Abstract
—Separation of azeotropic solution by simple distillation requires third column to remove the added entrainer, but it is not cost effective and energy effective process. Hence to overcome this difficulty, a salt effect on vapour liquid equilibrium (VLE) relationship is provided as a potential technique of extractive distillation for azeotropic system. In the present study, the comparative effect of zinc chloride and cobalt nitrate on ethyl acetate–ethanol system at atmospheric pressure of 760mmHg has been studied. Moreover, linear relationship between salt concentration and relative volatilities has been reported.