Separation of Benzene and Hexane by Solvent Extraction with 1-Alkyl-3-methylimidazolium Bis{(trifluoromethyl)sulfonyl}amide Ionic Liquids: Effect of the Alkyl-Substituent Length
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- 作者：Alberto Arce ; Martyn J. Earle ; Hé ; ctor Rodrí ; guez ; Kenneth R. Seddon
- 刊名：Journal of Physical Chemistry B
- 出版年：2007
- 出版时间：May 10, 2007
- 年：2007
- 卷：111
- 期：18
- 页码：4732 - 4736
- 全文大小：223K
- 年卷期：v.111,no.18(May 10, 2007)
- ISSN：1520-5207
文摘
The influence of the alkyl-substituent chain in 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ionic liquids ([Cnmim][NTf2], where n is the length of a linear alkyl chain) as solvents for the separationof benzene and hexane by liquid extraction was investigated. The liquid-liquid equilibrium (LLE) at 25 
Cfor the ternary systems ([Cnmim][NTf2] + hexane + benzene), with n taking the values 4, 8, 10, and 12,were determined. These data were analyzed and compared to those previously reported for the system ([C2mim][NTf2] + hexane + benzene). The results show that short alkyl chains on the imidazolium cation of theionic liquid lead to a better extractive separation of benzene and hexane, and reveal the influence of therelative degree of ordering in the ionic liquids on the extraction parameters.
Cfor the ternary systems ([Cnmim][NTf2] + hexane + benzene), with n taking the values 4, 8, 10, and 12,were determined. These data were analyzed and compared to those previously reported for the system ([C2mim][NTf2] + hexane + benzene). The results show that short alkyl chains on the imidazolium cation of theionic liquid lead to a better extractive separation of benzene and hexane, and reveal the influence of therelative degree of ordering in the ionic liquids on the extraction parameters.