METHOD OF PRODUCTION OF AMMONIUM SULFATE PHOSPHATE Russian patent published in 2003 - IPC

Abstract RU 2202522 C1

FIELD: production of complex fertilizers, ammonium sulfate phosphate in particular. SUBSTANCE: proposed method includes neutralization of phosphoric and sulfuric acids by ammonia, thus obtaining phospho-sulfuric pulp at pH of 4.6-5.8; phosphoric acid is first neutralized by ammonia at maintenance of pH in neutralization zone between 6.2 and 9 in presence of magnesium compounds in the amount of 7-28% relative to content of P₂O₅ in phosphoric acid. Proposed method makes it possible to obtain fertilizers both in water-soluble and citric- soluble forms. EFFECT: improved properties of fertilizers. 1 tbl, 3 ex

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RU 2 202 522 C1

Authors

Dmitrevskij B.A.

Treushchenko N.N.

Jur'Eva V.I.

Nikolenko T.V.

Rjazanova V.V.

Dates

2003-04-20—Published

2002-01-21—Filed