Vinyl Chloride From Ethylene

The major industrial preparation of vinyl chloride begins with ethylene and has two variants.

Vinyl chloride from ethylene.

Ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate the weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. Heating 1 2 dichloroethane in the presence of a charcoal catalyst gives vinyl chloride. Ethylene first reacts with chlorine to produce ethylene dichloride. These processes are shown in figure 1.

Ethylene is made from ethane by cracking ethane and then ethylene is used for production of vinyl chloride. The liquid stream from the quench tower as well as the condenser is fed to the vinyl still which produces the vinyl chloride product. Ethylene vinyl chloride evcl emulsion is the copolymer of ethylene and vinyl chloride with amide functional group. Production of vinyl chloride from ethylene today vinyl chloride is almost exclusively manufactured by thermal cleavage dehydrochlorination of 1 2 dichloroethane edc.

At room temperature vcm is a gas with a sweet ethereal odor but in industrial processes it is most often handled as a liquid melting point 13 c. 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. 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. The purified ethylene dichloride undergoes selective cracking to form 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. The feedstock for the thermolysis can be obtained from two routes. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound. As there is vinyl chloride in the polymer s backbone the emulsion possesses excellent characteristics such as excellent flame retardancy and water alkaline resistance.

The five main processes used in the production of vinyl chloride monomer vcm are. In one ethylene is converted to 1 2 dichloroethane ethylene chloride by reaction with chlorine. Method for preparing vinyl chloride from ethylene is carried out by the oxidehydrochlorination reaction.