Chlorine EDC pyrolysis

Ethylene dichloride (EDC) is used to manufacture vinyl chloride monomer (VCM), which is one of the largest commodity chemicals produced in the world. EDC may be produced by the direct chlorination of ethylene or oxychlorination of ethylene in the presence of oxygen and hydrogen chloride. Pyrolysis of EDC produces VCM and an equal amount of hydrogen chloride as a co-product. This hydrogen chloride produced in the pyrolysis reactor is utilized by the oxychlorination process as one of the reactants. Therefore, the component processes of direct chlorination, EDC pyrolysis and oxychlorination are combined to develop a balanced process for the production of VCM with no net consumption or production of hydrogen chloride ... 

Monsanto and MW Kellogg have entered into an agreement to offer technology for VCM plants. The process combines Monsanto s direct chlorination, EDC pyrolysis and purification technology with Kellogg s Kel-Chlor technology for making chlorine from hydrochloric acid. The Kel-Chlor step replaces the oxychlorination section of a conventional balanced process and the chlorine product is sent to the direct chlorination reactor for conversion to EDC. 

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