甲醇-乙腈-l-丁基-3-甲基咪唑四氟硼酸盐三组分物系的汽液平衡  

Vapor-Liquid Equilibrium for Methanol-Acetonitrile-1-Butyl-3-Methylimidazolium Tetrafluoroborate Ternary System

作　　者：李群生[1] 王海川[1] 冉晓萌[2] 朱炜[1] 付永泉[1] 王宝华[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]北京中医药大学中药学院,北京100102

出　　处：《石油化工》2012年第2期177-180,共4页Petrochemical Technology

基　　金：国家自然科学基金资助项目(20476005);国家科技支撑计划课题子课题(2006BA109B07-01)

摘　　要：在101.32 kPa下,用CE-2型Othmer汽液平衡釜测定了甲醇-乙腈-l-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)三组分物系的等压汽液平衡数据;采用UNIFAC方程对实验数据进行了关联。实验结果表明,与未加入[bmim]BF4相比,加入[bmim]BF4后甲醇-乙腈二组分物系的汽液平衡线产生偏离,[bmim]BF4含量越高,偏离程度越大;[bmim]BF4具有明显的盐析效应,当[bmim]BF4的含量为10%(x)时,甲醇-乙腈物系的共沸点消失;UNIFAC方程可用于预测甲醇-乙腈-[bmim]BF4三组分物系的汽液平衡。Isobaric vapor-liquid equilibrium for methanol-acetonitrile-1-butyl-3-methylimidazolium tetrafluoroborate（BF4） ternary system was measured at 101.32 kPa using CE-2 Othmer vapor-liquid equilibrium still.UNIFAC equations were used to correlate the experimental data.The experimental results indicated that the vapor-liquid equilibrium curves of the methanol-acetonitrile-BF4 system deviated from that of the BF4-free system and the deviation increased with the increase of the BF4 dosage.The ionic liquid BF4 exhibited notable salt-out effect which could enhance the relative volatility.When the mole fraction of BF4 amounted to 10%,the azeotropic point disappeared.UNIFAC equation can be used to predict the equilibrium of methanol-acetonitrile-BF4 system.

关 键 词：甲醇 乙腈 1-丁基-3-甲基咪唑四氟硼酸盐 汽液平衡 离子液体 UNIFAC方程 

分 类 号：TQ013.1[化学工程]