Abstract: 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.

摘要： Далин等在76～120℃范围内研究了丙烯与乙苯氢化过氧化物环氧化反应的钼催化动力学,提出了该反应的机理模式,并认为催化剂的有效浓度在反应过程中是不变的。本文在Далин等研究的基础上对该反应进行了实验研究,对所得数据以及文献[3]所给出的数据的分析表明,催化剂的有效浓度在反应过程中并不是不变的,而是呈一级反应规律下降。为此,作者对文献[3]的机理模式提出了修正,并指出上述催化剂失活的机理与ΦapбepoB所提出的阻抑机理不同。