Editing Distillation (section)

===Pressure-swing distillation===
{{further|Azeotrope#Pressure swing distillation}}

Pressure-swing distillation is essentially the same as the unidirectional distillation used to break azeotropic mixtures, but here both [[Azeotrope#Pressure swing distillation|positive and negative pressures may be employed]].

This improves the selectivity of the distillation and allows a chemist to optimize distillation by avoiding extremes of pressure and temperature that waste energy. This is particularly important in commercial applications.

One example of the application of pressure-swing distillation is during the industrial purification of [[ethyl acetate]] after its catalytic synthesis from [[ethanol]].