What is "salt-effect distillation"

n. (context chemistry physics English) a technique of extractive distillation in which a salt or a non-volatile liquid is added to the mixture being distilled in order to remove azeotropes and aid separation

Salt-effect distillation is a method of extractive distillation in which a salt is dissolved in the mixture of liquids to be distilled. The salt acts as a separating agent by raising the relative volatility of the mixture and by breaking any azeotropes that may otherwise form.