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公开(公告)号：US20220281750A1
公开(公告)日：2022-09-08
申请号：US17635261
申请日：2020-08-14
Inventor： Karl BUNNEY , Michael JACKSON
IPC: C01B32/215
Abstract: The present disclosure relates to a process for purifying graphitic material, in particular to achieve a high purity of >99.9% carbon (C). The process comprises a) heating a mixture of graphite and a eutectic mixture comprising two or more alkali metal hydroxides to produce a fused mass comprising the graphite and the eutectic mixture; b) leaching the fused mass with water or an aqueous solution to dissolve water-soluble impurities therein; and c) leaching the water-leached fused mass with an acidic solution to dissolve acid-soluble impurities therein, thereby producing high purity graphite.
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