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English definition of “fractional distillation”

fractional distillation

noun [U] uk   /ˌfræk.ʃən.əl.dɪs.tɪˈleɪ.ʃən/ specialized us  
the chemical process of separating different substances that have different boiling points by heating a liquid mixture until it turns into gas and then cooling and collecting each substance separately
(Definition of fractional distillation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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