In this Demonstration, DSMO is used as an entrainer in an extractive distillation column. The column has 41 plates, a partial reboiler, and a total condenser. This column has an upper feed entering the column at plate 5 and containing pure DSMO with a flow rate of 1708 mol/min. The column has also a lower feed entering the column at plate 25 and containing mole isopropanol and mole water. This lower feed has a flow rate of 1666 mol/min. You can set the reflux and reboil ratios, and . For and , the distillate obtained is almost pure isopropanol ( mole %) and the bottom is a mixture of water mole %) and DSMO mole %), which can be easily separated in a second distillation column—the entrainer regeneration column.