... is an important pillar of the national economy. Petroleum products, the blood is known as the national economy ... . 2.Background of the project:China's oil output of petroleum products account for about 20 percent, and ... vegetable oil, acid oil, heavy oil, lubricating , Alcohol, sulfonated oil, naphtha, paraffin, benzene, naphthalene, ketone.). Technological process:Take the crude oil through the oil ...