大连工业大学学报2011，Vol.30Issue(2)：129-132,4.
碱性[Bmim]Im离子液体催化合成DEHC
Synthesis of di-2-ethy hexyl carbonate using [Bmim]Im as a catalyst
摘要
Abstract
Di-2-ethy hexyl carbonate (DEHC) was prepared by transesterifying dimethyl carbonate (DMC) with 2-ethylhexanol (EHOH) in the presense of [Bmim]Im (paired by 1-butyl-3-methylimidazolium cation and imidazolide anion) as a catalyst. The optimum process condition was as follows: the catalyst amounts was 2.0 ％, molar ratio of 2-ethylhexanol to DMC was 4∶1, the reaction temperature and time of the 1st step is 90 ℃ and 2 h respectively, the reaction temperature and time of the 2nd step is 120 ℃ and 4 h, in that the yield of DEHC is 66.15％. The gas chromatography shows that the purity of DEHC is above 99％. The structure of DEHC was characterized using FTIR and 1H NMR. Our experiments demonstrated that, by taking [Bmim]Im as catalyst, this technology should be a valuable and broadening routine for similar transesterifying reactions.关键词
碱性离子液体/碳酸二异辛酯/碳酸二甲酯/离子液体催化/酯交换反应Key words
alkaline ionic liquid/ di-2-ethy hexyl carbonate/ dimethyl carbonate/ ionic liquid catalysis reaction/ transesterification分类
化学化工引用本文复制引用
潘素娟,王大鸷,于长顺,李炎龙,张绍印..碱性[Bmim]Im离子液体催化合成DEHC[J].大连工业大学学报,2011,30(2):129-132,4.基金项目
国家自然科学基金资助项目(20771030 （）
20671025). （）
