Kinetics and Mechanism of Allyl Alcohol Epoxidation with Hydrogen Peroxide on a Titanium Silicalite Catalyst TS-1. Formulation and Discrimination between Hypothetical Mechanisms¹

Abstract—The kinetics of epoxidation of allyl alcohol with hydrogen peroxide in the presence of a titanium-containing zeolite catalyst TS-1 has been studied. The hypothetical mechanisms of varying degrees of complexity were proposed with further discrimination. The results of the kinetic study allow us to conclude the following: inclusion of rate inhibition of the process by the resulting product (glycidol) is an essential condition for adequate description of the kinetic dependences of epoxidation. It was established that both the Eley–Rideal type mechanism and the Langmuir–Hinshelwood mechanism with activation of allyl alcohol and hydrogen peroxide at different catalyst sites make it possible to describe the kinetic regularities within the experimental error. Further discrimination requires additional studies.