▎ 摘　　要

NOVELTY - A method of producing graphene involves processing crystalline graphite with a solution of ammonium persulfate in sulfuric acid not containing free water, aging the obtained intercalated compound of graphite prior to expansion, dispersing the expanded compound of graphite ultrasonically or using other device which creates cavitation in liquid, hydrolyzing, and washing with water. USE - Method of obtaining graphene (claimed).