Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 76, Issue -, Pages 79-86Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2014.03.008
Keywords
Ionic liquids; Quaternary system; Extraction; Toluene; Alkane
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Funding
- Ministerio de Economia y Competitividad (Spain) [CTQ 2010-18147]
- Xunta de Galicia
- Angeles Alvarino Program
- Fundacao para a Ciencia e a Tecnologia (Portugal) [SFRH/BPD/37775/2007]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/37775/2007] Funding Source: FCT
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(Liquid + liquid) equilibrium (LLE) studies for the extraction of aromatics from alkanes present in the petroleum fractions are important to develop theoretical/semiempirical (liquid + liquid) equilibrium models, which are used in the design of extraction processes. In this work, the ionic liquid 1-ethyl-3-methylimidazolium methylsulfate, [EMim][MSO4], was evaluated as potential solvent for the separation of toluene from heptane and cyclohexane. The LLE data for the quaternary system {heptane (1) + cyclohexane (2) + toluene (3) + [EMim][MSO4] (4)} were experimentally determined at T = 298.15 K and atmospheric pressure. Moreover, the LLE data for the ternary systems {heptane or cyclohexane (1) + toluene (2) + [EMim][MSO4] (3)} were also determined. Solute distribution ratios and selectivities were calculated and analysed in order to evaluate the capability of the ionic liquid to accomplish the separation target. A comparison between the solute distribution ratios and selectivities for the quaternary and the ternary systems was also made. Finally, the experimental tie-line data were correlated with the NRTL model. (C) 2014 Elsevier Ltd. All rights reserved.
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