Vinyl Chloride From Ethylene

The feedstock for the thermolysis can be obtained from two routes.

Vinyl chloride from ethylene.

Method for preparing vinyl chloride from ethylene is carried out by the oxidehydrochlorination reaction. Invention relates to a method for preparing vinyl chloride monomer and to a catalyst sued in catalytic preparing vinyl chloride monomer from flows comprising ethylene. Production of vinyl chloride from ethylene today vinyl chloride is almost exclusively manufactured by thermal cleavage dehydrochlorination of 1 2 dichloroethane edc. The liquid stream from the quench tower as well as the condenser is fed to the vinyl still which produces the vinyl chloride product.

Hence to save the processing cost for manufacturing ethylene numerous attempts have been made to convert ethane directly to vinyl chloride. The five main processes used in the production of vinyl chloride monomer vcm are. Heating 1 2 dichloroethane in the presence of a charcoal catalyst gives vinyl chloride. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.

As there is vinyl chloride in the polymer s backbone the emulsion possesses excellent characteristics such as excellent flame retardancy and water alkaline resistance. In one ethylene is converted to 1 2 dichloroethane ethylene chloride by reaction with chlorine. These processes are shown in figure 1. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound.

The major industrial preparation of vinyl chloride begins with ethylene and has two variants. Ethylene vinyl chloride evcl emulsion is the copolymer of ethylene and vinyl chloride with amide functional group. Ethylene is made from ethane by cracking ethane and then ethylene is used for production of vinyl chloride. The gases from the quench tower then enter a partial condenser which produces hcl as a gas and the liquid stream consisting of vinyl chloride unreacted ethylene dichloride and polychlorides.

Ethylene first reacts with chlorine to produce ethylene dichloride. 1 direct chlorination of ethylene to form edc 2 oxychlorination of ethylene to form from recycled hcl and oxygen 3 purification of edc 4 thermal cracking of edc to form vcm and hcl and 5 the purification of vcm. Vcm is a major commodity chemical mainly used in the production of the polymer.