixtures consists in that alunite is roasted at a temperature of 520°-620° C. The roasted alunite is leached with a 20-35 per cent aqueous solution of sulphuric acid taken i... | 05/17/1977 |
| 3984312 | Process for insolubilizing potentially water pollutable wastes from sodium or ammonium type sulfur dioxide air pollution control systems Process for insolubilizing water soluble wastes from alkaline sodium or ammonium type sulfur dioxide control systems used in conjunction with industrial or power plants. The sodium or ammonium sulfite or sulfate wastes are reacted in solution with ferric ... | 10/05/1976 |
| 3983212 | Alumina production A method of producing an alumina bearing product in which the alumina is substantially soluble in cold alkali including the steps of contacting an aluminium bearing material with concentrated sulphuric acid containing 30 to 100 weight percent sulphuric ac... | 09/28/1976 |
| 3953306 | Metal recovery from waste treatment sludges An improved process for preparing highly concentrated salt solutions of metals of high purity from waste metal sludges at superior dissolution rates is achieved by preparing, concentrating and washing the sludge containing insoluble metal hydroxide under ... | 04/27/1976 |
| 3949684 | Method for oxidation of sulfur-containing substances A method for reducing the sulfur oxide content of a gaseous effluent resulting from the oxidation of sulfur-containing materials, such as fuels, which method provides for oxidation of such materials in a fluidized bed reactor in the presence of one or mor... | 04/13/1976 |
