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1 of 4 © Boardworks Ltd 2011 Fractional Distillation

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1 of 4 © Boardworks Ltd 2011

Fractional Distillation

2 of 4 © Boardworks Ltd 2011

How does fractional distillation work?

3 of 4 © Boardworks Ltd 2011

Forces between molecules

4 of 4 © Boardworks Ltd 2011

Fractional distillation in the lab

The principle of how fractional distillation can be used to separate crude oil can be demonstrated in the laboratory by heating crude oil and collecting the vapour produced at different temperatures.

mineral wool soaked in crude oil

cooling water

fractions collected previously (at lower

temperatures)