化工学报2016，Vol.5Issue(5)：1907-1914,8.DOI:10.11949/j.issn.0438-1157.20151557
SBA-15固载酸性离子液体催化酯化反应性能
Synthesis and performance of heterogeneous catalyst of immobilized acidic ionic liquid on SBA-15 for esterification
摘要
Abstract
To decrease the usage of ionic liquid and facilitate the separation of catalyst from the product, a novel Br?nsted acidic ionic liquid catalyst of 1-(3-sulfopropyl)caprolactam hydrogen sulfate ([C3SO3HCP]HSO4) supported on SBA-15 was prepared through covalent bond grafting method. In order to achieve structural information and stability of catalysts, the samples were characterized by FT-IR, TG, XRD, BET and TEM techniques. The catalytic activities of the immobilized ionic liquid for the esterification of succinic anhydride with ethanol were investigated. It showed that [C3SO3HCP]HSO4has been successfully immobilized onto the SBA-15 with relatively good thermal stability and catalytic activity, which overcomes the drawbacks of low activity of heterogeneous catalyst, and difficult separation of homogeneous catalyst from the reaction system. Under the optimized conditions of 5%(mass) of catalyst dosage,n(C4H4O3):n(C2H5OH)=1:3, 80℃ of reaction temperature, 4 h of reaction time, and 30%(mass) of water carrying agent dosage, the yield of diethyl succinate was up to 93.7%. The SBA-15 immobilized ionic liquids remained satisfactory catalytic activity for the synthesis of diethyl succinate after 8 cycles. Moreover, the IL/SBA-15 exhibited relatively high yield of diethyl succinate for a series of esterification and the product could be separated easily from the reaction system.关键词
SBA-15/固定化/离子液体/酯化反应/催化剂Key words
SBA-15/immobilization/ionic liquid/esterification/catalyst分类
化学化工引用本文复制引用
胡晶晶,赵地顺,胡甜甜,李静静,翟建华..SBA-15固载酸性离子液体催化酯化反应性能[J].化工学报,2016,5(5):1907-1914,8.基金项目
国家自然科学基金项目(20576026).supported by the National Natural Science Foundation of China (20576026). （20576026）
