Catalytic Application of H₃PW₆Mo₆O₄₀/SiO₂ in Synthesis of Acetals and Ketals

Abstract:

A novel catalyst, H₃PW₆Mo₆O₄₀/SiO₂ was prepared by a sol-gel technique and its catalytic application in synthesis of acetals and ketals were tested. The preparation conditions of catalyst were optimised by using the orthogonal experimental design. The optimum conditions are: the mass ratio of H3PW6Mo6O40 to SiO₂ is 0.4, calcination temperature is 150 °C and calcination time is 3 h. The steric properties of the reactants play an important role in the acetalization. The catalytic activity of the catalyst decreases when the size of the reactant increased. Although a decrease in catalytic activity was observed with its subsequent reuse, the catalyst could be reused at least four times without any other treatments. The results reveal that the H₃PW₆Mo₆O₄₀/SiO₂ catalysis generally results in good yields of acetals and ketals under mild reaction conditions.

• Periodical: Advanced Materials Research (Volume 531)
• Pages: 304-307
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.531.304
• Online since: June 2012
• Authors: Yong Kui Huang, Li Yu, Guo Bin Duan, Yun Zhi Wang, Ming Bo Xu, Shui Jin Yang
• Keywords: Acetal, Catalysis, H₃PW₆Mo₆O₄₀, Ketal, SiO₂

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