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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
SU4471141/26A1988-07-011988-07-01Method for production of expanded graphite
SU1727338A1
(en)