Distilled water is produced by a process of distillation. A distilled beverage is a beverage containing ethanol that has been purified by distillation. Water purification is to be supplied by distillation and reverse osmosis. It is industrially produced by cryogenic fractional distillation of liquefied air. Argon is produced industrially by the fractional distillation of liquid air. It is commercially extracted by the fractional distillation of liquid air. The acetaldehyde is purified by extractive distillation followed by fractional distillation. It is one of the processes assumed to accompany pyrolysis and destructive distillation. It is produced industrially by fractional distillation of liquid air. Ethanol is subsequently isolated and purified by a combination of adsorption and distillation. Purity was improved by further distillation of the condensate. "Bitumen" refers to the liquid derived from the heavy-residues from crude oil distillation. In a subsequent distillation, the product ammonia is purified. Town gas is a flammable gaseous fuel made by the destructive distillation of coal. These pinenes are separated and purified by distillation.