What is an azeotrope?
As we learned in physical chemistry, liquid mixtures when boiled, the composition of the vapor differs from that of the liquid: the more volatile component in the liquid, the more in the vapor phase. This behavior is described by Raoult’s law. However, there are mixtures that deviate from this general behavior: at certain compositions, the vapor-phase composition matches that of the liquid phase. Thus, these mixtures cannot be separated to components by simple distillation. This composition is called an azeotropic point, which typically corresponds to a minimum or maximum in the boiling temperature.
The composition of azeotropes is usually obtained from extensive handbooks or databases, as predicting them is a challenging task. Or is it not that difficult? Using the UNIFAC activity coefficient model, this page allows you to explore whether certain mixtures form azeotropes, and if so, at what composition. Give it a try!
Make your choice on Azeotrope.info
Predict azeotropic points of organic substances from binary up to quaternary mixtures, using VLE calculations with the UNIFAC model
Predict and depict the pressure dependence of the azeotropic points.
Other related pages
Visualize your azeotropic mixtures with VLE-diagrams.
Calculation of solubility of organic solids in pure or mixed solvents. Generation of solubility tables and charts, diagrams.
Azeotrope tables of common compounds (experimental data).
