The Chlorination Of Vinyl Chloride

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 reaction of aromatic ketones with bis trichloromethyl carbonate afforded aryl z vinyl chlorides in the presence of scandium triflate dmf and benzoyl chloride as catalysts. About 13 billion kilograms are produced annually.

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Direct Chlorination Method Process Diagram

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Vinyl chloride is an organochloride with the formula h2c chcl that is also called vinyl chloride monomer or chloroethene.

The chlorination of vinyl chloride.

Samples of chlorinated poly vinyl chloride cpvc and chlorinated β β dideuterated poly vinyl chloride β β d2 cpvc were prepared under identical reaction conditions. The microstructure of cpvc and β β d2 cpvc was characterized by a combination of 1h nmr 13c nmr spectroscopy and analytically determined chlorine content. 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.

This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride. Vcm is among the top twenty largest petrochemicals in world production. Direct chlorination ch 2ch 2 cl 2 clch 2ch 2cl edc oxychlorination ch 2ch 2 2 hcl o 2 edc h 2o edc pyrolysis 2 edc 2 ch 2chcl vcm 2 hcl overall reaction 2 ch 2ch 2 cl 2 o 2 2 ch 2chcl h 2o balanced process for vinyl chloride production no generation of hcl. The five main processes used in the production of vinyl chloride monomer vcm are.

The united states currently remains the largest vcm manufacturing region because of its low production cost position in chlorine and ethylen. In one ethylene is converted to 1 2 dichloroethane ethylene chloride by reaction with chlorine. This catalytic method enables a green route to aryl z vinyl chlorides. A plausible addition elimination mechanism is proposed.