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Vol. 25 No. 2 (2013): Vol 25 Issue 2

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Ultrasound Assisted Heteropoly Acid Catalyst SiW12/SiO2 for Synthesis of Benzyl Acetate

https://doi.org/10.14233/ajchem.2013.11621
Xi Chen
Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing 210009, Jiangsu, P.R. China
Jun Wang
Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing 210009, Jiangsu, P.R. China
Yue Han
Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing 210009, Jiangsu, P.R. China
Xiao-Ping Lu
Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing 210009, Jiangsu, P.R. China
Ping-Fang Han
Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing 210009, Jiangsu, P.R. China

Corresponding Author(s) : Xiao-Ping Lu

chenxi198408@163.com

Asian Journal of Chemistry, Vol. 25 No. 2 (2013): Vol 25 Issue 2

Abstract

Under ultrasonic radiation, benzyl acetate is synthesized from benzyl alcohol and glacial acetic acid in presence of catalyst SiW12/SiO2. The catalyst was prepared and characterized by IR, X-ray diffraction and SEM in the experiment. The XRD result indicates that heteropoly acid retains the Keggin-type structure. The kinetic parameters of reaction were, respectively measured at 90, 100 and 110 ºC and the kinetic equation was built. Then, the effects of reaction temperature, the amount of catalyst, molar ratio of benzyl alcohol to glacial acetic acid and ultrasonic intensity on the esterification yield were discussed. The results showed that the optimum operating parameters for the present work when 10 kHz ultrasonic frequency and 1.0 W/cm2 ultrasonic intensity are as follows: reaction temperature: 110 ºC, use amount of catalyst: 1.5 g, molar ratio of benzyl alcohol to glacial acetic acid: 1.5; reaction time: 75 min. Under such conditions, the esterification yield of the reaction reached above 95.3 %.

Keywords

Benzyl Acetate Ultrasound Benzyl alcohol Glacial acetic acid Esterification
Chen, X., Wang, J., Han, Y., Lu, X.-P., & Han, P.-F. (2012). Ultrasound Assisted Heteropoly Acid Catalyst SiW12/SiO2 for Synthesis of Benzyl Acetate. Asian Journal of Chemistry, 25(2), 623–627. https://doi.org/10.14233/ajchem.2013.11621
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