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(11)

1 727 338

(13)

A1

(51)

IPC

(21) (22)

Application

4471141/26, 1988-07-01

(22)

Actual filing date

1988-07-01

(45)

Published

1995-08-27

(72)

Inventor

Pustovalov Ju.P.Maslov V.A.

METHOD FOR PRODUCTION OF EXPANDED GRAPHITE Russian patent published in 1995 - IPC

Abstract SU 1727338 A1

FIELD: production of carbon and graphite materials. SUBSTANCE: method involves interaction of graphite disperse material with oxidizing mixture, dilution products of said reaction 2.5-10 fold by water, sustaining within 0.5-10 h, washing and drying. Then heat treatment of material is carried out to expand it. Concentrated sulfuric acid and oxidizing agent (e.g. potassium bichromate) are used as mentioned above oxidizing mixture. EFFECT: decreases ash content of expanded graphite. 2 cl, 1 tbl

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SU 1 727 338 A1

Authors

Pustovalov Ju.P.

Maslov V.A.

Dates

1995-08-27—Published

1988-07-01—Filed

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