Study on Preparation of S_2O_8~(2-)/ZrO_2-Ce_2O_3 Solid Superacid and Catalytic Synthesis of Butyl Acetate

A novel solid superacid S_2O~(2-)_8/ZrO_2-Ce_2O_3 was synthesized by the coprecipitation method when (NH_4) S_2O_8 acted as dipping solution.Structural characteristics of superacid were analysed with IR.The total acid number of the solid superacides synthesized by the different preparation conditions were represented with UV spectrum and their catalytic activity was evaluated when esteritication of acetic acid and butanol was a probe reaction.We found that the promoting action of S_2O~(2-)_8 is stronger than SO~(2-)_4 on the preparation area of solid superacid and when it was preparated with doping number of Ce_2O_3 1.5%, roasting temperature being 650℃, roasting time being 5h,the solid superacid has the best total acid number and catalytic activity.