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2 089 495

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IPC

(21) (22)

Application

96103543/25, 1996-02-22

(22)

Actual filing date

1996-02-22

(45)

Published

1997-09-10

(72)

Inventor

Avdeev V.V.Martynov I.Ju.Nikol'Skaja I.V.Monjakina L.A.Denisov A.K.Loginov N.D.Sezemin V.A.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa

METHOD OF PRODUCING THE OXIDIZED GRAPHITE Russian patent published in 1997 - IPC

Abstract RU 2089495 C1

FIELD: chemical technology. SUBSTANCE: graphite powder is treated with oxidizing solution based on concentrated H₂SO₄ and NH₄NO₃ at consumption of NH₄NO₃ 0.046-0.137 g/1 g graphite. Graphite bisulfate is separated from oxidizing solution excess up to its content less 1.5 g/1 g graphite, hydrolyzed, washed and dried. The obtained graphite bisulfate exhibits I-III grades. Properties: foam graphite expansion degree after thermic treatment of the oxidized graphite-III is 900, filled density is 1.1-9.0 g/l. Method is used for making flexible graphite foil and composition materials. EFFECT: improved method of producing. 1 tbl

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RU 2 089 495 C1

Authors

Avdeev V.V.

Martynov I.Ju.

Nikol'Skaja I.V.

Monjakina L.A.

Denisov A.K.

Loginov N.D.

Sezemin V.A.

Dates

1997-09-10—Published

1996-02-22—Filed