METHOD OF OBTAINING NITROGEN-PHOSPHATE COMPOUND FERTILISER Russian patent published in 2010 - IPC C05B7/00 C05B1/00 

FIELD: chemistry.

SUBSTANCE: method involves ammonation of a mixture of a phosphorus-containing component with ammonium nitrate, evaporation and granulation of the obtained mixture followed by treatment of the granules with an anti-caking substance. The phosphorus-containing component is a clear ammonium phosphate solution with concentration of 16-30% in terms of P₂O₅, obtained through ammonation of wet-process phosphoric acid to pH 2.2-3.0 and then separation of the precipitate.

EFFECT: invention enables to obtain nitrogen-phosphate fertiliser using existing ammonium nitrate production equipment and protection of equipment and pipes from corrosion and clogging up of equipment and communication.

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