Vinyl Chloride From Ethylene

Ethylene vinyl chloride evcl emulsion is the copolymer of ethylene and vinyl chloride with amide functional group.

Vinyl chloride from ethylene.

There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used. 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. Method for preparing vinyl chloride from ethylene is carried out by the oxidehydrochlorination reaction.

In one ethylene is converted to 1 2 dichloroethane ethylene chloride by reaction with chlorine. 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. Vinyl chloride also known as vinyl chloride monomer vcm and chloroethene is an organochloride compound. Vcm is a major commodity chemical mainly used in the production of the polymer.

The five main processes used in the production of vinyl chloride monomer vcm are. The feedstock for the thermolysis can be obtained from two routes. As there is vinyl chloride in the polymer s backbone the emulsion possesses excellent characteristics such as excellent flame retardancy and water alkaline resistance. 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 first reacts with chlorine to produce ethylene dichloride. 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 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 is made from ethane by cracking ethane and then ethylene is used for production of vinyl chloride.

Heating 1 2 dichloroethane in the presence of a charcoal catalyst gives 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. The purified ethylene dichloride undergoes selective cracking to form vinyl chloride.