fractional distillation

fractional distillation

noun Chemistry.
the separation of volatile components of different boiling points in a mixture by the gradual increase of temperature and the separate collection of each component.

Origin:
1855–60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Fractional distillation is always a great word to know.
So is ethereal. Does it mean:
pertaining to, containing, or resembling ethyl ether
pertaining to compounds that are not hydrocarbons or their derivatives
Collins
World English Dictionary
fractional distillation
 
n
1.  the process of separating the constituents of a liquid mixture by heating it and condensing separately the components according to their different boiling points
2.  a distillation in which the vapour is brought into contact with a countercurrent of condensed liquid to increase the purity of the final products

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
fractional distillation  
A process by which a chemical compound is separated into components by distillation. In fractional distillation the compound is heated and, as each of its constituent components comes to a boil, its vapors are separated and cooled, so it can be removed in its pure form. Fractional distillation is used to refine petroleum. See also distillation.
The American Heritage® Science Dictionary
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