期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
室温离子液体催化合成丁二酸二异丙酯
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1. 河北科技大学化学与制药工程学院, 河北 石家庄050018;
2. 石家庄光明日用化学股份有限公司, 河北 石家庄050041;
3. 石家庄焦化集团有限责任公司, 河北 石家庄050031 -
DOI：
Synthesis of Diisopropyl Succinate Catalyzed by Ionic Liquid
摘要/Abstract
合成并表征了N-丁基吡啶硫酸氢盐([BPy]HSO4)、N-丁基吡啶磷酸二氢盐([BPy]H2PO4)、吡啶硫酸氢盐([HPy]HSO4)、1-丁基-3-甲基咪唑硫酸氢盐([Bmim]HSO4)、1-丁基-3-甲基咪唑磷酸二氢盐([Bmim]H2PO4)、N-甲基咪唑硫酸氢盐([Hmim]HSO4)等6种离子液体.首次将离子液体应用于催化合成丁二酸二异丙酯的研究,并探讨了离子液体催化酯化反应机理.结果表明,[HPy]HSO4催化效果较好,在n(酸)∶n(醇)∶n(催化剂)=1∶4∶0.15,80℃,2.5h条件下,丁二酸二异丙酯的收率为82.8%,酯化率可达90.3%.催化剂重复使用10次,活性无明显降低,较传统催化剂表现出明显优势.
Six kinds of ionic liquids,N-butyl-pyridine bisulfate(HSO4),N-butyl-pyridine phosphate(H2PO4),N-pyridine bisulfate(HSO4),1-butyl-3-methyl imidazole bisulfate(HSO4),1-butyl-3-methyl imidazole phosphate(H2PO4),N-methyl-imidazolium bisulfate(HSO4),were designed and synthesized.This is the first time to study the synthesis of diisopropyl succinate catalyzed by ionic liquids,and mechanism of esterification catalyzed by ionic liquids was discussed.It was shown that HSO4 had the best catalytic performance,and the optimal conditions for the synthesis of diisopropyl succinate were:mole ratio of acid to alcohol 1∶4,the amount of catalyst 10 % of succinic acid,reaction temperature 80 ℃,reaction time 2.5 h.The yield of diisopropyl succinate was up to 82.8 %,esterification rate was up to 90.3 %.This catalyst after having been used for 10 times did not show significant decline in its activity.Compared to conventional industrial catalysts,ionic liquids showed the obvious advantages.