The petroleum industry refers to the chemical industry that uses oil and natural gas as raw materials. The range is very wide and there are many products. The crude oil is subjected to cracking, reforming and separation to provide basic raw materials such as ethylene, propylene, butene, butadiene, benzene, toluene, xylene, naphthalene. From these basic raw materials, various basic organic raw materials such as methanol, formaldehyde, ethanol, acetaldehyde, acetic acid, isopropanol, acetone, phenol, etc. can be obtained.

Natural gas refers to all-natural gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcanic gas, coalbed methane, and bio-generated gas).

The chemical industry is the general term for enterprises and units engaged in the production and development of the chemical industry. The penetration of various aspects of the chemical industry is an indispensable part of the national economy. Its development is an important practical significance for the economic and social development of human beings.

The power industry converts primary energy such as coal, oil, natural gas, nuclear fuel, hydropower, ocean energy, wind energy, solar energy, and biomass energy into electrical energy through power generation facilities, and then supplies users as an energy industry through transmission, transformation, and distribution systems. department.