Bitumen

A lot of bitumen is also found buried in sand in Canada. It is too thick and sticky to flow through pipelines. It has to be mined by digging or by heating it with steam. This melt it while it is still underground.

Bitumen is a tar-like substance. It is one of the things we get from crude oil in an oil refinery. It is made from the residue left in   oil is a mixture of lots of compounds - mainly . Fractional distillation splits the crude oil into simpler mixtures called fractions. The different are taken out of the still at different