Vinyl Chloride From Ethylene

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.

Vinyl chloride from 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. Production of vinyl chloride from ethylene today vinyl chloride is almost exclusively manufactured by thermal cleavage dehydrochlorination of 1 2 dichloroethane edc. The purified ethylene dichloride undergoes selective cracking to form vinyl chloride. 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.

Vcm is a major commodity chemical mainly used in the production of the polymer. Ethylene first reacts with chlorine to produce ethylene dichloride. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used. These processes are shown in figure 1.

As there is vinyl chloride in the polymer s backbone the emulsion possesses excellent characteristics such as excellent flame retardancy and water alkaline resistance. Heating 1 2 dichloroethane in the presence of a charcoal catalyst gives vinyl chloride. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound. The feedstock for the thermolysis can be obtained from two routes.

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. 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. Hence to save the processing cost for manufacturing ethylene numerous attempts have been made to convert ethane directly to vinyl chloride.

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