The Preparation of Phosphotungstic Acid with Dawson Structure and Their Catalytic Performance on Synthesis of n-Butyl Acetate

Phosphotungstics acid with Dawson structure and characted by FT-IR,UV-Vis and TG-DSC.The catalytic performance in synthesis of n-Butyl acetate with acetic acid and n-butanol was investigated and the mechanism was discussed.The optimized condition were as follows: the mass ratio of the catalyst to total reactant was 0.72%,the molar ratio of n-butyl alcohol to acetic acid was 2.0︰1.0,the reaction time was 2.0 h,the reaction temperature was 125 ℃.Yield of n-Butyl acetat could reach 96.83% under the optimum conditions.