Role of transition metals during p-xylene oxidation in aqueous system |
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| Authors: | M Hronec and J Ilavský |
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| Institution: | (1) Department of Organic Technology, Faculty of Chemistry, Slovak Technical University, 812 37 Bratislava, Czechoslovakia |
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| Abstract: | The role of transition metals in the mechanism of p-xylene oxidation has been studied in aqueous systems at 140°C and 1.0 MPa of oxygen. The reaction proceeds according to second-order kinetics in p-xylene concentration for all metals and of <0.5 order with respect to metal concentration. For the metals studied the apparent activation energies are almost the same. The results support our previous assumption that (i) the rate-determining propagation step of p-xylene oxidation in aqueous systems does not involve metal ions, (ii) direct oxidation of p-xylene by higher valent metals does not play any significant role.
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