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8426612 
Meetings & Symposia 
Models for infinite dilution activity coefficients in ternary liquid systems 
Islam, AW; Kabadi, VN 
2008 
New Orleans, LA 
2008 AIChE Spring National Meeting, Conference 
English 
The change in partition coefficient with concentration of solute in a liquid system consisting of two relatively immiscible solvents was studied. This would require a consistency between data for infinite dilution partition coefficients and ternary LLE data at finite concentrations of the solute. An attempt would be conducted to model the infinite dilution and finite concentration behavior of these systems by a single thermodynamic model. Ternary liquid-liquid equilibrium data for hexane + 1-butanol + water, carbon tetrachloride + propanoic acid + water, and water + propanoic acid + hexane were measured from very low concentrations of the solute to finite concentrations at 25°C. The measured partition coefficients exhibited good agreement with the literature values. UNIQUAC and modified UNIQUAC activity coefficient models were used to represent the data. This is an abstract of a paper presented at the AIChE Spring National Meeting (New Orleans, LA 4/6-10/2008).