PVC is one of the materials are important in our lives there are many methods for producing PVC but today the primary method is to go from raw materials ethylene and chlorine The process is described as follows: First, crude oil fractionation into different cuts such as naphtha, kerosene, LGO, HGO and residue The cuts important of PVC production process that is naphtha naphtha used for steam cracking process to produce ethylene and other olefins some Ethylene is separated from the product mixture to produce EDC carried away by the reaction of ethylene and chlorine the reaction is catalyzed by FeCl3, CuCl2 or SbCl3 at 40-70 degrees C and bar then, the EDC is converted to VC by thermal cracking in a completely radical chain process at 500-600 ° C and 2.5-3.5 MPa finally, vc through polymerisation process to produce PVC Vietnam now has in joint venture production of PVC with a total output of up to 200,000 tonnes / year are manufactured by means of suspension some typical PVC manufacturers today as Chisso corp with capacity of million tons / year, Vinnolit and IBV with the capacity of 1.2 million tons / year