Abstract
Vapor-liquid equilibrium data for the binary systems β-pinene + limonene and β-pinene + p-cymene were determined at atmospheric pressure in an Othmer equilibrium still. Vapor pressures of pure components were measured and the data correlated with the Antoine equation. Parameters for the Van-Laar, Margules, Wilson, NRTL and UNIQUAC equations were calculated with the aid of a Nelder - Mead technique to minimize an objective function based on the total pressure. Predictions with the UNIFAC method were also obtained.
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