Distillation separates two or more liquid components in a mixture using the
principle of relative volatility or boiling points. The greater the difference in relative
volatility the greater the nonlinearity and the easier it is to separate the mixture
using distillation. The process involves production of vapour by boiling the liquid
mixture in a still and removal of the vapour from the still by condensation. Due to
differences in relative volatility or boiling points, the vapour is rich in light
components and the liquid is rich in heavy components.