... is an important pillar of the national economy. Petroleum products, the blood is known as the national ... the metal powder, respiration and other causes of oil into the water, not only the oil pollution But also to ... 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 ...