Electric Fractional Distillation Plant, Voltage : 440V

When crude oil reaches the oil refinery it is a thick black, smelly liquid.  In this form, it is not much use to anyone.  Crude oil contains mixture of hydrocarbons.  At the refinery these are separated into fractions which are more useful. This is done by a process called fractional distillation. This process separates compounds by using the difference in boiling points.