The main components of liquefied petroleum gas are propane , propylene, butane , butene, etc., and are also doped with a small amount of pentane, pentene and a small amount of sulfide impurities. LPG is a colorless, volatile liquid obtained by pressurizing and cooling natural gas or oil to liquefy in a refinery. It is often used as a raw material in the petrochemical industry, as a low-temperature extraction solvent in subcritical biotechnology, and as a fuel.
LPG is prone to spontaneous combustion. When its content in the air reaches a certain concentration range, it can explode in case of an open flame.
With the development of petrochemical industry , liquefied petroleum gas, as a basic chemical raw material and new fuel, has been paid more and more attention by people. In terms of chemical production, LPG is a by-product obtained by refineries during the catalytic and thermal cracking of crude oil .