▎ 摘　　要

NOVELTY - Macro-preparation of graphene involves adding graphite flakes and stripping liquid into the kettle, heating at 50-150 degrees C in pressure of 1-3 atmosphere, stirring at 1000-2000 rpm for 3-6 hours, discharging upper suspension through discharge port to storage tank, standing for more than 24 hours to obtain initial product, passing graphene suspension to the centrifuge, centrifuging at 1000-6000 rpm for 10 minutes-2 hours, filtering clear liquid in vacuum filter, washing filter cake with distilled water and drying in a freeze-dryer for more than 3 hours. USE - Macro-preparation of graphene (claimed). ADVANTAGE - The method prevents corrosion of equipment and does not damage the graphene structure during stripping. DETAILED DESCRIPTION - Macro-preparation of graphene involves (a) adding graphite flakes and stripping liquid into the kettle body having a stirrer according to the weight ratio of 1:2-10, stirring to obtain evenly mixed mixture in which the stripping liquid comprises 100 pts. wt. water and 1-10 pts. wt. naphthalenesulfonate, (b) heating the kettle at 50-150 degrees C in a pressure of 1-3 atmosphere, stirring with a stirrer at 1000-2000 rpm for 3-6 hours, (c) discharging the upper suspension through discharge port to the storage tank after stopping the reaction, standing still for more than 24 hours to obtain initial product, (d) passing graphene suspension in storage tank to centrifuge, centrifuging at 1000-6000 rpm for 10 minutes-2 hours, taking supernatant, filtering in vacuum filter to obtain a filter cake and (e) washing the filter cake with preset amount of distilled water and drying in a freeze-dryer for more than 3 hours.