Activity coefficients at infinite dilution of organic solutes in 1-hexyl-3-methylimidazolium hexafluorophosphate from gas-liquid chromatography

被引：127

作者：

Letcher, TM ^{[1
]}

Soko, B

Ramjugernath, D

Deenadayalu, N

Nevines, A

Naicker, PK

机构：

[1] Univ KwaZulu Natal, Sch Pure & Appl Chem, ZA-4041 Durban, South Africa

[2] Univ KwaZulu Natal, Dept Chem, ZA-4000 Durban, South Africa

[3] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2003年 / 48卷 / 03期

关键词：

D O I：

10.1021/je0256481

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Ionic liquids, with their very low vapor pressures and unique solvent properties, are potentially useful solvents for separating organic liquid mixtures by solvent extraction or by extractive distillation. In this work, the activity coefficients at infinite dilution, gamma(13)(infinity), for both polar and nonpolar solutes in the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate have been determined by gas-liquid chromatography at the temperatures (298.15, 313.15, 323.15) K. The partial molar excess enthalpies at infinite dilution and the selectivity values were calculated from the gamma(13)(infinity), values obtained over the temperature range. The selectivity values have been determined and are used to predict the solvent potential of the ionic liquid for the separation of liquid mixtures by extractive distillation.

引用

页码：708 / 711

页数：4

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