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method for ueberfuehrung of calcium sulphate in potassium sulphate by ion exchange
method for ueberfuehrung of calcium sulphate in potassium sulphate by ion exchange
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机译:离子交换法制取硫酸钾中硫酸钙的方法
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摘要
Gypsum as a byproduct in the manufacture of phosphoric acid is converted into potassium sulphate or sodium sulphate by subjecting an aqueous slurry to anion exchange under acidic conditions. Adding solid potassium chloride to the obtained solution of potassium sulphate causes the latter to crystallize in pure state, the potassium chloride solution recovered after filtering off the crystallized potassium sulphate being used for the regeneration of the anion exchanger.
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