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Manufacture Of Sulfuric Acid And White Cement From Gypsum

Patent US2528103 sulfuric acid and hydraulic cement from gypsum The mixture of sulphuric acid clay and gypsum is withdrawn through a pipe 66 leading to a filter 61White cement and grey cement have been made in which the SO content was reduced to below one percent in fact this1916 Lucien Paul Basset

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