The General Phase Behavior of Mixtures of 1Alkyl-3-MethylimidazoliumBis(trifluoromethylsulfonyl)amides with n-Alkyl-alcohols
Vale VR, Will S, Schroeer W, Rathke B (2012)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2012
Journal
Publisher: Wiley-Blackwell / Wiley-VCH Verlag
Book Volume: 13
Pages Range: 1860-1867
Journal Issue: 7
Abstract
The liquid-liquid equilibrium (LLE) phase behavior of mixtures of 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide (C mimNTf ) with the n-alkyl alcohols (C OH; 3≤n≤8) is described. By applying the cloud-point method, the LLEs were determined over a temperature range of 275-423 K at ambient pressure. Partial miscibility with upper critical solution temperatures (UCST) was observed. The UCST increase with increasing chain length of the alcohols. The phase diagrams were analyzed numerically by presuming Ising criticality. Concepts for the description of the asymmetry of the phase diagram by presuming the validity of the rectilinear diameter rule or a nonlinear diameter requested by the theory of complete scaling were applied. The results (UCST, critical composition, width and diameter of the phase diagrams) are compared with similar systems and discussed in terms of the corresponding state behavior; they map on a single curve. From at least 45 individual phase diagrams, general aspects of the behavior of this ionic liquid-alcohol mixture type were extracted. A simple empirical relationship was formulated to allow the description of the UCST with an accuracy of about 10 K when taking the ratio of the molar volumes of the alcohol and the 1-alkyl-3-methylimidazolium cation of the ionic liquid into account. © 2012 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim.
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Germany (DE)How to cite
APA:
Vale, V.R., Will, S., Schroeer, W., & Rathke, B. (2012). The General Phase Behavior of Mixtures of 1Alkyl-3-MethylimidazoliumBis(trifluoromethylsulfonyl)amides with n-Alkyl-alcohols. ChemPhysChem, 13(7), 1860-1867. https://dx.doi.org/10.1002/cphc.201100911
MLA:
Vale, Vlad R., et al. "The General Phase Behavior of Mixtures of 1Alkyl-3-MethylimidazoliumBis(trifluoromethylsulfonyl)amides with n-Alkyl-alcohols." ChemPhysChem 13.7 (2012): 1860-1867.
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