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Dissolution of aluminous minerals by acids either in aqueous solution
Treatment of solutions to recover pure aluminum compounds
Recovery of acid radical and utilization of undissolved residues
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acid processes alkali Alumina extracted aluminous minerals aluminum chloride aluminum hydroxide aluminum nitrate aluminum oxide aluminum sulphate solutions alunite ammonium sulphate basic aluminum sulphate bauxite Bayer process British patent calcined calcium carbonate cent acid cent purification cent sulphur Chem chemical colloid concentration decomposed decomposition dissolubility dissolved effect evaporation extraction of alumina feldspar ferric iron ferrocyanide ferrous filtered filtration flocculation footnote gases grams heating hydrochloric acid impurities iron from aluminum Jour kaolin kaolinite leached leucite lone high-iron clay method Milbauer and Skutil mixture neutral obtained odor on opening operation Percentage extraction Phonolite potash alum potassium sulphate precipitate Prussian blue purification of aluminum raw material reaction reagent removal of iron residue retort roasted clays salts samples silica sodium solu soluble sulphide sulphur dioxide sulphuric acid sulphurous acid solution tion treated treatment trioxide tubes United States patent water of crystallization yield of alumina