How is crude oil separated into fractions BBC Bitesize?

Fractional distillation separates a mixture into a number of different parts, called fractions. A tall fractionating column is fitted above the mixture, with several condensers coming off at different heights. … The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column.

How is crude oil separated into fractions?

Fractional distillation is used to separate crude oil into simpler, more useful fractions. A fraction of crude oil is a group of hydrocarbon molecules of similar size with similar boiling points . Their similar boiling points mean that they can be separated by fractional distillation.

How do you separate crude oil into fractions in a school laboratory?

Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points .

What are the fractions of crude oil?

Fractional distillation of crude oil

Fraction: No. of carbon atoms: Boiling point range oC:
Gasoline (petrol) 4 – 12 32-160oC
Kerosine (paraffin) 11 – 15 160-250oC
Diesel oil 15 – 19 220-350oC
Residue lubricating oil heavy fuel oil bitumen C Above 350oC

How is crude oil separated into fractions 6 marks?

Crude oil is separated into fractions in a process called fraction distillation. The crude oil mixture is separated in a distillation column. The column is hot at the bottom and cool at the top. Fractional distillation works because the different compounds within the crude oil mixture have different boiling points.

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How do you separate petrol and diesel from crude oil?

Petroleum can be separated into various types of fuel, by a process called refining, using fractional distillation. Petrol, Diesel and Kerosene are all products (or fractions) of the process of refining Petroleum. On an industrial scale, the different fractions of Petroleum are separated out by fractional distillation.

Are fractions of crude oil mixtures?

Fractional distillation separates a mixture into a number of different parts, called fractions. Crude oil is a mixture of hydrocarbons . … The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column.

Which fraction is the most flammable?

Oil fractions

  • lower boiling points.
  • lower viscosity (they flow more easily)
  • higher flammability (they ignite more easily)

What are 6 products that crude oil is used to produce?

Products made from crude oil

These petroleum products include gasoline, distillates such as diesel fuel and heating oil, jet fuel, petrochemical feedstocks, waxes, lubricating oils, and asphalt.

Why is crude oil useless without refining?

The answer is no, because each crude oil is very different and made up of a large number of hydrocarbon. … Crude oil is a highly variable mixture of heavy and light hydrocarbons that need to be separated in a refinery to turn them into usable products.

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