(Liquid +Liquid) Equilibrium for Ternary Systems Containing of an Ionic Liquid, n-Hexane and an Organic Compound Involved in the Kinetic Resolution of rac-2-Pentanol

Abstract

In this paper, (liquid +liquid) equilibrium (LLE) data for 12 ternary systems containing an ionic liquid + n-hexane +an organic compound involved in the racemic resolution of rac-2-pentanol (rac-2-pentanol, vinyl butyrate, rac-2-pentyl butyrate, or butyric acid) have been experimentally determined at 298.2 K and atmospheric pressure. The ionic liquids used were

i.	1-ethyl-3-methylimidazolium ethylsulfate, [emim+] [EtSO4 −];
ii.	1-butyl-3–methylimidazolium tetrafluoroborate, [bmim+][BF4 −] and
iii.	1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [bmim+][NTf2 −].

The binodal curves and the tie line compositions of the conjugate solutions were obtained by means of refractive index (ionic liquid rich phase) and by gas cromatography (hexane rich phase) to determine their potential for selectively extracting organic compounds from an ionic liquid reaction mixture. The tie line data were correlated through the use of the Non-Random Two-Liquid (NRTL) model for statistical consistency, which provides excellent agreement with the experimental measurements. There are no literature data for the mixtures discussed in this paper.

Keywords:

• ionic liquids
• liquid-liquid equilibria
• n-hexane
• NTRL model
• racemic resolution
• ternary system

ACKNOWLEDGEMENTS

This work was partially supported by the CICYT CTQ2008-06093/PPQ and SÉNECA foundation 1195/PI/09 grants.