Journal
JOURNAL OF INORGANIC MATERIALS
Volume 25, Issue 10, Pages 1041-1046Publisher
SCIENCE CHINA PRESS
DOI: 10.3724/SP.J.1077.2010.01041
Keywords
direct hydrothermal synthesis; template-ion exchange; Si-MCM-41; Sn-MCM-41; Baeyer-Villiger oxidation
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Funding
- National Nature Science Foundation of China and Sinopec [20736009]
- Hunan Provincial Education Department [06B093]
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The molecular sieve catalysis material of Si-MCM-41, Sn-MCM-41 were preparaed under the condition of low template concentration in weak base and the samples were characterized by XRD, N(2) adsorption-desorption, FT-IR. ICP-AES and TEM techniques. Effect of the synthesis methods on the Sn-containing MCM-41 were studied. The results showed that Sn species were mainly incorporated into the framework of MCM-41 molecular sieves prepared by direct hydrothermal synthesis method (DHT), while Sn species were mainly existed on the wall surface of Sn-MCM-41 molecular sieves prepared by template-ion exchange method (TIE). The catalytic properties of Sn containing MCM-41 molecular sieves in Baeyer-Villiger oxidation of cyclohexanone were investigated. Catalytic activity results show that under the reaction condition of n(H(2)O(2)):n(Cyclohexanone)=3:1, 30 g dioxane, at 70 degrees C for 6 h, the conversion of cyclohexanone and the selectivity of c-caprolactone reach 40.02% and 45.69%, respectively.
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