Brφnsted-Lewis双酸性离子液体的合成及其催化松香二聚反应  

Synthesis of Brφnsted-Lewis Acidic Ionic Liquids and their Use as Catalysts in Rosin Dimerization

作　　者：王金龙[1] 尤兴林[1] 方云[1] 

机构地区：[1]江南大学化学与材料工程学院食品胶体与生物技术教育部重点实验室,江苏无锡214122

出　　处：《精细化工》2014年第3期342-346,共5页Fine Chemicals

基　　金："十二五"国家科技支撑计划项目(2014BAE03B01)~~

摘　　要：以盐酸为B酸供体将N-甲基咪唑(mim)质子化得到Brφnsted酸性离子液体mim·HCl,继续与Lewis酸供体FeCl3反应合成了一族Brφnsted-Lewis双酸性离子液体氯化-1-氢-3-甲基咪唑氯铁酸盐(1-x)[mim·HCl]x[FeCl3],x为Lewis酸所占的摩尔分数。分别用吡啶和乙腈探针红外光谱表征和比较了其酸性,并将其应用于催化松香的二聚反应。所合成的一族双酸性离子液体中,(1-x)[mim·HCl]x[FeCl3](x=0.64)催化松香二聚反应时,二聚产物的软化点比空白样品提高了15℃;其催化活性在重复利用5次后才开始下降。BrOnsted acidic ionic liquid mim HC1 was synthesized as an intermediate by protonating N-methyl imidazole with BrCnsted acid donor hydrochloric acid. And a group of dual acidic ionic liquid 1-hydro-3-methylimidazole chloride chloroironinates （ 1 - x ） [ mim ~ HC1 ] x [ FeC13 ] （ where x is the mole fractions of the Lewis acid） was synthesized from the reaction of mira ~ HC1 and a Lewis acid donor FeC13. The acidity of the group was characterized and compared to each other by means of FTIR in virtue of pyridine and acetonitrile molecular probe, respectively. The dual acidic ionic liquids were then employed to catalyze rosin dimerization. A dimeric rosin acid with a softening point of 102.4 ℃ was obtained using （ 1 - x） [ mim HC1 ] x [ FeC13 ] （ x = 0. 64） as catalyst, which was 15 ℃ higher than that without using catalyst. The catalytic activity became weaker after the fifth use.

关 键 词：双酸性离子液体 催化剂 松香 二聚反应 二聚松香酸 催化与分离提纯技术 

分 类 号：TQ426.91[化学工程]