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2 161 123

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IPC

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Application

99114512/12, 1999-07-01

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Start date

1999-07-01

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Actual filing date

1999-07-01

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Published

2000-12-27

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Inventor

Avdeev V.V.Shkirov V.A.Martynov I.Ju.Nikol'Skaja I.V.Maksimova N.V.Sezemin V.A.Sezemin A.V.Pantjukhin M.L.Babich I.I.Sorokina N.E.

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Holder

Avdeev Viktor Vasil'Evich

METHOD OF PRODUCTION OF OXIDIZED GRAPHITE Russian patent published in 2000 - IPC

Abstract RU 2161123 C1

FIELD: chemical industry. SUBSTANCE: natural GRAPHITES is placed into well-stirred reactor and fuming HNO₃ is added in the mass ratio HNO₃ : : C_gr = 0.6 : 1. Treatment is carried out for 1-2 h, then H₂SO₄ is added (mass ratio H₂SO₄ : C_gr = (0.33-0.5) : 1) or H₃PO₄ (mass ratio H₃PO₄ : C_gr = (0.75-1.5) : 1). Treated product is washed out with water and dried at 50-100 C. Overweight of oxidized graphite is 8-33%, bulk density is 1.8-4 g/l, impurity content, wt.-%: S, up to 1.46; N, 0.011-0.412; H₃PO₄, up to 2.12. Invention can be used for production of the fireproofing materials, graphite foil. EFFECT: improved method of production. 1 tbl, 3 ex

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RU 2 161 123 C1

Authors

Avdeev V.V.

Shkirov V.A.

Martynov I.Ju.

Nikol'Skaja I.V.

Maksimova N.V.

Sezemin V.A.

Sezemin A.V.

Pantjukhin M.L.

Babich I.I.

Sorokina N.E.

Dates

2000-12-27—Published

1999-07-01—Filed