▎ 摘　　要

NOVELTY - The utility model claims a cooling device for preparing terephthalic acid by oxidizing paraxylene, comprising rectangular radiating box, radiating fin is set on the outer side of the box body of the radiating box, the radiating fin comprises aluminium plate, aluminium plate whose two sides are respectively coated with graphene coating; the radiating tank is provided with a cooling liquid inlet pipe and cooling liquid outlet pipe; the same side of the cooling liquid inlet pipe and liquid outlet pipe are set in the radiating box; this utility model adopts said technical solution, high heat exchange efficiency, simple structure and low manufacturing cost.