LPG is liquefied petroleum gas . Due to the rapid development of the petrochemical industry, liquefied natural gas , as a key chemical raw material, is also a new energy source . In the chemical industry, liquefied petroleum gas is a by-product produced by refineries in the process of petroleum catalysis and cracking.
Liquefied petroleum gas is a colorless, volatile liquid obtained by pressurizing and cooling natural gas or oil in refineries, and is very prone to spontaneous combustion. When the content of liquefied petroleum gas in the air reaches a certain concentration range, it will explode when exposed to an open flame.
LPG obtained from refineries consists primarily of propane , propylene, butane and one or two butenes, mixed with small amounts of pentane, pentenes and trace sulfide impurities.
If further purification of LPG is required, amine absorbers can be used to absorb and remove carbon oxysulfides, and excess sulfides can be washed away with alkali.