Abstract In order to enhance the separation ability of ionic liquid (IL) in the toluene-methanol binary azeotrope, the vapor-liquid equilibrium (VLE) data for the ternary systems of toluene + methanol + IL (1-decyl-3-methylimidazolium acetate [DMIM][OAC], 1-tetradecyl-3-methylimidazolium acetate [C14MIM][OAC] or tri octyl methylammonium acetate [N8,8,8,1][OAC]) were measured at 101.3 kPa. The VLE data were well correlated by the nonrandom two-liquid (NRTL) model. The azeotrope of the toluene-methanol mixture can be fully eliminated when IL content is increased to a specific value. The relative volatility (α12) of toluene to methanol is increased with the increase of [DMIM][OAC] or [C14MIM][OAC], while it is decreased with the increase of [N8,8,8,1][OAC]. The separation ability of [DMIM][OAC] is higher than that of [C14MIM][OAC]. The separation abilities of the three ILs were analyzed with the help of their σ-profiles.

中文翻译：

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包括三种离子液体的甲苯-甲醇体系的等压汽液平衡，醋酸根阴离子为 101.3 kPa

摘要 为了提高甲苯-甲醇二元共沸物中离子液体 (IL) 的分离能力，对甲苯 + 甲醇 + IL（1-癸基-3-甲基咪唑鎓醋酸盐）三元体系的气液平衡（VLE）数据进行了研究。 [DMIM][OAC]、1-十四烷基-3-甲基咪唑鎓乙酸盐[C14MIM][OAC] 或三辛基甲基乙酸铵 [N8,8,8,1][OAC]) 在 101.3 kPa 下测量。VLE 数据与非随机两液体 (NRTL) 模型有很好的相关性。当IL含量增加到特定值时，可以完全消除甲苯-甲醇混合物的共沸物。甲苯对甲醇的相对挥发度(α12)随着[DMIM][OAC]或[C14MIM][OAC]的增加而增加，随着[N8,8,8,1][OAC]的增加而减少. [DMIM][OAC]的分离能力高于[C14MIM][OAC]。