In the temperature range of 76℃ to 120℃

and others studied the kinetics on molybdenum-catalysed epoxidation of propylene with ethylbenzene hydroperoxide

proposed a mechanism model of this reaction and suggested that effective concentration of catalyst is constant during the process of epoxidation. In this paper

the reaction has been studied experimentally based on investigation. After analyzing the data obtained in our experiment and that of

it is shown that the effective concentration of the catalyst is not a constant but a variable

and the consumption rate of the catalyst is in accordance with the first order reaction. Thus

the authors have corrected the mechanism model in literature [3] and indicated that the deactivation mechanism of the catalyst is different from the inhibition mechanism described by.