In this research, experimental solubility and
liquid-liquid equilibrium (LLE) data for (water + propionic
acid + 1-hexanol) ternary system were obtained at T =
298.2K and p = 101.3kPa for the first time. LLE data for
extraction of organic acids from water are important in
evaluation of industrial extraction processes. The precise
LLE data are always needed for efficient separation
operations, which can be obtained from direct
measurements. The consistency of the experimental tie-line
data was determined through the Othmer–Tobias and Hand
correlation equations for the system. The experimental tieline
data were compared with those calculated by the
UNIQUAC and NRTL models
