…the action of purifying a liquid by a process of heating and cooling…
…distillation of a liquid in a current of steam, used especially to purify liquids that are not very volatile and are immiscible with water…
…a process whereby certain volatile substances vaporize in warm climates and condense in cooler areas, causing the accumulation of pollutants…
…distillation of a liquid under reduced pressure, enabling it to boil at a lower temperature than normal…
…decomposition of a solid by heating it in a closed container and collecting the volatile constituents given off…
…separation of a liquid mixture into fractions differing in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column…
