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Residue Curve in a Ternary Equilateral Diagram

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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 [1]. This mixture presents four azeotropes, whose locations and boiling points are:

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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.

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Contributed by: Housam Binous and Brian G. Higgins (August 2011)
Open content licensed under CC BY-NC-SA

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Reference

[1] 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.

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