▎ 摘　　要

NOVELTY - The method for purifying graphene involves mixing graphite material with strong acid and strong oxidant solution fully, inserting oxygen-containing functional group between layers of graphite, and performing ultrasonic stripping to obtain oxidized graphene. The oxidizing graphene solution is washed and filtered, and the cleaned solid is dried at low temperature to obtain graphene oxide powder. The graphene oxide is heated in the circulation heating device, and the air in the circulating heating device is extracted to form a vacuum. The inert gas is added into the circulation heater device, and the graphene oxide is rapidly heated in the recyclable heating device, to obtain pure graphene. The hot air circulation is recycled by heating the heated inert gas after circulating heat exchange to heat the graphite. USE - Energy-saving and recyclable graphene purification processing method for use in materialization, micro-nano processing, energy sources, biomedicine and drug delivery applications. ADVANTAGE - The method recycles the hot air in the process of the graphene purification, it is used for heating the graphite raw material, it improves the early reaction speed and reduces the energy consumption and waste. At the same time, the method uses microwave heating to effectively remove impurities. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of positional relationship of energy-saving and recyclable graphene purification processing system. 1Heating box main portion 4Control panel 5Emptying pipe 7Inflation tube 9Exhaust pipe