what is the main purpose of petroleum refining?
Petroleum products are primarily used as fuels.SOme chemicals obtained from petroleum used to make medicines,ointements and cosmetics. Further fractional distillation yields chemicals which are used to manufacture plastics,synthetic rubber, synthetic fibres and Explosives!
The various hydrocarbons present in petroleum have different boiling points. as the number of carbon atoms in a hydrogen increases,it's boiling point also increases.This property is used to separate the different components of petroleum by fractional distillation.The components with different boiling points are known as fractions, and the process of separating the fractions by fractional distillation is known as refining.