HMImPF6 ionic liquid that separates the azeotropic mixture ethanol + heptane

A. B. Pereiro; E. Tojo; A. Rodríguez; J. Canosa; J. Tojo

doi:10.1039/B513079D

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HMImPF₆ionic liquid that separates the azeotropic mixture ethanol + heptane†

A. B. Pereiro,^a E. Tojo,^b A. Rodríguez,*^a J. Canosa^a and J. Tojo ‡^a

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* Corresponding authors

^a Chemical Engineering, Vigo University, P. O. Box 36310, Vigo, Spain
E-mail: aroguez@uvigo.es
Tel: +34 986 81 23 12

^b Organic Chemistry Department, Vigo University, P. O. Box 36310, Vigo, Spain

Abstract

1-Hexyl-3-methylimidazolium hexafluorophosphate (HMImPF₆) is suitable for use as the solvent in the petrochemical extraction process for the removal of heptane from its azeotropic mixture with ethanol. The experimental determination of the liquid–liquid equilibrium (LLE) for the ternary system heptane + ethanol + HMImPF₆ at 298.15 K was carried out. The solute distribution ratio and the selectivity of the HMImPF₆ have been determined from the tie-line data. A comparative study has been made in terms of selectivity and solute distribution data with other ionic liquids. The NRTL equation was verified to accurately correlate the experimental data.

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Article information

DOI: https://doi.org/10.1039/B513079D
Article type: Paper
Submitted: 14 Sep 2005
Accepted: 06 Feb 2006
First published: 21 Feb 2006

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Green Chem., 2006,8, 307-310

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HMImPF₆ ionic liquid that separates the azeotropic mixture ethanol + heptane

A. B. Pereiro, E. Tojo, A. Rodríguez, J. Canosa and J. Tojo, Green Chem., 2006, 8, 307 DOI: 10.1039/B513079D

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