The main components of the liquefied petroleum gas obtained from the refinery are one or two of propane, propylene, butane, and butene, and it is also doped with a small amount of pentane, pentene and trace sulfide impurities. If you want to further purify the liquefied petroleum gas, you can use the alcohol amine absorption tower to absorb and remove the carbon oxysulfide, and finally wash the excess sulfide with alkali.

The liquefied gas obtained from natural gas contains almost no olefins. Liquefied petroleum gas is mainly composed of hydrocarbons, and its main components are propane, butane and other alkanes. Of course, there are also standards for the composition of liquefied petroleum gas. Not all substances of the composition can be called liquefied petroleum gas. only when the gas composition is more than 60% propane plus butane can it be used. It is called liquefied petroleum gas. Of course, not all standards are the same. In foreign countries, they are more particular about liquefied petroleum gas regulations. Its definition needs to be adjusted according to seasonal changes in the composition of propane and butane. However, as long as my country's liquefied petroleum gas is used in households, there is not so much attention to it. If it is to be used in industry, we need to formulate the composition standards of liquefied petroleum gas to further refine the ratio. The rules are [1].

Using liquefied petroleum gas as fuel, because of its high calorific value, no smoke, no carbon residue, and convenient operation and use, it has been widely used in people's lives. In addition, liquefied petroleum gas is also used for cutting metal, baking agricultural products and roasting in industrial kilns.