COMPLEX FERTILIZER PRODUCTION PROCESS Russian patent published in 2002 - IPC

Abstract RU 2188182 C2

FIELD: fertilizer production. SUBSTANCE: granulated complex fertilizers are manufactured by decomposing phosphate feedstock with nitric acid followed by isolation of potassium nitrate from nitric acid extract, ammonization of nitric acid extract, evaporation, nixing melt with potassium salts, and granulation conducted in presence of pigments (iron minimum or ochre). Pigment is added to potassium salts, recycle, or melt in amounts between 0.2 and 2.0% of the weight of finished product. EFFECT: reduced (up to 3 times) blocking property of granulated nitrogen-phosphorus-potassium fertilizer and increased (by 10-20%) strength of granules. 3 cl, 1 tbl

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RU 2 188 182 C2

Authors

Korjakov V.V.

Kuznetsov A.G.

Bogunov S.I.

Poljakova O.A.

Solov'Ev B.A.

Kozyrev A.B.

Dates

2002-08-27—Published

2000-10-03—Filed