Separation of azeotropic mixture (acetone + n-heptane) by extractive distillation with intermediate and heavy boiling entrainers: Vapour-liquid equilibrium measurements and correlation

Acetone and n-heptane are widely applied in pharmaceutical industry as benign solvents and are observed in the wastewater. Because acetone and n-hexane can form an azeotropic mixture, it is impossible to recover acetone and n-heptane with high purity from the wastewater using conventional distillation. In this research, for separating the azeotrope (acetone + n-heptane) by homogeneous extractive distillation, 1-chlorobutane and butyl propanoate...