Abstract:

H₂O₂was used to prepare the TS-2 gel.Peroxytitanate was formed from the reaction of tetra-n-butyl titanate(TBOT) and H₂O₂, which had the advantages of high Ti content in molecular sieve framework and preventing the formation of anatase TiO₂.In addition, TS-2 prepared at an elevated temperature still had good catalytic performance.The epoxidation of propylene was used to test the catalytic performance of TS-2.The reaction conversion based on H₂O₂ was 94% while the propylene oxide(PO) selectivity reached as high as 97%.The pH value of reaction medium influenced the composition of the product remarkably.The PO selectivity increased significantly if a small amount of base was added into the reaction medium.But a larger amount of base easily inhibited the activity of TS-2.