▎ 摘　　要

NOVELTY - Production of graphene involves providing (11) a carbon material, processing (12) rolling procedure by pressing (121) the carbon material to disperse and crush the carbon material into a crushed carbon material, forming (122) solution (s1) by mixing the crushed carbon material and solvent, processing a ultrasound procedure (13) by ultrasonically processing solution (s1) (131), obtaining solution (s2) (132) after ultrasonically processing, and obtaining a solution containing graphene (14) from an upper liquid of solution (s2) after ultrasonically processing. USE - Production of graphene (claimed). ADVANTAGE - The method enables simple, economical and environmentally-friendly production of graphene with excellent graphene yield and reduced particle sizes of graphene products e.g. 30-50 nm. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart explaining the production of graphene. Step of providing carbon material (11) Step of rolling procedure (12) Step of ultrasonically processing (13) Step of obtaining graphene solution (14) Step of pressing carbon material (121) Step of forming solution (122) Step of ultrasonically processing solution (131) Step of obtaining solution after ultrasonically processing (132)