Effects of salt on the LLE and tie-line data for furfuryl alcohol — n-butanol–water at T = 298.15 K

Solubility and tie-line data for the systems containing water + furfuryl alcohol + n-butanol + NaCl were measured at T = 298.15 K and atmospheric pressure. The NRTL and UNIQUAC models were employed to compare the experimental liquid–liquid equilibrium (LLE) data. The binary interaction parameters were determined. The Othmer–Tobias, Hand and Bachman correlation equations were applied to validate the LLE data for these systems. Distribution coefficients and separation factors were calculated. It was noted that enlargement of the two-phase region occurred when the concentration of salt increased in the initial aqueous phase. Adding salt to the system proved beneficial in separating furfuryl alcohol from water.