Kinetics of the Oxidation of Styrene to Benzaldehyde Catalyzed by Manganese (Ⅲ)- Salen Complex 1

摘要

In this paper ,the synthesis of catalyst Manganese(Ⅲ) salen complex and its catalytic activity for styrene oxidation by O2 are studied. Three catalysts are prepared by condensation salicylaldehyde or its derivatives with diamine. In addition, the reaction kinetic of styrene oxidation catalyzed by Manganese (III) salen complex is investigated. According to the reaction principle the dynamic model is set up, the experimental data are calculated and analyzed by mathematics deduction. As the results showed, the kinetic equation of the styrene oxidation is expressed as follow:v=dc/dt=k'[A]0.5·[B]3.0 Where: [A] Concentration of Mn(III)-Salen complex; [B] Concentration of styrene; k'-rate constant. Base on the kinetic results above, the pseudo-active-energy (Ea) of the oxidation catalyzed by Mn(III)-salen complex is obtained by the equation of Arrhenins, and the value is 81.49 kJ·mol -1 .