Distillation is the separation of the liquid can evaporate. That contains elements from the 2. A simple distillation is used for the distillation of a mixture of liquids with different boiling point very much.
Distillation to separate liquid can evaporate. Which contains elements from two or more conventional refinery for refining the mixture in a liquid. Very different boiling points
Distillation is to separate the liquid can be evaporated, which has since 2 elements above. Simple distillation is suitable for use in fluid mixtures with distilled as many different boiling points.