Influence of the Salting-Out Ability and Temperature on the Liquid–Liquid Equilibria of Aqueous Two-Phase Systems Based on Ionic Liquid–Organic Salts–Water
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- 作者：Yuliang Li ; Xiaojia Lu ; Wenting He ; Rong Huang ; Yingjie Zhao ; Zhiqiang Wang
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2016
- 出版时间：January 14, 2016
- 年：2016
- 卷：61
- 期：1
- 页码：475-486
- 全文大小：470K
- ISSN：1520-5134
文摘
In the present work, (liquid + liquid) equilibrium (LLE) data have been determined experimentally for aqueous two-phase systems formed by the ionic liquids n-butylpyridinium trifluoromethanesulfonate [Bpy]OTF and the organic salts of ammonium citrate ((NH4)3C6H5O7) and sodium succinate (Na2C4H4O4) at T = (298.15, 318.15, and 328.15) K. Binodal curves were fitted to two empirical equations with different parameters. The quality of the experimental LLE data was established by applying the Othmer–Tobias and Bancroft correlations. The tie-line data of the systems at three different temperatures has also been described by the Setschenow-type equation. The phase diagrams for the two-phase systems show good agreement with the experimental data. Furthermore, the temperature dependence of the binodal curves has also been discussed. The results show the salting-out ability of Na2C4H4O4 exceed (NH4)3C6H5O7, which can be related to the Gibbs energy.