Fractional distillation is a method of separating a liquid that can be evaporated from the 2 type or above. The principle of the same with normal distillation. Is to separate elements in solution to each other.But it will have the different from normal distillation . The fractional distillation is suitable for use as a component of the distilled liquid solution a little different boiling points . "in the process of a fractional distillation process. Will is the warmth of the each part to condensation.The other, which, compared with a simple distillation several times. The difference of the sequence with the distillation simple distillation, is located at the column. By columns of fractional distillation will look as I complex layers.No complications of the column.