Liquid−liquid equilibrium data for tert -amyl ethyl ether (TAEE) + ethanol + 1-octyl-3-methylimidazolium chloride were measured experimentally at 298.15 K. The experimental data were obtained by direct analysis of phases at equilibrium by 1 H NMR and then correlated using the nonrandom two-liquid equation. The nonrandomness parameter (α) was fixed to 0.1, 0.2, and 0.3, and the best results were found with α = 0.1. Distribution coefficients and selectivities obtained show that the ionic liquid used can be an excellent extractant agent of ethanol from its mixtures with TAEE, thus allowing ether purification.
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Arce et al. (2004) studied this question.
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