Manufacture of 1,2-dichloroethane to produce vinyl chloride, by subjecting hydrocarbon source to cracking, conveying fractions to (oxy)chlorination reactor, separating 1,2-dichloroethane, and subjecting heavy fraction to pyrolysis

摘要

1,2-Dichloroethane is manufactured by subjecting a hydrocarbon source to cracking that produces a mixture of products containing ethylene; separating the mixture into at least one fraction containing ethylene and a heavy fraction; conveying the fractions to chlorination and/or oxychlorination reactor; separating 1,2-dichloroethane; and conveying the heavy fraction to cracking or to the oven. Manufacture of 1,2-dichloroethane involves subjecting a hydrocarbon source to cracking that produces a mixture of products (1) containing ethylene and other constituents; separating the mixture of products into at least one fraction containing ethylene and into a heavy fraction (fraction C); conveying the fraction (3, 4, 6, 7) containing ethylene to a chlorination reactor and/or to an oxychlorination reactor, in which reactors most of the ethylene present is converted to 1,2-dichloroethane; separating the 1,2-dichloroethane from the streams of products derived from the chlorination and oxychlorination reactors and it is conveyed to the pyrolysis oven; and conveying the fraction C to cracking or to the oven for pyrolysis of 1,2-dichloroethane as fuel. Independent claims are also included for: (A) a process for the manufacture of vinyl chloride, comprising converting 1,2-dichloroethane obtained by the inventive process to VC in the pyrolysis oven; and (B) a process for the manufacture of polyvinyl chloride by polymerization of the vinyl chloride obtained by the above process.