Organic Chemistry – Some Basic Principles and Techniques

Organic Chemistry – Some Basic Principles and Techniques

Question

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

  • fractional distillation

  • steam distillation

  • distillation under reduced pressure

  • simple distillation

Answer

C.

distillation under reduced pressure

Glycerol with high boiling point (290oC) can be separated from spent lye by distillation under reduced pressure. This process is used to purify liquids having very high boiling points. By this process, the liquid is made to boil at a lower temperature than its boiling point by lowering the pressure on its surface.

More Chapters from Organic Chemistry – Some Basic Principles and Techniques