Synthesis of n-Butyl Acetate Catalyzed by SBA-16 Mesoporous Molecular Sieves Modified by Phosphotungstic Acid

n-Butyl acetate is synthesized from acetic acid and butanol with HPWA-SBA-16 as catalyst.Compared with other liquid and microporous molecular sieve catalysts,HPWA-SBA-16 has better catalytic performance in this reaction.The operating parameters of the catalyst,including effect of reaction temperature,ratio of acetic acid to butanol,reaction time and using amount of the catalyst are studied.The optimal reaction conditions are as follows :temperature 120 ℃,ratio of acetic acid to butanol1∶2.5,the weight percentage of catalyst 4%,reaction time 3 h.The HPWA-SBA-16 catalyst has good reusability.