Petrochemical industry refers to the processing that produces petroleum products and petrochemical products by using oil and natural gas as raw materials.Generally refers to the chemical industry that uses oil and natural gas as raw materials.The crude oil under the process of craking, reforming, separation,butene, butadiene, benzene,toluene, xylene, naphthalene etc.From these basic raw materials, various basic organic raw material can be obtained, such as methanol, formaldehyde, ethanol, acetaldehyde, acetic acid, isopropanol, acetone, phenol and so on.