EPOXIDATION OF ALLYL CHLORIDE WITH HYDROGEN-PEROXIDE CATALYZED BY TITANIUM SILICALITE-1

In this paper, different parameters affecting the epoxidation of allyl chloride with hydrogen peroxide, as well as the kinetic characteristi cs are described. The influence of the amount of catalyst and the conc entration of oxidant and substrate, the effect of solvent and additive have been investigated. The epoxidation of allyl chloride is first or der with respect to the amount of catalyst and between zero and unity order in the substrate and oxidant concentration. The epoxidation was accelerated and the selectivity was improved with increasing the conce ntration of substrate and the amount of TS-1. Finally, a possible kine tic model was supposed according to Eley-Rideal isotherms, which was i n agreement with experimental data. Both the weak acidity of TS-1 surf ace and the proton produced by the interaction of active sites of TS-1 with hydrogen peroxide can catalyze the solvolysis of oxirane product . The best solvent for epoxidation of allyl chloride is methanol or me thanol/water mixture. Small amount of additives can affect the reactio n seriously. Inorganic basic compounds and fluorides can suppress the epoxidation completely, while acidic materials can promote the solvoly sis of product.