Abstract
In the autoinitiated oxidation of pure cyclohexane in the liquid phase at 150°C and under an initial partial pressure of oxygen ot 11kg/cm2, the salt of cobalt reduces the time of induction, but does not increase the rate of transformation. On the other hand, in the oxidation of the mixture cyclohexanecumene, the rate of transformation of cyclohexane is increased, and this increase is more pronounced by the addition of cobalt naphtenate. The induction period decreases with higher cumene or cobalt concentration. The differences between the observed and calculated effects, on the base of deduced kinetical relations, are interpreted as an increase in the chain branching degree when cumene is present. The stability of the cumylperoxydic radicals is related to the effect.
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