Residue Curve in a Ternary Equilateral Diagram
Consider a ternary mixture of chloroform, acetone, and methanol at . The vapor-liquid equilibrium (VLE) behavior is described by the modified Raoult's law with activity coefficients predicted by the Wilson model . This mixture presents four azeotropes, whose locations and boiling points are:[more]
This Demonstration plots the residue curve for user-selected positions of the locator (shown by a blue circle), which has to be inside the ternary equilateral diagram.[less]
 G. M. Wilson, "Vapor-Liquid Equilibrium XI: A New Expression for the Excess Free Energy of Mixing," Journal of the American Chemical Society, 86(2), 1964 pp. 127–130.