In these work, we studied the incorporation of molybdenum on a silica support and its catalytic behaviour in the epoxidation reaction with hydroperoxides. We have incorporated the molybdenum using bis-oxo molybdenum(VI) acetylacetonate as precursor and different solvents: ethanol, tetrahydrofurane and its mixtures. The synthesized catalysts were characterized by chemical analysis, nitrogen adsortion-desorption isotherms, XRD, UV-Vis, FTIR and XPS, finally we have tested the catalytic activity in cyclohexene epoxidation reaction of all different catalysts prepared. Molibdenum was incorporated on the support only when THF or the mixture ethano-water was employed. We have prepared catalysts with different amount ratios precursor-support. The catalytic behavior depends on the ammout of molibdenum incorporated and the solvent employed in the synthesis. The heterogeneous catalysts prepared in THF are more active in the epoxidation of cyclohexene with TBHP than water-ethanol counterparts, aditionally these catalysts have a epoxide selectivity higher than the homogenous reference catalyst (bis-oxo molybdenum(VI) acetylacetonate).

Catalytic epoxidation of cyclohexene with tertbutyl hydroperoxide using molybdenum heterogeneous catalysts

243rd National Meeting (2012)

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