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2 118 941

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IPC

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Application

97106257/25, 1997-04-16

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Actual filing date

1997-04-16

(45)

Published

1998-09-20

(72)

Inventor

Avdeev V.V.Babich I.I.Denisov A.K.Sezemin V.A.Loginov N.D.Shkirov V.A.Ionov S.G.Nikol'Skaja I.V.Monjakina L.A.Martynov I.Ju.Sorokina N.E.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju

METHOD OF PRODUCTION OF OXIDIZED GRAPHITE Russian patent published in 1998 - IPC

Abstract RU 2118941 C1

FIELD: technology of carbon-graphite materials. SUBSTANCE: to natural graphite fuming HNO₃ (mass ratio of HNO₃ : graphite = (0.37-0.75):1) or a mixture consisting of 2-4 mas. p. p. fuming and 1 p. 58% HNO₃ (mass ratio mixture : graphite = (0.75-2.2):1) is added. It is possible to add preliminary 0.025 mas. p. urea/1 mas. p. graphite. Evolved gases are removed continuously. Hydrolysis and washing out are carried out at water feeding by countercurrent method to compound that is incorporated in graphite. Stirring is carried out by pulsating method. Mass ratio water : compound to be incorporated in graphite = (5-7):1. Drying the oxidized graphite is carried out at 80 C and below. Expansion degree of oxidized graphite is 230-500. Invention can be used for production of cellular graphite and graphite foil. EFFECT: improved method of production, decreased consumption of acid and acid effluence. 3 cl, 1 tbl, 2 ex

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RU 2 118 941 C1

Authors

Avdeev V.V.

Babich I.I.

Denisov A.K.

Sezemin V.A.

Loginov N.D.

Shkirov V.A.

Ionov S.G.

Nikol'Skaja I.V.

Monjakina L.A.

Martynov I.Ju.

Sorokina N.E.

Dates

1998-09-20—Published

1997-04-16—Filed