摘要
以超临界CO2为溶剂,由N-甲基咪唑和溴代正丁烷制备了标题化合物,并采用超临界CO2萃取的方法纯化产物。考察了超临界CO2温度、压力和时间对反应产率及对未反应的溴代正丁烷的萃取率的影响。产物的结构和纯度通过1HNMR表征。
A green process for preparing the key ionic liquid precursor, 1-butyl-3-methylimidazolium bromide ( [Bmim] Br), was developed. With supercritical carbon dioxide ( scCO2 ) used as the solvent, [ Bmim] Br was prepared effectively via the reaction of 1- methylimidazole and 1-bromobutane. The residual reactants could be,in situ, removed completely using scCO2 extraction after the reaction to purify the product. The effect of pressure, tempera- ture, and time on the yield of [ Bmim ] Br and on the extraction efficiency for the residual reactant (1-bromobutane) was investigated. The structure and purity of the final product were characterized by means of 1^HNMR spectroscopy.
出处
《化学试剂》
CAS
CSCD
北大核心
2008年第8期597-599,共3页
Chemical Reagents
基金
北京市自然科学基金资助项目(2052010)