Liquid-liquid equilibrium data in aqueous solution of lactic acid with isoamyl alcohol

In this study, the experimental and correlated tie line data for the (water + lactic acid + isoamyl alcohol) system were investigated at T = 298.15 K and atmospheric pressure. The cloud-point titration method was used to determine solubility data. The studied ternary system exhibits type-1 behaviour of LLE. The tie line data were determined by acidimetric titration, the Karl-Fischer technique, and refractive index measurements. Distribution coefficients and separation factors were calculated over the immiscibility region. The UNIQUAC and NRTL models were used to correlate the experimental data. The reliability of data was determined through the Othmer-Tobias equation.

Keywords:

Liquid-liquid equilibrium , Lactic Acid , UNIQUAC model , NRTL model