Question

The distillation technique most suited for separating glycerol from spent - lye in the soap industry is :

• A. Fractional distillation
• B. Steam distillation
• C. Distillation under reduced pressure
• D. Simple distillation

Answer 1

The correct option is C

Distillation under reduced pressure

As glycerol decomposes before reaching its boiling point under 1 atm pressure. So, in order to prevent its decomposition, it is distilled under reduced pressure.