不同TS-1分子筛含量条状催化剂的丙烯环氧化性能

环氧丙烷(PO)是重要的有机化工原料，主要用于生产聚醚多元醇、丙二醇及其它化工产品。现在工业上主要采用氯醇法和Halcon法生产环氧丙烷，但分别存在污染和联产物量大等问题，人们在改进原有工艺的同时，致力于寻找流程短、副产少、无污染的新工艺。TS-1分子筛的成功合成^[1]及其在以

THE PROPERTIES OF TITANIUM SILICALITE CATALYST WITH DIFFERENT TS-1 CONTENTS

The TS-1 powder,which is synthesized using tetrapropylammonium bromide (TPABr) as template, was molded into catalyst by extruding. The prepared catalysts containing 30%, 50%, 60% or 80% TS-1 were used to catalyze the propylene epoxidation to produce PO in a fixed bed reactor. The results show that TS-1 is the active site of the catalyst. The catalyst with 80% TS-1 has the highest activity and mechanical intensity. The selectivity of PO decreases and the utilization of hydrogen peroxide increases as TS-1 content increases in the catalyst. Both the selectivity of PO and the utilization of hydrogen peroxide increase as the WHSV of propylene increases from 0.30h~(-1) to (0.70h~(-1).) The catalyst containing 80% TS-1 exhibits 97.8% hydrogen peroxide conversion, 86.4% PO selectivity and 91.8% hydrogen peroxide utilization when the WHSV of propylene is 0.70h~(-1).