METHOD OF POTASSIUM-AMMONIUM-PHOSPHATE SOLUTION PRODUCING Russian patent published in 1998 - IPC

FIELD: microbiological industry. SUBSTANCE: method involves the use of ammonium phosphate, phosphoric acid and potassium hydroxide as parent reagents for producing the end product exhibiting pH 6-8. Phosphoric acid is ammonized partially with gaseous ammonia at 200-270 C. The obtained ammonium phosphate melt has 10% P₂O₅, not above, as polyphosphates at pH 2-4. The obtained product is dissolved in potassium hydroxide an aqueous solution taken at amount providing mass ratio P₂O₅ : K₂O = 1.2-3.2 in the end product. Method is used for production of nutrient salts for microbiological industry. EFFECT: improved method of producing. 2 cl, 3 tbl