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2 108 286

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IPC

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Application

97104191/25, 1997-03-18

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Actual filing date

1997-03-18

(45)

Published

1998-04-10

(72)

Inventor

Belugin V.A.Brigutsa V.I.Kaljakin S.G.Kochetkov S.P.Mironov V.E.Perevalov Ju.D.Tsybul'Nik A.V.Sharypin V.I.Jarkin A.N.

(73)

Holder

Kaljakin Sergej GeorgievichMironov Vladimir Evgen'Evich

METHOD OF PRODUCING HIGH-CONCENTRATION PHOSPHORIC ACID Russian patent published in 1998 - IPC

Abstract RU 2108286 C1

FIELD: phosphoric acid production. SUBSTANCE: extraction phosphoric acid, destined for production of industrial, feed, and food phosphates, is purified, clarified, and concentrated by evaporation. The latter operation is conducted simultaneously with finally removing volatile impurities by way of creating turbulized film flow of acid over heated to 120-800 C surface for 5 to 25 s. The surface can be heated either by steam or by electricity. EFFECT: achieved production of high- concentration food-quality acid with high technicoeconomic characteristics. 3 cl

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RU 2 108 286 C1

Authors

Belugin V.A.

Brigutsa V.I.

Kaljakin S.G.

Kochetkov S.P.

Mironov V.E.

Perevalov Ju.D.

Tsybul'Nik A.V.

Sharypin V.I.

Jarkin A.N.

Dates

1998-04-10—Published

1997-03-18—Filed