Tetrachlorophthalic anhydride was synthesized with phthalic anhydride as raw material, compounded iodine as catalyst by direct separation of crystal from solvent on the basis of solvent method.

• 在溶剂法基础上,以苯酐为原料,复合碘作催化剂,产品直接结晶分离的方法合成四氯邻苯二甲酸酐。