Sharpness of Separation by Batch Distillations

In the earlier paper3), the total reflux distillation by using a large-sized overflow vessel was introduced as a method of batch distillation. In the present paper, the sharpness of separation by the total reflux distllation stated above is compared with that by the usual batch reflux distillation having finite reflux ratio.Figs. 6 & 7 thru Fig. 9 show experimental results of the total reflux distillation and those of the finite reflux ratio distillation. The results of experiments are summarized as shown in Fig. 12, where it is observed that the sharpness of separation by the total reflux distillation under the low hold up is equal to that by finite reflux ratio distillation operated under the high reflux ratio.