Question

Separating a maximum-boiling azeotrope using a light entrainer, this process is referred to as?

(a) Re-extractive distillation

(b) De-extractive distillation

(c) Extractive distillation

(d) Boil up distillation

I got this question by my school teacher while I was bunking the class.

Question is taken from Extractive Distillation topic in division Azeotropic and Extractive Distillation of Distillation Design

Answer 1

The correct answer is (a) Re-extractive distillation

For explanation I would say: The same extractive distillation scheme can in principle be applied to the symmetrical system of

separating a maximum-boiling azeotrope using a light entrainer and this process is referred to as re-extractive distillation.