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2 107 053

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C1

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IPC

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Application

97103027/25, 1997-02-25

(22)

Actual filing date

1997-02-25

(45)

Published

1998-03-20

(72)

Inventor

Treushchenko N.N.Dmitrevskij B.A.Filimonov A.A.Dremov A.V.Jur'Eva V.I.Kostjuzheva M.G.Shvetsov O.V.

(73)

Holder

Zakrytoe Aktsionernoe ObshchestvoAktsionernoe Obshchestvo Otkrytogo Tipa

METHOD OF PRODUCING GRANULATED AMMONIATED SUPERPHOSPHATE Russian patent published in 1998 - IPC

Abstract RU 2107053 C1

FIELD: mineral fertilizers. SUBSTANCE: granulated ammoniated superphosphate is prepared by decomposing dolomitized phosphate material by sulfuric acid, neutralizing slurry by remaining part of phosphate material, and granulating and drying final product. Method is distinguished by conducting slurry neutralization operation in two steps: first by phosphate material at pH 2-2.5 and then by ammonia-containing regent to pH 2.8-3.5. EFFECT: enhanced process efficiency. 1 tbl

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RU 2 107 053 C1

Authors

Treushchenko N.N.

Dmitrevskij B.A.

Filimonov A.A.

Dremov A.V.

Jur'Eva V.I.

Kostjuzheva M.G.

Shvetsov O.V.

Dates

1998-03-20—Published

1997-02-25—Filed

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