DETERMINATION, CORRELATION AND PREDICTION OF LIQUID-LIQUID EQUILIBRIUM DATA OF n- BUTYL ALCOHOL-WATER-BUTYL ACETATE TERNARY SYSTEM.

Liquid-liquid equilibrium (LLE) data have been determined for the n-butyl alcohol-water-butyl acetate ternary system and the related binary systems at 293. 15, 303. 15 and 313. 15 K. The experimentally determined LLE data for the n-butyl alcohol-water binary system has been found to be in satisfactory agreement with the available literature data. The correlation and prediction of the LLE data has been done by using NRTL and UNIQUAC models. The model parameters of binary systems have been identified with a thermodynamic criterion. In the correlation of ternary LLE data, two objective functions (mole fraction and distribution constant) have been used for purpose of comparison. The effect of weighting in the first objective function has been examined. In predicting the ternary LLE with different sets of parameter values obtained for each of the constitutent binary systems, improved prediction results have been obtained by comparing the results of different combinations of the sets of parameter values and choosing those giving the best result.