Abstract
Abstract The liquid-phase decomposition of cyclohexenyl hydroperoxide in cyclohexene has been studied using as catalysts three types of manganese dioxide with different specific surfaces. The influence of the initial hydroperoxide concentration, catalyst weight to liquid volume ratio and temperature was determined in each case. It is postulated that hydroperoxide forms an equilibrium complex with the catalyst which decomposes to yield free radicals. The initial activity of the oxides decreased with time during the reaction, and the observed decay in the rate of hydroperoxide decomposition has been attributed mainly to the deactivation of the catalyst surface. Product distribution studies showed that the decomposition products were cyclohexenol, cyclohexenone, and water. The number of moles of alcohol formed was higher than the number of moles of ketone in each case. A reaction mechanism is proposed and a rate equation consistent with the experimental results for hydroperoxide decomposition is presented.
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