▎ 摘　　要

NOVELTY - The apparatus comprises a circulation part in which a cleaning solution is directly supplied to a catalyst metal of a graphene sheet along a direction that is parallel to a transferring direction of an auxiliary tank. The auxiliary tank passes the cleaning solution to a water treatment tank. A mixing unit is configured for stirring the catalyst metal with the cleaning solution, and is arranged in an upper portion of a transport unit of the water treatment tank. The transport unit transfers the catalyst metal in the sheet along one-way direction. USE - The apparatus is useful for removing a metal catalyst such as copper from a graphene sheet (claimed). ADVANTAGE - The apparatus evenly removes the metal catalyst from the graphene sheet without any damage. DETAILED DESCRIPTION - The apparatus comprises a circulation part in which a cleaning solution is directly supplied to a catalyst metal of a graphene sheet along a direction that is parallel to a transferring direction of an auxiliary tank. The auxiliary tank passes the cleaning solution to a water treatment tank. A mixing unit is configured for stirring the catalyst metal with the cleaning solution, and is arranged in an upper portion of a transport unit of the water treatment tank. The transport unit transfers the catalyst metal in the sheet along one-way direction. The cleaning solution removes the catalyst metal from the sheet in the water treatment tank. A pump is configured for transporting the cleaning solution to an exhausting part under pressure. The exhausting part ejects the cleaning solution to the auxiliary tank, and is connected with a circulating pipe. A supply unit transfers the cleaning solution to an auxiliary tank via the circulating pipe. The exhausting part is arranged in a lower part of the transport unit. The cleaning solution is stirred using an agitating blade of the mixing unit. The water treatment tank is arranged in an upper portion of the auxiliary tank. The apparatus further comprises an extraction part for segregating the catalyst metal where the auxiliary tank is removed. The graphene sheet is a roll type sheet.