METHOD FOR PREPARATION OF COMPLEX FERTILISER ON AMMONIUM NITRATE BASE Russian patent published in 2009 - IPC C05C1/00 C05G1/00 

FIELD: chemistry.

SUBSTANCE: invention refers to the preparation of the complex fertiliser on ammonium nitrate base containing besides nitrogen other elements - phosphorus, potassium and sulphur and can be used in chemical industry in mineral fertilisers production. The essence of the method lies in mixing of ammonium nitrate with reagents containing other nutrients (phosphorus, potassium, sulphur) and following granulation of the target product. The mixture of ammonium nitrate and acid phosphorus-containing reagent is neutralised with ammonia in the presence of the sulphur-containing reagent, then evaporated forming the evaporatedpulp. The water solution of ammonium nitrate is divided into two parts, one of them is mixed with acid phosphorus-containing reagent and the other part - with pulp described above with simultaneous adding of the potassium-containing reagent and following granulation of the obtained mixed pulp in the drum granulator-dryer.

EFFECT: present method allows to enhance the assortment of the produced fertilisers.

7 cl, 2 ex