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Surface modified amorphous titanosilicate catalysts for liquid phase epoxidation |
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| Authors: | R Van Grieken J L Sotelo C Martos J L G Fierro M Lpez-Granados R Mariscal |
| Affiliation: | a Department of Experimental Sciences and Engineering, Rey Juan Carlos University, 28933 Móstoles ( Madrid), Spain b Department of Chemical Engineering, Complutense University of Madrid, 28040 Madrid, Spain c Institute of Catalysis and Petrochemistry, CSIC, Cantoblanco, 28049 Madrid, Spain |
| Abstract: | Titanium-containing mesoporous silica has been prepared by silylation of mixed oxides obtained via sol–gel method. These samples displayed enhanced activity in the epoxidation of styrene with ButOOH in comparison to normal xerogels or other titanium-containing catalytic systems. The influence of the extension of the silylation reaction, as well as the use of different silylating agents, have been investigated. Samples were characterised by FTIR, XRF, 29Si-MAS NMR, diffuse reflectance UV–Vis and N2 adsorption–desorption isotherms, X-ray photoelectron spectroscopy (XPS) and FTIR of adsorbed deuteroacetonitrile. The improvement in the catalytic activity achieved has been related to the removal of OH groups by means of calcination or silylation treatments. |
| Keywords: | Amorphous titanosilicate Epoxidation Sol–gel method Silylation reaction |
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