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GCSE Design and Technology · key term
Separation of a mixture such as crude oil into fractions using differences in boiling point.
Used by AQA
Paper 1
Revise: Primary material sourcesDuring refining, fractional distillation separates crude oil into fractions with different boiling ranges. The oil is heated, and substances condense at different temperatures. This separates the mixture; it does not turn the oil directly into plastic.
Distinguish fractional distillation, cracking and polymerisation: they separate, break down and join molecules respectively.
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