摘要
Vapor pressure values of binary systems water ＋ ethanol, water ＋ ionic liquid 1-propyl-3- methylimidazolium bromide （[PMIM] [Br]）, ethanol ＋ [PMIM] [Br] and ternary system water ＋ ethanol ＋ [PMIM] [Br] at different temperatures were measured by using a modified boiling point method in various concentrations of （16.66%, 33.7%）, （17.4%, 33.9%） and （16.5%, 32%） mass percent of ionic liquid, respectively. The experimental vapor pressures of solvent were well correlated by the Antoine-type equation, and the overall average absolute deviation （AAD） was found to be 0.39%. The experimental results for mixtures containing ionic liquid indicate that the vapor pressure of the solvents can be decreased noticeably to different extent due to the affinity difference between ionic liquid and solvent, which is similar to the salt effect of common inorganic salts. As a result, ionic liquid may find industrial applications in extractive distillations for the system with a low separation factor or even for an azeotropic mixture.
二元体系的蒸汽压价值浇+乙醇，水+ionic liquidl-propyl-3-methylimidazolium 溴化物([ PMIM ][浓缩])，乙醇+[ PMIM ][浓缩]并且三元体系水 +ethanol +[ PMIM ][浓缩]被在各种各样的集中使用修改沸点法在不同温度测量(16.66%,33.7%)，，并且((17.4%,33.9%)，并且(16.5%,32%)离子的液体的集体百分比， respectively.The 溶剂的试验性的蒸汽压被theAntoine类型很好相关方程，并且绝对偏差( AAD )被发现是0.39% .Theexperimental 的全面一般水准为包含离子的液体的混合物结果显示溶剂的蒸汽压能由于离子的液体和溶剂之间的亲密关系差别显著地被减少到不同程度，它类似于普通的无机的盐的盐效应。作为结果，离子的液体可以与一个低分离系数或甚至为 azeotropic 为系统在萃取蒸馏发现工业应用。
基金
Supported by the National Natural Science Foundation of China(No. 20376004).
