Vinyl Chloride From Ethylene

Production of vinyl chloride from ethylene today vinyl chloride is almost exclusively manufactured by thermal cleavage dehydrochlorination of 1 2 dichloroethane edc.

Vinyl chloride from ethylene. 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. 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 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. In one ethylene is converted to 1 2 dichloroethane ethylene chloride by reaction with chlorine.

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. Method for preparing vinyl chloride from ethylene is carried out by the oxidehydrochlorination reaction. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound. The liquid stream from the quench tower as well as the condenser is fed to the vinyl still which produces the vinyl chloride product.

The feedstock for the thermolysis can be obtained from two routes. Vcm is a major commodity chemical mainly used in the production of the polymer. 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.

Hence to save the processing cost for manufacturing ethylene numerous attempts have been made to convert ethane directly to vinyl chloride. These processes are shown in figure 1. 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. Heating 1 2 dichloroethane in the presence of a charcoal catalyst gives vinyl chloride.

The major industrial preparation of vinyl chloride begins with ethylene and has two variants. The five main processes used in the production of vinyl chloride monomer vcm are. Ethylene vinyl chloride evcl emulsion is the copolymer of ethylene and vinyl chloride with amide functional group.