In this work, to separate the azeotrope of isopropanol and water using liquid–liquid extraction, two deep eutectic solvents (DESs) were prepared with methyl trioctyl ammonium chloride and (1-hexanol/1-decanol), which were characterized by 1H NMR and were adopted as extractants. The liquid–liquid equilibrium data for the mixtures (DESs + isopropanol + water) were determined at 298.15 K and 308.15 K. The distribution ratio (D) and separation factor (S) were obtained to judge the extraction performance for the selected DESs. The calculated values of D and S showed that the separation of the mixture isopropanol and water by the DESs is feasible. In addition, the experimental data were successfully fitted by the NRTL model with the RMSD values less than 0.0080. The parameters of the NRTL model were optimized, which is helpful for the separation design and simulation.

中文翻译：

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用深共熔溶剂从水溶液中分离异丙醇：液-液平衡测量和热力学模型

在这项工作中，为了使用液-液萃取分离异丙醇和水的共沸物，用甲基三辛基氯化铵和（1-己醇/1-癸醇）制备了两种低共熔溶剂 (DESs)，并通过 1H NMR 和被用作萃取剂。在 298.15 K 和 308.15 K 下确定混合物（DESs + 异丙醇 + 水）的液-液平衡数据。获得分配比 (D) 和分离因子 (S) 来判断所选 DESs 的萃取性能。D 和 S 的计算值表明使用 DES 分离异丙醇和水的混合物是可行的。此外，实验数据被NRTL模型成功拟合，RMSD值小于0.0080。优化了NRTL模型的参数，