Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF6] (3) Ternary Systems between 303.15 and 323.15 K,Journal of Chemical & Engineering Data

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Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF6] (3) Ternary Systems between 303.15 and 323.15 K
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-04-21 , DOI: 10.1021/acs.jced.1c00041
Lixia Yang ₁ , Yuexia Han ₂ , Zhen Jiao _{1,

2,

3}

Affiliation

To obtain the basic data for the recovery of 1-methylimidazole from wastewater by extraction, the ternary liquid–liquid phase equilibrium data of the water (1) + 1-methylimidazole (2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF₆]) (3) system were determined using an equilibrium autoclave at the temperatures of 303.15 to 323.15 K and 101.32 kPa. The solute distribution coefficient (D) and the selectivity (S) of the ternary system were calculated in accordance with the experimental data. Their values were up to 1.39 and 41.17, respectively, which showed that the ionic liquid can extract 1-methylimidazole effectively. The experimental results showed that the temperature had a slight effect on the liquid–liquid equilibrium behavior. Meanwhile, the calculated results revealed that the selectivity coefficient decreased with the enhancing concentration of 1-methylimidazole in the ternary system and the increasing temperature. In addition, the nonrandom two liquid (NRTL) model was used for correlation of the ternary systems. The root-mean-square deviation value of 0.0218 indicated that the calculated results using the model were in good agreement with the experimental data and were reliable to apply to practice.

中文翻译：

水（1）+ 1-甲基咪唑（2）+ [Bmim] [PF ₆ ]（3）303.15至323.15 K之间的三元体系的液-液平衡的测量和相关性

为了获得通过萃取从废水中回收1-甲基咪唑的基本数据，水（1）+ 1-甲基咪唑（2）+ 1-丁基-3-甲基咪唑六氟磷酸盐（[Bmim ] [PF ₆ ]）（3）系统是使用平衡高压釜在303.15至323.15 K和101.32 kPa的温度下测定的。溶质分布系数（D）和选择性（S根据实验数据计算出三元体系的）。它们的值分别高达1.39和41.17，表明该离子液体可以有效地提取1-甲基咪唑。实验结果表明，温度对液-液平衡行为有轻微的影响。同时，计算结果表明，随着1-甲基咪唑在三元体系中浓度的增加和温度的升高，选择性系数降低。另外，使用非随机二液（NRTL）模型对三元系统进行关联。均方根偏差值为0.0218，表明该模型的计算结果与实验数据吻合良好，可以可靠地应用于实践。

更新日期：2021-05-13

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