Synthesis of Sec-Butylacetate Catalyzed by 12-Tungst Rophosphoric Acid

A high activity and long life silica-supported 12-tungst rophosphoric acid was chosen as an efficient catalyst for the synthesis of sec-butylacetate.The effects of the synthesis conditions including molar ratio of 1-butene to acetic acid,reaction pressure,reaction time,reaction temperature and amounts of the catalyst on the acetic acid conversion rate were studied in detail.The results indicated that the best conditions of synthesis of sec-butylacetate were ratio of 1-butene to acetic acid 3∶1,reaction pressure 5 MPa,reaction time 5 h,reaction temperature 120℃,amounts of catalyst 10%(acetic acid).Under above conditions,conversion rate of acetic acid was about 95%,and experimental results of gas chromatograph mass spectrometer indicated that selectivity to sec-butylacetate was 90%.The activity and selectivity of catalyst for the esterification reaction were satisfactory.