This study presents the application of ternary phase diagrams to tropical almond biodiesel
components separation and purification at two temperatures. The seed oil was extracted
mechanically and alkaline transesterified to produce biodiesel. The oil and biodiesel were
characterized using standard methods. Tie lines and binodal solubility curve data were
determined using modified cloud point titration procedures. Gas chromatographic method was
employed in the analysis of the phase compositions. The mixture of biodiesel, methanol and
glycerol were investigated at 20 °C, 30 °C and withdrawal times of 2 to 32 minutes at 2 minutes
intervals. Distribution coefficient, K and solvent selectivity, S analysis were performed. Results
obtained showed that S > 1 indicating the ability of methanol to promote phase separation and
purification. K < 1 implying that there was lower quantities of methanol solubilized in the
biodiesel phase. The ternary phase diagrams provided the means of predicting the components
distribution.