Vinyl Chloride From Ethylene

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.

Vinyl chloride from 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. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound. Hence to save the processing cost for manufacturing ethylene numerous attempts have been made to convert ethane directly to 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.

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. Ethylene is made from ethane by cracking ethane and then ethylene is used for production of vinyl chloride. These processes are shown in figure 1. 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. Ethylene vinyl chloride evcl emulsion is the copolymer of ethylene and vinyl chloride with amide functional group. 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 purified ethylene dichloride undergoes selective cracking to form vinyl chloride.

Production of vinyl chloride from ethylene today vinyl chloride is almost exclusively manufactured by thermal cleavage dehydrochlorination of 1 2 dichloroethane edc. The feedstock for the thermolysis can be obtained from two routes. Ethylene first reacts with chlorine to produce ethylene dichloride. 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. 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. The major industrial preparation of vinyl chloride begins with ethylene and has two variants.