On the use of the NRTL method for calculation of liquid-liquid equilibria in ternary systems

application of the nrtl method to experimental data obtained on several systems at different temperatures shows that the energy parameter set that minimizes the objective function at a given temperature, t1, can be used for estimating phase compositions at other t values without serious error. it is concluded that this approach should be preferred to the use of interpolated or extrapolated gij values.