钴-席夫碱-壳聚糖/凹凸棒土对苯乙烯环氧化的催化性能  

Catalytic Performance of Cobalt-Schiff Base-Chitosan/attapulgite for Epoxidation of Styrene

作　　者：冯辉霞[1] 高晓红[1] 陈娜丽[1] 段玲玲[1] 张娟[1] 李汉峰[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《应用化学》2014年第2期159-164,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目(51063003);甘肃省高校基本科研业务费(1105ZTC136)~~

摘　　要：以NaOH固化法制备的壳聚糖/凹凸棒土(CS/ATP)复合树脂为载体,以水杨醛和天冬氨酸合成的席夫碱为配体,分别合成Co、Mn、Cu、Fe和Ni的席夫碱金属配合物及其负载型席夫碱金属配合物,并通过FT-IR对其进行结构表征,且以苯乙烯为底物,分子氧为氧源,分别考察了各种催化剂对苯乙烯的环氧化性能。实验结果表明,在小分子席夫碱金属配体中,Co-Schiff碱催化性能较好。将Co-Schiff碱负载到CS/ATP复合树脂中,综合考察了Co-Schiff碱-CS/ATP的用量、温度、时间对苯乙烯催化环氧化性能的影响,结果表明,反应温度为80℃,反应时间为8 h,苯乙烯的转化率达93.1%。With the Schiff base of L-aspartic acid and salicylaldehyde as the ligands, the composite resin of chitosan/attapulgite（CS/ATP） produced by NaOH curing method as the carrier, the Schiff base metal complexes and the load-type Schiff base metal complexes of Co, Mn, Cu, Fe, Ni were synthesized. Their structural characterizations were determined by FT-IR. The catalytic performance of each catalyst for epoxidation of styrene was studied. Experiments show that the catalytic performance of Co-Schiff base is better in small molecule ligand Schiff base metal complexes. Therefore, Co-Schiff base was loaded in CS/ATP composite resin and the effects of the amount of Co-Schiff base-CS/ATP catalyst, reaction temperature and reaction time on the catalytic epoxidation of styrene were investigated. Finally the results show that the best reaction conditions are as follows：the temperature is 80 ℃ and the reaction time is 8 h, which results in a conversion rate of 93.1% for epoxidation of styrene.

关 键 词：席夫碱金属配合物 苯乙烯 壳聚糖 凹凸棒土 复合树脂 催化环氧化 

分 类 号：O643.3[理学—物理化学]