| Autor: |
Yong Kui Huang, Li Yu, Guo Bin Duan, Yun Zhi Wang, Ming Bo Xu, Shui Jin Yang |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Advanced Materials Research. 531:304-307 |
| ISSN: |
1662-8985 |
| Popis: |
A novel catalyst, H3PW6Mo6O40/SiO2was 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 SiO2is 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/SiO2catalysis generally results in good yields of acetals and ketals under mild reaction conditions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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