fractional distillation

Fractional distillation is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which several fractions of the compound will evaporate. It is a special type of distillation. Generally the component parts boil at less than 25°C from each other under a pressure of one atmosphere (ATM). If the difference in boiling points is greater than 25°C, a simple distillation is used.
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Noun
1. fractionation of a liquid by distillation
(hypernym) fractionation, fractional process

Compare with distillation .A technique for separation of liquid mixtures by distillation that uses a tower attached to a flask containing the mixture to perform multiple distillations. Vapor moving up the column condenses on packing material inside the column, trickles down the column, and again vaporises. The more volatile component can then be drawn off at the top of the component, while the less volatile component remains at the bottom.

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Eng: fractional distillation
Urdu: جُزوی کشید ۔ کِسی مُرکَّب سے ایسے اجزا کو علیحدہ کرنا جِن کے نُقطہ جوش الگ الگ ہوں ۔