| 摘要 |
Process for the manufacture of DCE starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to a first cracking step, namely a pyrolysis step carried out in at least one cracking furnace, thus producing a mixture of cracking products; b) said mixture of cracking products is subjected to a series of treatment steps making it possible to obtain a mixture of products containing ethylene and other constituents; c) said mixture of products containing ethylene is subjected to a first separation step S1 which consists of separating said mixture of products inside a column C1, into a fraction enriched with the compounds that are lighter than ethylene containing some of the ethylene (fraction A) and into a fraction F1; d) fraction F1 is subjected to a second separation step S2 which consists of separating fraction F1 inside a column C2 into a fraction F2 and into a heavy fraction (fraction C); e) fraction F2 is subjected to a third separation step S3 which consists of separating fraction F2 inside a column C3 into a fraction enriched with ethylene (fraction B) and into a fraction F3 mainly composed of ethane; f) fraction A is conveyed to a chlorination reactor and fraction B is conveyed to an oxychlorination reactor, reactors in which most of the ethylene present in fractions A and B is converted tol,2-dichloroethane; and g) the 1,2-dichloroethane obtained is separated from the streams of products derived from the chlorination and oxychlorination reactors. |
