Plant oils

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Extracting vegetable oil

some seeds, nuts and fruits are rich in vegetable oils

the oils can be extracted by crushing and pressing the plant material, followed by removing water and other impurites

some oils are extracted by distilling the plant material mixed with water 

this produces a mixture of oil and water from which the oil can be seperated

vegetable oils release a lot of energy when they burn in the air and so can be used as fuels

they are used to make biofuels such as biodiesel

the molecules in vegetable oils have hydrocarbon chains

those with carbon-carbon bonds (C=C) are unsaturated

if there are several double bonds…

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