Experimental Study On The Separation Of Azeotropic Mixtures Using Entrainer / Solvent In Othmer VLE Still
Non-ideal solutions often exhibit azeotropic behavior when the deviation from ideality becomes too high. Such mixtures need a separating agent to purify them in a distillation column with lesser number of plates. In the present study four binary azeotropes, viz., Tetrahydrafuran - Water, Ethylacetate - Ethanol, Cyclohexane - Ethylacetate and 1 proponal - Water have been experimentally investigated using separating agents. Experiments on distillation operations were carried out in an Othmer VLE still and the bottom and distillate products were subjected to analysis to estimate the composition of the mixtures. The results show that DMSO yielded maximum separation for the THF - Water system (82.27% recovery), MEK for Ethylacetate - Ethanol mixture (83.02%) , DMFA for Cyclohexane - Ethylacetate system (76.18%) and Iso butanol for 1 Proponal - Water mixture (76.21%). Of these, DMSO and MEK worked as solvents whereas DMFA and Iso - Butanol served as entrainers.