LPG
LPG is leuco and volatil hydrogen which through pressurized, cooling and liquefied of natural gas or refinery gas. The main components are propane, propylene, butane, butene and less pentane.
LPG is separated into ethylene, propylene, butene and butadiene. Its main usage is to produce resin, synthetic rubber, fiber and medicine, explosive, and also could be used as civil fuel oil.