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1 774 669

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A1

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IPC

(21) (22)

Application

4854728/26, 1990-07-27

(22)

Actual filing date

1990-07-27

(45)

Published

1995-10-27

(72)

Inventor

Lavrov A.V.Moskvin L.N.Krivobokov V.V.Andrianov A.K.

METHOD OF HEAT-TRANSFER SURFACE CLEANSING Russian patent published in 1995 - IPC

Abstract SU 1774669 A1

FIELD: chemical technology. SUBSTANCE: method involves treatment at 30-80 C in solution containing 2-10 g glycine and 1-3 g/l sodium nitrite. Simultaneously, dissolved copper is removed by regeneration of spent solution by passing through ion-exchange filter filled with cation-exchange resin КУ-2 in the form of 1,2-ethanediamine. Filtrate is used for repeated treatment. EFFECT: improved method of cleansing. 6 tbl

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SU 1 774 669 A1

Authors

Lavrov A.V.

Moskvin L.N.

Krivobokov V.V.

Andrianov A.K.

Dates

1995-10-27—Published

1990-07-27—Filed

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