FIELD: inorganic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for producing potassium sulfate from the raw containing potash and sodium sulfate that involves the following stages: (a) treatment of portion of potash-containing raw and comprising sodium sulfate to provide crystallizing out of glaserite from solution to the sedimentation potassium sulfate in the second mother liquor; (c) recovery of the second mother liquor to the portion of raw containing potash and sodium sulfate; (d) crystallization of the first mother liquor by evaporation for producing sodium chloride in the third mother liquor; (e) recovery of the third mother liquor to the portion of raw containing potash and sodium sulfate. Invention provides reducing consumptions and to obtain potassium sulfate free of insoluble substances.
EFFECT: improved producing method.
17 cl, 5 dwg, 1 tbl
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