FIELD: potassium monophosphate production.
SUBSTANCE: invention relates to a method for producing potassium monophosphate. Phosphoric acid is neutralized with potassium carbonate to obtain a solution containing potassium monophosphate and crystallization of potassium monophosphate. As a source of phosphoric acid to obtain a solution of potassium monophosphate, a nitric phosphoric acid solution obtained by decomposition of apatite with nitric acid is used, and the precipitate formed during the neutralization of the nitric phosphoric acid solution is returned to the stage of decomposition of apatite with nitric acid. The method is carried out in the absence of production waste in the form of a precipitate during the neutralization of a nitric phosphoric acid solution containing phosphoric acid, nitric acid and calcium nitrate with potassium carbonate.
EFFECT: improvement of method for producing potassium monophosphate.
1 cl, 3 ex
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