Fractional Distillation Flashcards
1
Q
The fractionating column is…
A
hotter at the bottom and colder at the top
2
Q
How does fractional distillation work?
A
- heated crude oil vapours enter column
- vapours rise until their boiling point when they CONDENSE
- different vapours condense at different heights - due to different BPs
- similar vapours condense together as a fraction
3
Q
What are fractions?
A
mixtures containing the hydrocarbons that boil in a particular temperature range
