MEASUREMENT OF PHASE-EQUILIBRIUM IN MULTICOMPONENT SYSTEMS OF AROMATICS WITH N-METHYLPYRROLIDONE AND PREDICTIONS WITH UNIFAC

Liquid-liquid equilibrium (LLE) of five binary and five ternary systems containing the solvent N-methylpyrrolidone (NMP) with different paraffins and aromatics were measured. The data presented in this work were used in the estimation of UNIFAC model interaction parameters between NMP and the main groups: CH2, ACCH2, ACH and CHNA. The estimated interaction parameters of these groups were used in conjunction with other interaction parameters presented in the literature to predict the phase equilibrium of NMP with a synthetic multicomponent system composed of paraffins, condensed naphthenes, monoaromatics and diaromatics. The results compare favourably with the experimental data measured in this work. © 1990.