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What is crude oil? Crude oil -.. What is crude oil? Crude oil - Oil we find underground

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What is crude oil?Crude oil -.

What is crude oil?Crude oil -Oil we find underground.

What is crude oil?Crude oil -Oil we find underground.

It is formed from partially decayed plants and animals, under mud, millions of years ago.

What is crude oil?Crude oil doesnt always look the same, it depends where its from.

It can vary from black to colourless.

What is crude oil?but usually it looks like thin, brown treacle.

Crude Oil formationDrilling for oilIn some places, rock traps oil so it cannot escape.Oil wells are drilled through the rock and the oil is pumped to the surface.

Drilling for oil

Separating crude oilCrude oil is made up of a mixture of hydrocarbons.Hydrocarbons are compounds that are made up of hydrogen and carbon atoms only.Because crude oil is a mixture, the long chains need to be separated before they are useful.

Separating crude oilThe hydrocarbons that make up the crude oil mixture vary in size. The larger the hydrocarbon the higher its boiling point.

Separation of crude oilThe hydrocarbons in crude oil are separated using fractional distillation.This happens at an oil refinery in a tower called a fractionating column.In the fractioning column the hydrocarbons in crude oil are separated as they have different boiling points.

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Heated Crude Oil350oC40oC

Liquid petroleum gasNaphthaPetrol (gasoline)ParaffinDieselFuel oilLubricating oilBitumenFractionBoiling pt.< 25oC25 60oC60 180oC180 220oC220 250oC250 300oC300 350oC> 350oCAverage number of C atoms in chain381012204080120The Fractional Distillation of Crude Oil13

Properties of the fractions14

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