METHOD FOR PRODUCTION OF DIAMMONIUM PHOSPHATE Russian patent published in 2007 - IPC C05B7/00 C01B25/28

Abstract RU 2296729 C1

FIELD: agriculture, fertilizers.

SUBSTANCE: claimed method includes one-step neutralization of liquid and gas ammonia in ratio of 1:(0.25-3.0) with acidic solution having molar ratio of NH₃:H₃PO₄ = 0.5-0.7 up to molar ratio in product of NH₃:H₃PO₄ = 1.65-1.82, followed by product granulation and drying in single apparatus and purification of exhaust gases. Claimed ratio of liquid and gas ammonia makes it possible to control granulation process and to use reaction heat for product drying. Yield of commercial fraction (namely 2-4 mm) is 90-92 %.

EFFECT: simplified one-step process with increased yield.

5 ex, 1 dwg

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RU 2 296 729 C1

Authors

Dastikas Jonas

Gokas Rimantas

Rakauskas Aleksandr

Staninas Vladas

Monkelis Darjus

Dates

2007-04-10—Published

2005-07-15—Filed