FIELD: agriculture.
SUBSTANCE: method for obtaining potassium sulfate (hereinafter – PS), suitable as a mineral fertilizer, is characterized by: dissolving carnallite containing 5% NaCl in water to obtain sylvinite and a salt solution containing magnesium chloride; adding sodium sulfate to carnallite to obtain a mixture of kainite or leonite, a precipitate of KCl and NaCl and a salt solution containing MgCl2, KCl, NaCl; separating NaCl from the mixture; obtaining a precipitated mixture of kainite or leonite with KCl; filtering the specified mixture of kainite or leonite with KCl and washing with water to obtain a pure mixture of kainite or leonite with KCl; additional adding KCl to a mixture of kainite or leonite with KCl, followed by decomposing the specified mixture of kainite or leonite with KCl to PS.
EFFECT: invention makes it possible to obtain a harmless fertilizer – potassium sulfate.
7 cl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR TREATING WASTES RESULTING FROM PROCESSING CRUDE POTASSIUM SALTS AND CONSTITUTED, PREDOMINANTLY, BY SODIUM SULFATES | 1994 |
|
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| METHOD OF ARTIFICIAL CARNALLITE PRODUCING | 1989 |
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