Distillation has use today in many applications including in purifying water, alcohol distilleries, and for making foods like jellies. Distillation is the chemical process of boiling a product to remove impurities and as a means of identification of an unknown substance. The boiling point of a product is one of the ways to identify the contents of a compound.
Distillation is a process used for centuries to refine a substance to a useful product. The impurities in the compound burn off in the process of purification. In water purification, water heats to the boiling point and the vapor collects for the pure mineral. In solar distillation of water, a simple still can heat the water placed in the sun. The vapor from the distillation will be mineral and salt-free.