THERMODYNAMICS OF LEWIS ACID-BASE MIXTURES
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The associated perturbedanisotropicchain theory (APACT) has been applied to treat multicomponent mixtures, in which components exhibit Lewis acidbase interactions. Mixtures of amphoteric molecules (such as alcohols), acidic molecules (such as chloroform), and basic molecules (such as ketones) as well as nonassociating components (diluents) are treated. The acidbase version of the perturbedanisotropicchain theory (ABPACT) is a closed form equation of state that takes into account explicitly dispersion interactions, polar interactions, and hydrogen bonding interactions between components that selfassociate or solvate. The equation fits binary VLE mixtures quite accurately. Calculated results also are compared with those obtained from the PengRobinson equation of state, UNIFAC and the original APACT. In all cases where there are mixtures of associating components, the ABPACT gives a better fit of experimental data than these other equations. Copyright 1990 American Institute of Chemical Engineers