Liquid–Liquid Equilibrium for Ternary Systems 2,2,2-Trifluoroethanol + Water + (Ethyl Acetate/Isopropyl Acetate/Isobutyl Acetate) at 308.15 K under 101.3 kPa

Abstract

2,2,2-Trifluoroethanol (C 2 H 3 F 3 O, TFE) is a useful fluorine-containing alcohol. During the synthesis and application of TFE, TFE, and water can form an azeotropic mixture. To recover TFE from the mixture of TFE and water by liquid−liquid extraction (LLET), in the current work, three organic solvents, isobutyl acetate (C 6 H 12 O 2 ), isopropyl acetate (C 5 H 10 O 2 ), and ethyl acetate (C 4 H 8 O 2 ), were chosen as the extractants. The liquid−liquid equilibrium (LLE) behavior for the three mixtures (water + TFE + ethyl acetate/isopropyl acetate/isobutyl acetate) was investigated at 101.3 kPa and 308.15 K. Selectivity (S) and distribution constant (D) were calculated as indexes to evaluate the extraction capacity of the three extractants. The results indicated that isobutyl acetate has better extraction ability in extracting TFE from its aqueous solution of TFE compared to the esters. The NRTL model was used to regress the determined tie-line data. The coherence of the fitted parameters of the NRTL model with the experimental data was checked by topological analysis.

Liquid−Liquid Equilibrium Data for 1-Butanol–Methylcyclohexane and Acetonitrile–Benzene Mixtures Using Multiple Deep Eutectic Solvents Based on Choline Chloride

“…Graphical User Interface software code and MatLab software were used to determine consistency of the binary subsystems and interaction parameters. − In fact, the stability of the studied systems was proved by the consistency of parameters in the NRTL model and experimental data. The Gibbs mixture energy surfaces, G M ( L )/ RT , provided by this correlation were compatible with the LLE data of the systems.…”