反应控制相转移催化原位过氧化氢环氧化丙烯反应  

Epoxidation of Propylene Catalyzed by Reaction-Controlled Phase Transfer Catalyst with in-Situ H_2O_2

作　　者：张恒耘[1] 吕迎[1] 李军[1] 高爽[1] 奚祖威[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《催化学报》2010年第10期1253-1256,共4页

基　　金：国家自然科学基金(20233050)

摘　　要：以原位H2O2为氧源,在新型反应控制相转移催化剂(RCPTC)作用下丙烯环氧化反应中,考察了反应温度、反应时间、H2O2浓度和催化剂浓度对反应性能的影响.结果表明,在适宜的反应条件下,RCPTC催化剂循环使用5次后,环氧丙烷产率仍维持在85.6%以上,且催化剂循环反应3次后,其组成趋于稳定.The epoxidation of propylene catalyzed by a reaction-controlled phase transfer catalyst with H2O2 generated by the oxidation of 2-ethylanthrahydroquinone with molecular oxygen in the organic solvent was investigated. Effects of reaction temperature, reaction time, H2O2 concentration, catalyst concentration, and additives on the epoxidation were studied. Under the suitable conditions, the yield of pro-pylene oxide, based on 2-ethylanthrahydroquinone, was above 85.6% in the fifth cycle. The results of 31P MAS NMR of the recovered catalyst showed that the catalyst composition tended to being stable after the third cycle.

关 键 词：丙烯 环氧化 环氧丙烷 磷钨杂多酸盐 反应控制相转移催化 过氧化氢 

分 类 号：TQ223.26[化学工程—有机化工]