Equilibrium Phase Behavior of Aqueous Two-Phase Systems Containing 1-Alkyl-3-methylimidazolium Tetrafluoroborate and Ammonium Tartrate at Different Temperatures: Experimental Determination and Correlation
Equilibrium Phase Behavior of Aqueous Two-Phase Systems Containing 1-Alkyl-3-methylimidazolium Tetrafluoroborate and Ammonium Tartrate at Different Temperatures: Experimental Determination and Correlation
复制标题
不同温度下含有 1-烷基-3-甲基咪唑鎓四氟硼酸盐和酒石酸铵的水两相体系的平衡相行为：实验测定和相关性
DOI：
10.1021/je2006055
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发表时间：
2011-09-01
期刊：
影响因子：
--
通讯作者：
Yan, Yongsheng
中科院分区：
文献类型：
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作者：
Han, Juan;Wang, Yun;Yan, Yongsheng
水性 1-烷基-3-甲基咪唑鎓四氟硼酸盐 ([Cnmim]BF4, n = 2, 3, 4) + 酒石酸铵 ((NH4)2C4H4O6) 水性两相系统 (ATPS) 的双节数据已在 T = (288.15, 298.15 和 308.15) K 下通过实验确定。使用三个经验方程关联双节数据。还研究了温度对双节曲线的影响，观察到双相区域随着温度的降低而扩大。计算的有效排除体积 (EEV) 和以质量摩尔浓度绘制的双节曲线均表明所研究的离子液体的相分离能力按 [C4mim]BF4 > [C3mim]BF4 > [C2mim]BF4 的顺序排列。根据最高精度的双节曲线经验方程和杠杆法则，通过MATLAB计算液液平衡数据。 Othmer-Tobias 和 Bancroft 方程给出的经验相关方程证明了联络线组成的可靠性。此外，相对简单的...
Binodal data of the aqueous 1-alkyl-3-methylimidazolium tetrafluoroborate ([Cnmim]BF4, n = 2, 3, 4) + ammonium tartrate ((NH4)2C4H4O6) aqueous two-phase systems (ATPSs) have been determined experimentally at T = (288.15, 298.15 and 308.15) K. Three empirical equations were used to correlate the binodal data. The effect of temperature on the binodal curves was also studied, and it was observed that the biphasic region expanded with a decrease in temperature. The calculated effective excluded volume (EEV) and the binodal curves plotted in molality both indicate that the phase-separation abilities of the investigated ILs are in the order of [C4mim]BF4 > [C3mim]BF4 > [C2mim]BF4. On the basis of the empirical equation of binodal curve with the highest accuracy and lever rule, the liquid–liquid equilibrium data were calculated by MATLAB. The reliability of the tie-line compositions was proved by the empirical correlation equations given by Othmer–Tobias and Bancroft equations. Furthermore, a relatively simply t...