FIELD: agriculture.
SUBSTANCE: inventions relate to agriculture. Method of producing calcium dihydrophosphate and/or calcium hydrophosphate is characterized by acid and/or medium phosphates of sodium, or potassium, or ammonium in form of an aqueous solution with concentration of 1 wt. % to concentration corresponding to obtaining a solution saturated at 0–100 °C, are mixed with solution of calcium nitrate or chloride with concentration of 1 wt. % to concentration corresponding to obtaining solution saturated at 0–100 °C, reaction to obtain calcium dihydrophosphate or calcium hydrophosphate is carried out at temperature of 0–100 °C, after completion of reaction precipitate of calcium dihydrophosphate and/or calcium hydrophosphate is separated by filtration, washed and dried, and nitrates or sodium, potassium or ammonium nitrates are extracted from obtained filtrate.
EFFECT: invention enables to obtain high-quality products without production wastes and additional costs.
6 cl, 2 ex
