Study on preparation of potassium sulfate by extraction method
In this study,alcohols were used as extractants and industrial potassium bisulfate was used as raw materials to explore the best reaction conditions for producing superior potassium sulfate.The results showed that 2mol·L-1 potassium bisulfate solution was extracted with methanol in the volume ratio of 3∶5 for 60min at room temperature to obtain potassium sulfate solid with 93.8%product yeild 53%K2O content,less than 0.04%Cl-and 18.12%S,and methanol can be recovered by distillation.This process is simple,and there is no"three wastes"produced,and the generated potassium sulfate reaches the national excellent product standard,which can create certain economic benefits for enterprises.
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