丙烯环氧化反应中TS-1失活的研究  

STUDY ON THE TS-1 DEACTIVATION DURING PROPYLENE EPOXIDATION

作　　者：闫海生[1] 王祥生[1] 刘靖[1] 郭新闻[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《石油学报（石油加工）》2002年第1期46-51,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金 (2 9792 0 71);中国石油化工集团公司资助项目

摘　　要：采用模拟失活的方法研究了丙烯环氧化反应中TS 1催化剂的失活。结果表明 ,在酸中心催化作用下环氧丙烷可以自聚生成二、三聚物 ,环氧丙烷还可以与丙二醇单甲醚反应生成二、三聚醚 ,由于它们的分子较大 ,在催化剂孔道内的扩散速率较慢 ,易阻塞孔道 ,使反应物无法到达活性位上 。TS 1 deactivation was studied by simulating propylene epoxidation with dilute hydrogen peroxide. The results showed that TS 1 deactivation occured by blocking the zeolite pores with dimers and tripolymers of ether with propylene oxide besides dimer and tripolymer of propylene oxide, which were formed through acid catalysis. The size of polymer molecules were larger, their diffuse speed were slower in zeolite pores. The zeolite pores were easy to be blocked by polymers, and the reactants could not reach the active centers, which caused TS 1 deactivation.

关 键 词：钛硅分子筛 环氧丙烷 失活 TS-1催化剂 丙烯 环氧化反应 

分 类 号：TQ221.212[化学工程—有机化工] TQ426.94