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2 107 055

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IPC

(21) (22)

Application

97103028/25, 1997-02-25

(22)

Actual filing date

1997-02-25

(45)

Published

1998-03-20

(72)

Inventor

Dmitrevskij B.A.Treushchenko N.N.Filimonov A.A.Dremov A.V.Jur'Eva V.I.Nifontova T.K.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

METHOD OF PRODUCING COMPOUND FERTILIZERS Russian patent published in 1998 - IPC

Abstract RU 2107055 C1

FIELD: mineral fertilizers. SUBSTANCE: method includes neutralization of phosphoric and sulfuric acids by potassium-containing alkaline reagent and ammonia, granulation, and drying of final product. Neutralization is carried out in two steps: first, phosphoric acid is neutralized by potassium- containing alkaline reagent at pH 3.5-7.2 and then sulfuric acid is neutralized by ammonia in presence of potassium phosphates at pH 3.8- 5.3. fertilizer is characterized by good hygroscopic properties and wide range of nutritive components' ratios. EFFECT: improved product's quality. 1 tbl

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RU 2 107 055 C1

Authors

Dmitrevskij B.A.

Treushchenko N.N.

Filimonov A.A.

Dremov A.V.

Jur'Eva V.I.

Nifontova T.K.

Dates

1998-03-20—Published

1997-02-25—Filed