Diagram showing the process of fractional distillation to separate crude oil in a fractionating column
As you move up a fractionating column the temperature decreases, so the compounds with higher boiling points come off lower down the column.
Trend in Boiling Point of the Main Fractions
Uses of Crude Oil Fractions
You need to learn the names and uses of the main fractions obtained from crude oil: refinery gases(also known as liquid petroleum gases), gasoline, kerosene, diesel, fuel oil and bitumen. Gasoline and petrol are the same thing; gasoline is the term used in the USA.