Abstract
The activity and selectivity of a catalyst (Au/γ–Al2O3) and the support (γ–Al2O3 cubic) in the oxidation reaction of cyclohexene in the liquid phase to obtain (epoxycyclohexane, 2-cyclohexen-1-ona, 2-cyclohexen-1-ol) were evaluated. The catalyst was prepared by the precipitation-deposition method from aqueous solutions of HAuCl4, citric acid (2% m/v) and polyvinyl alcohol. For the adequacy of the support, starting from boehmite calcined at 773 K, γ–Al2O3 phase was obtained. The reaction products and the evaluation of the same were analyzed by gas chromatograph (GC), showing relevant results of the Au/γ–Al2O3 system with high conversion levels, mostly to products of 2-cyclohexen-1-one, 2-cyclohexen-1-ol with 31.17% and 25.89% selectivity respectively, and to a lesser proportion to epoxycyclohexane with 13.33% selectivity. Regarding to the system formed by the support, the results reported were 13.31% for 2-cyclohexen-1-ona, 4.28% for 2-cyclohexen-1-ol and 3-23% epoxycyclohexane.
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