Distillation

Dis`til*la"tion

(ds`tl*l"shn), n. [F. distillation, L. destillatio.] 1. The act of falling in drops, or the act of pouring out in drops.
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2. That which falls in drops. [R.] Johnson
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3. (Chem.) The separation of the volatile parts of a substance from the more fixed; specifically, the operation of driving off gas or vapor from volatile liquids or solids, by heat in a retort or still, and the condensation of the products as far as possible by a cool receiver, alembic, or condenser; rectification; vaporization; condensation; as, the distillation of illuminating gas and coal, of alcohol from sour mash, or of boric acid in steam.
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The evaporation of water, its condensation into clouds, and its precipitation as rain, dew, frost, snow, or hail, is an illustration of natural distillation.
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4. The substance extracted by distilling. Shak.
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Destructive distillation (Chem.), the distillation, especially of complex solid substances, so that the ultimate constituents are separated or evolved in new compounds, -- usually requiring a high degree of heat; as, the destructive distillation of soft coal or of wood. -- Dry distillation, the distillation of substances by themselves, or without the addition of water or of other volatile solvent; as, the dry distillation of citric acid. -- Fractional distillation. (Chem.) See under Fractional.
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Sat 15th December 2018