Distilat

Distilat, or distillate, is the liquid product obtained when a liquid mixture is subjected to distillation. Distillation relies on differences in boiling points to separate components: the more volatile components vaporize first, are carried with the vapor, and are condensed back into a liquid for collection.

Several distillation methods produce different types of distillates. Simple distillation handles liquids with wide boiling-point differences. Fractional distillation uses a column to improve separation for close-boiling components. Steam distillation allows heat-sensitive substances to be distilled at lower temperatures. Vacuum distillation lowers the boiling points by reducing pressure, enabling purification of volatile compounds that decompose at higher temperatures.

In practice, the term distillate applies across industries. In chemistry, it denotes the collected liquid fraction from a mixture. In petroleum refining, distillates are fuels and solvents obtained from crude oil within specific boiling ranges, such as naphtha, diesel, kerosene, and jet fuel. Distillates also occur in essential oil production and in the creation of alcoholic beverages, where the distillate contains the desired alcohol and aroma compounds. Distilled water is a common distillate used for laboratory and consumer purposes.

Properties of a distillate depend on the source material and the distillation method, including purity, presence of dissolved gases, and volatile impurities. The process yields a distillate fraction and a residue (the part that does not vaporize under the conditions used).

Etymology traces distillat to Latin distillare, meaning to drip or drop apart. Safety considerations include controlling flammable vapors, pressure, and containment to prevent exposure and environmental release.