▎ 摘　　要

NOVELTY - Preparing oxidized graphite alkene comprises taking the raw material graphite, adding concentrated sulfuric acid and potassium permanganate, reacting at low temperature, collecting, filtering and washing to obtain graphene oxide dispersion liquid product. USE - The method is useful for preparing oxidized graphite alkene. ADVANTAGE - The device improves the reaction efficiency and production safety. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for device comprising a mixer, a micro-channel reactor, a collecting tank, and a cross-flow filtration device, which are connected in order.