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A process for the recovery of alumina by conversion of the alumina content of a substance containing alumina and silica in soluble alkali metal aluminate and of the kieselsaeuregehaltes in insoluble calcium silicate
A process for the recovery of alumina by conversion of the alumina content of a substance containing alumina and silica in soluble alkali metal aluminate and of the kieselsaeuregehaltes in insoluble calcium silicate
