Choline chloride-based deep eutectic solvent
(DES) was tested for the separation of azeotropic mixtures of
ethanol−ethyl acetate, n-propanol−n-propyl acetate and nbutanol−
n-butyl acetate via liquid−liquid extraction. The mixture
of choline chloride with malonic acid with a molar ratio of 1:1
was used. Extraction experiments were conducted with the
ternary mixture ethanol−ethyl acetate−DES at temperatures
293.15, 303.15, and 313.15 K and with ternary mixtures npropanol−
n-propyl acetate−DES and n-butanol−n-butyl acetate−
DES at 293.15, 303.15, 313.15, and 323.15 K. Liquid−
liquid tie-lines for studied systems were determined. The
extraction performance of DES was characterized with solute
distribution coefficients and values of selectively respectively to
alcohol. The influence of the alkyl chain length of the alcohol and ester on the phase equilibria was investigated. Experimental
data were fitted using the nonrandom two liquids model.