In our former papers the batch extractive distillation (BED) was investigated under constant reflux ratio (R=const.). In a BED process the mole fraction of the more volatile component (MVC) in the distillate x(d,A), can be influenced not only by the variation of R but also by changing the flow rate of the solvent (F). Several operational policies were developed, and these policies were studied by simulation (on the example of the mixture acetone-methanol + water) and compared. The x(d,a)=const. policies gave Lower recoveries than the original R=const. policy. This latter policy was modified by shortening the second preparatory step of the BED (R=infinity, F>0). The effectiveness of this modified policy was also experimentally verified. Finally this modified R=const. policy was combined with the x(d,A)=const. policy maintaining a high value of x(d,A) for a longer period during the production of the MVC by gradually increasing R or F or R and F simultaneously.