The crude oil in the refinery is distilled into its components and due to the difference in boiling points in different parts of the tower, the crude oil is separated from each other. In the initial distillation process (distillation at ambient pressure) some heavy material remains in the bottom of the tower which is transferred to the distillation towers in vacuum and its various components are separated by vacuum distillation. The rest of the tower, known as Vacuum Batum, is used to make...