In addition to the above-mentioned petroleum products, each refining device also obtains some products which are gases at normal temperature, collectively referred to as refinery gas, which can be directly used as fuel or pressurized liquefied to separate liquefied petroleum gas, which can be used as raw materials or chemical raw materials. There are many kinds of chemical raw materials provided by refineries, which are the raw material bases of organic chemical products. Various oils and refinery gases can be selected according to different production purposes and production processes. The gaseous raw materials under normal pressure mainly produce ethylene, propylene, synthetic ammonia, hydrogen, acetylene and carbon black. The liquid raw materials (liquefied petroleum gas, light gasoline, light diesel oil, heavy diesel oil) can be made into the most basic raw materials required for the development of petrochemical industry (except acetylene), which is the basis for the development of petrochemical industry. At present, crude oil is severely coked at high temperatures and cannot directly produce basic organic raw materials. The refinery is also a provider of important aromatics such as benzene, toluene and xylene. Finally, it should be noted that gasoline, aviation kerosene, and diesel fuel are more or less additive to improve the use and storage performance. The products produced by each refinery must be blended with additives and oils of different devices according to commodity standards before they can be used as commodities. Petroleum additives are used in small quantities and have high efficacy. They are chemically synthesized fine chemical products, which are necessary for the development of high-grade products and should be vigorously developed.
