Petroleum: Refining (OG-10)
Distillation first takes place in tall fractionating towers. Crude oil, heated to about 800o F, is largely vaporized as it enters the tower and rises through holes in horizontal trays. The rising vapors are cooled, and different fractions are condensed and withdrawn as liquids. Some fractions become asphalt, heavy fuel oil, kerosene and gasoline. Other fractions are used for plastics, fertilizers, and various chemicals.
Our Hoosier State Beneath Us: Oil and Gas