▎ 摘　　要

NOVELTY - The method involves taking the mixed reaction solution with a volume of V0. Concentrated sulfuric acid is added to the mixture solution. The mass concentration of the sulphuric acid required is adjusted in the mixed solution to the required range according to the C2 value and the expansion graphite preparation. Mass of potassium permanganate is calculated in the mixing reaction solution according to V3, V4 and related calculation parameters. Graphite of the raw material is added to the mixing solution to prepare graphite M9. The graphite raw material of the material M9 is added to the mixed reactor solution for reacting to obtain an expanded graphite. USE - Method for using mixed reaction liquid of oxidized graphite and alkene to prepare graphite used in graphene strong oxidant. ADVANTAGE - The method recycles the strong acid in the process of oxidizing graphene graphene strong oxidant, which is used for the preparation of the graphite, the recycling process does not need to purify and impurity treatment and can realize the direct recycling of strong acid and strong oxidizer, reducing the discharge of the acid and oxidant. It can reduce the industrial preparation cost of the oxidized graphene and graphite the two graphite of the deep processing product. It is widely applied to the low-cost industrial production of the oxidation graphene and the expansion graphite.