▎ 摘　　要

NOVELTY - The utility model claims a graphite heat conducting film for preparing oxidized graphene multi-stage filter device, comprising a liquid inlet pipe, washing the cation exchange column, an anion exchange column, one side of the box is provided with the liquid inlet pipe; the liquid inlet pipe is connected by a flange on the chest, under the washing tank is provided with a stirring motor, the stirring motor through bolt is connected with the washing, the washing the other side provided with the cation exchange column, the cation exchange column is set at one side of the anion exchange column. one side of the anion exchange column provided with a purifying box. The beneficial effects are as follows: the structure is reasonable, the operation is simple, the use is convenient, by stirring and mixing the initial solution, improve the reaction efficiency, the use of a multistage filter, improve the purity of graphene oxide filter.