CIESC Journal

• 化工过程与装备 • 上一篇    下一篇

离子液体对乙腈-水共沸物系汽液平衡的影响

李春利,李聚魁,刘艳稳,方 静   

  1. 河北工业大学化工学院,天津 300130
  • 出版日期:2011-12-05 发布日期:2012-03-02

Effect of ionic liquid on the vapor-liquid equilibrium of acetonitrile-water

LI Chunli,LI Jukui,LIU Yanwen,FANG Jing   

  1. School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China
  • Online:2011-12-05 Published:2012-03-02

摘要:

选择离子液体1-丁基-3-甲基咪唑氯盐(Bmin[Cl])作为分离乙腈-水共沸物系的溶剂。在0.101MPa下测定了在离子液体Bmin[Cl]含量为10%20%30%时乙腈-水物系的汽液平衡数据。实验结果表明,离子液体Bmin[Cl] 可以提高乙腈对水的相对挥发度,离子液体Bmin[Cl]含量在20%以上时可以消除乙腈-水物系的共沸点。离子液体Bmin[Cl]可以用作分离乙腈-水物系的萃取剂。用改进的Furter方程对数据进行了关联,得到了离子液体Bmin[Cl]对乙腈-水物系的盐效应参数。

Abstract:

The ionic liquid 1-butyl-3-methylimidazolium chlorideBmin[Cl]was selected as the solvent to separate azeotropic mixture of acetonitrile-water. Isobaric vapor-liquid equilibrium data for acetonitrile-water system containing ionic liquid Bmin[Cl] were measured at 0.101 MPa. The azeotropic point of acetonitrile - water can be eliminated by adding ionic liquid Bmin[Cl]and relative volatility of acetonitrile to water can be increased.  By using the modified Furter equation of the VLE for mixed-solvent electrolyte systemsthe parameters of salt-effection of ionic liquid Bmin[Cl] to acetonitrile-water system was correlated.