You asked: How many fractions are in crude oil?

Fraction: No. of carbon atoms: Uses:
Refinery gas 1 – 4 Gaseous fuel, making chemicals.
Gasoline (petrol) 4 – 12 Motor car fuel, making chemicals.
Kerosine (paraffin) 11 – 15 Heating fuel, jet fuel.
Diesel oil 15 – 19 Diesel fuel for lorries, trains, etc. and heating fuel.

How do you remember the fractions of crude oil?

Crude oil fractions

One way to remember the names of the fractions is: Lazy Penguins Keep Drinking Hot Beer.

What are crude fractions?

A crude oil fraction is a component of crude oil, which has its own particular molecular composition, weight, and boiling point. The first step in the refining process is the separation of crude oil into various crude oil fractions. Heavy crude oil fractions can be cracked to yield lighter, more valuable products.

Are crude oil fractions pure?

Crude oil is a mixture of hydrocarbons . … The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column. Each fraction contains hydrocarbon molecules with a similar number of carbon atoms and a similar range of boiling points.

What are the 6 fractions of crude oil?

Fractional distillation of crude oil

Fraction: No. of carbon atoms: Uses:
Refinery gas 1 – 4 Gaseous fuel, making chemicals.
Gasoline (petrol) 4 – 12 Motor car fuel, making chemicals.
Kerosine (paraffin) 11 – 15 Heating fuel, jet fuel.
Diesel oil 15 – 19 Diesel fuel for lorries, trains, etc. and heating fuel.
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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.

Why is crude oil heated?

Process: Intense heat is used to break down the heaviest hydrocarbon molecules that have emerged from the bottom of the distillation column. Thermal conversion, or coking, puts these residuals under intense heat and pressure to break down or ‘crack’, large hydrocarbon molecules into smaller molecules.

What are two conditions needed for cracking?

Thermal cracking uses harsh conditions like high temperature and high pressure. It breaks the alkanes into a high percentage of alkenes and comparatively few alkanes. Thermal cracking is done at about 1,000 degrees Celcius and 70 atm pressure.

How is petrol removed from crude oil?

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 .

Which parts of crude oil have the lowest boiling points the highest?

Fractional distillation

  • During the fractional distillation of crude oil:
  • The longest hydrocarbons have very high boiling points. …
  • Shorter hydrocarbon molecules have weaker intermolecular forces and lower boiling points. …
  • The shortest hydrocarbons have very low boiling points.
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