溶析结晶法在离子液体[C_5mim][OAc]合成中的应用  

Application of solventing-out process on the synthesis of ionic liquid [C_5mim][OAc]

作　　者：付桂红[1] 李龙[2] 马晓雪[2] 佟静[2] 关伟[2] 

机构地区：[1]辽河石油职业技术学院,辽宁盘锦124103 [2]辽宁大学化学院,辽宁沈阳110036

出　　处：《化学试剂》2011年第10期936-938,共3页Chemical Reagents

基　　金：辽宁省重点实验室资助项目(LS2010068,LS20-10069)

摘　　要：研究了用溶析结晶法辅助合成一种新型的碱性离子液体:1-甲基-3-戊基咪唑醋酸盐([C5mim][OAc)],并通过1 HNMR进行了表征。合成[C5 mim][OAc]所需中间体溴代1-甲基-3-戊基咪唑[C5 mim][Br],因其凝固点很低给重结晶纯化带来了难度。基于这一点,本文提出了用二次去离子水作为析出剂进行离子液体[C5mim][Br]重结晶提纯。通过多次水平实验,得到了提纯中析出剂加入量的最加配比,并就提纯后产物的回收率进行了讨论。A new ionic liquid （1-methyl-3-amylimidazolium acetate） was synthesized by solventing-out process and the sample was confirmed by 1HNMR.Anion exchange resin was used to synthesize .Because the difficult of purification of by recrystallization due to low freezing point in its synthesis process of intermediate （1-methyl-3-amylimidazolium bromine） the secondary deionized water as precipitation agent of recrystallization about purification of ionic liquid was used.The most precipitation agent addition ratio in the purification were obtained,and the recovery ratio of product was discussed in the after purification.

关 键 词：离子液体 溶析结晶 纯化 1-甲基-3-戊基咪唑醋酸盐 

分 类 号：O658[理学—分析化学]