Estimation of Liquid–Liquid Phase Equilibrium Data for Multicomponent Systems: Salting Effect & Simulated Annealing Algorithm

Although quaternary mixtures are frequently encountered in (liquid + liquid) extractionprocesses there is a considerable current interest in the using suitable mixed solvents forextracting acids from mixtures. Following our previous studies on salting effect of 10% NaCland 10% CaCl2 on LLE data for two quaternary systems (water + acetic acid + organicsolvent [diethyl ketone 25% + isobutyl methyl ketone 75%] or [diethyl ketone 50% +isobutyl methyl ketone 50%)] on extraction of acetic acid from aqueous mixtures [1] In thiswork, twelve binary interaction parameters for these systems were estimated based on NRTLmodel and simulated annealing algorithm (SA), in MATLAB programming.