离子液体在烯烃环氧化反应中的应用

摘要

The epoxidation of olefins, such as 1 -octene and cyclooctene were conducted in ionic liquid (C1imCH2CH2COOH)HS04,with aqueous solution of hydrogen peroxide ( mass fraction 30% ) as oxidant, [ [ ( phens )2 ( H2O ) FeII ]2 ( μ - O ) ] (ClO4)4 as catalyst.and the influence of reaction temperature, reaction time and the reuse of catalytic system were investigated. The results showed that under the optimal condition of reaction temperature 5 ℃ .reaction time 15 min,the conversion of 1 - octene could reach 99%. The catalytic activity decreased gradually with increasing the reuse frequency of the catalytic system.%研究了1-辛烯、环辛烯等多种烯烃的环氧化反应,考察了反应温度、反应时间、催化体系循环使用次数等因素对环氧化反应的影响.结果表明,在离子液体1-甲基-3-丙酸咪唑硫酸氢盐中,以H2O2质量分数为30％的双氧水溶液为氧化剂,以[[(phens)2(H2O)Fe(Ⅲ)]2(μ-O)](ClO4)4为催化剂,在反应温度为5℃,反应时间为15 min的最佳工艺条件下,1-辛烯转化率可达99％；催化活性随催化体系循环使用次数的增加而逐渐下降.