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Method of production of sulfuric acid by means of the alkali metal sulphates and bisulfates of industrial or contained in natural rocks of complex composition (alunite, etc.) with the production of alkalis caustic or alkali metal salts, of aluminum sulphate, or of alumina, purified
Method of production of sulfuric acid by means of the alkali metal sulphates and bisulfates of industrial or contained in natural rocks of complex composition (alunite, etc.) with the production of alkalis caustic or alkali metal salts, of aluminum sulphate, or of alumina, purified