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2 090 498

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IPC

(21) (22)

Application

96103479/25, 1996-02-22

(22)

Actual filing date

1996-02-22

(45)

Published

1997-09-20

(72)

Inventor

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

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa

METHOD OF PREPARING OXIDIZED GRAPHITE Russian patent published in 1997 - IPC

Abstract RU 2090498 C1

FIELD: heat, aeronautical and atomic power engineering, and chemical and metallurgical industries. SUBSTANCE: natural graphite powder is treated with oxidizing mixture based on nitric acid production blend containing, wt. -%: H₂SO₄, 7.5-5;3.5 H₂O, 3.5; and HNO₃, the balance; and sulfuric acid monohydrate at blend to H₂SO₄ weight ratio of 1:2.3 in terms of anhydrous acids. hydrolysis and washing with water are carried out till pH of wash water is adjusted to 2-3 and oxidized graphite is produced which contains less than 2.0 wt % corrosion S. S content in cellular graphite is not more than 0.11 wt %, bulk density of cellular graphite is 2.5-5.0 g/l. EFFECT: more efficient preparation method. 2 cl, 1 tbl

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RU 2 090 498 C1

Authors

Avdeev V.V.

Voronkina A.V.

Martynov I.Ju.

Sorokina N.E.

Nikol'Skaja I.V.

Monjakina L.A.

Denisov A.K.

Loginov N.D.

Sezemin V.A.

Dates

1997-09-20—Published

1996-02-22—Filed