▎ 摘　　要

NOVELTY - The utility model claims an industrial device for preparing graphene oxide by one-step method under low temperature condition, comprising an oxidation reaction kettle, a settling tank, a pickling settling tank, a water washing membrane filtering system, a freezing drying tank, a hydrochloric acid boiling recovery tower, a manganese recycling system, sulphuric acid boiling recovery tower and temperature control system; after finishing the oxidation reaction, processing the material by settling tank and pickling settling tank; at the same time, recycling sulphuric acid and hydrochloric acid by sulphuric acid boiling recovery tower and hydrochloric acid boiling recovery tower; at last, washing by water washing membrane filter system to neutral, then drying by freezing drying box to obtain sponge-shaped graphene oxide with high quality. The utility model realizes scale low temperature one-step preparation of high quality graphene oxide; In addition, the sulphuric acid boiling recovery tower, hydrochloric acid boiling recovery tower and manganese recovery system respectively recycling concentrated sulphuric acid and hydrochloric acid and manganese, realizing the reaction by-product recovery and reuse, avoiding the environment pollution.