【摘 要】
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Catalytic epoxidation of styrene by tert-butyl hydroperoxide(TBHP)over Prussian blue analogues(PBA)has been investigated.In this study,PBA catalysts were prepared by precipitation of metallic salts wi
【机 构】
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State Key Laboratory of Applied Organic Chemistry,College of Chemistry and Chemical Engineering,Lanz
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Catalytic epoxidation of styrene by tert-butyl hydroperoxide(TBHP)over Prussian blue analogues(PBA)has been investigated.In this study,PBA catalysts were prepared by precipitation of metallic salts with metallo-cyanide salts in aqueous solution and characterized by various techniques.The effects of various reaction parameters such as reaction temperature,solvent nature,styrene/TBHP molar ratio and reaction time,have been optimized.Styrene conversion of 96%with styrene oxide selectivity up to 64%was achieved using Cu-Co PBA catalyst at optimum reaction condition,and the catalytic activity of the catalyst remained almost unchanged after four reaction cycles.Furthermore,a kinetic investigation of the epoxidation of styrene with TBHP has been carried out,using the initial rate method.A first order with respect to the concentrations of styrene,TBHP and catalyst were determined and an apparent activation energy value of 9.15 kJ/mol was obtained.
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