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2 006 459

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C1

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IPC

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Application

4866632/26, 1990-07-02

(22)

Actual filing date

1990-07-02

(45)

Published

1994-01-30

(72)

Inventor

Perminova M.I.Nekrasova V.B.Syrkin L.N.Ponomarev Ju.L.Kopyleva B.B.Dumma P.K.Galechko B.M.Kiriljuk A.F.Dubovich A.I.

(73)

Holder

Perminova Marina Ivanovna

METHOD OF WET-PROCESS PHOSPHORIC ACID CONCENTRATION Russian patent published in 1994 - IPC

Abstract RU 2006459 C1

FIELD: fertilizer production. SUBSTANCE: initial reagents are: wet-process phosphorus acid and additive. Additive has the following composition, % by weight: sodium salts of abietic and pimaric acids of C20-types 4-40; low-molecular C1-C3-alcohols 0,1-4; high-molecular C16-C30-alcohols 0,8-4; sodium salts of natural C14-C20-carboxylic acids- the rest. Phosphoric acid is evaporated in the presence of additive. Concentrated acid contains 58,5% by weight P2O5 and 0,13% by weight F. Consumption of steam is 2,01 t/t P2O5. EFFECT: improved method of phosphoric acid concentration. 3 cl, 2 tbl

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RU 2 006 459 C1

Authors

Perminova M.I.

Nekrasova V.B.

Syrkin L.N.

Ponomarev Ju.L.

Kopyleva B.B.

Dumma P.K.

Galechko B.M.

Kiriljuk A.F.

Dubovich A.I.

Dates

1994-01-30—Published

1990-07-02—Filed

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