4,4'-dihydroxy-diphenyl sulfone was synthesized by low-cost phenol and sulfuric acid as raw materials,using benzene as water-moving agent and the total yield of 4,4'-dihydroxy-diphenyl sulfone was 86 %.FTIR and XRD were used to characterize properties of the product.Meanwhile,the influences of reactant molar ratio and reaction temperature were also discussed,and the optimum processing conditions to prepare 4,4'-dihydroxy-diphenyl sulfone were as follows: the reaction temperature was 160 ℃ and ...