MICELLAR-CATALYTIC OXIDATION OF HYDROCARBONS .4. KINETICS AND MECHANISM OF INITIATION STAGE IN CUMENE OXIDATION BY DIOXYGEN IN THE PRESENCE OF AQUEOUS-SOLUTIONS OF SODIUM DODECYL-SULFATE AND COPPER-SULFATE

The rates of radical initiation using data for inhibited oxidation and decomposition of cumyl hydroperoxide (CHP) are determined in the two-phase catalytic system cumene-micellar aqueous solution of sodium dodecyl sulfate and CuSO4. The parameter of cumene oxidability and the fraction of radical decomposition for CHP are 0.47 (mol l-1 min-1)1/2 and 0.24, respectively. The nature of the anion of a water-soluble copper salt does not influence the catalyst activity. The activity of various metal sulfates decreases in the order Cu2+ > Fe2+ much greater than Ni2+ > Co2+ congruent-to Cd2+ > Na+ > K+ > Li+. A mechanism of radical generation inside micelles was suggested and a kinetic equation satisfactorily explaining experimental data was obtained.