Question

Glycerol can be separated from spent-lye in soap industry by:

• A. crystallisation
• B. sublimation
• C. differential extraction
• D. chromatography
• E. distillation under reduced pressure

Answer 1

The correct option is E distillation under reduced pressure

Glycerol (B.P. 290°C) is separated from spent lye in the soap industry by distillation under reduced pressure, as for simple distillation very high temperature is required which might decompose the component.

Glycerol can be separated from spent-lye in soap industry by distillation under reduced pressure.