Solubility, liquid–liquid equilibrium and critical states for the quaternary system acetic acid–ethanol–ethyl acetate–water at 293.15 K

Solubility, critical states and liquid–liquid equilibrium (LLE) data for the quaternary system acetic acid–ethanol–ethyl acetate–water and for the ternary sub-systems acetic acid–ethyl acetate–water and ethanol–ethyl acetate–water were obtained at 293.15 K and atmospheric pressure. Binodal curves, tie-lines and compositions of critical points were determined. In order to construct the binodal surface and critical curve of the quaternary system, three quaternary sectional planes with several ratios of acetic acid and ethanol were studied. Experimental LLE data were compared with the values calculated by UNIFAC model and it was found that the experimental and calculated data are in a good agreement.

► Solubility data for acetic acid–ethanol–ethyl acetate–water system at 293.15 K.
► LLE tie-lines and critical states of LLE have been determined.
► The data for two ternary sub-systems with miscibility gap are presented.
► The LLE data have been also calculated by UNIFAC method.