1,2-DICHLOROETHANE THERMAL CRACKING-MEDIATED PRODUCTION OF VINYL CHLORIDE Russian patent published in 2008 - IPC C07C17/25 C07C21/06 

FIELD: industrial organic synthesis.

SUBSTANCE: 1,2-dichloroethane is introduced at pressure 3.6 MPa into convection zone 3 of cracking furnace 1 wherein it is heated to 230°C and then passed to evaporator 4. Heating of 1,2-dichloroethane in cracking furnace to at least 450°C is effected for 15 to 30 sec. Cracking furnace obtains energy from combustion of heating gas distributed at three tiers in the form of a series of burners wherein each tier may contains one or more burners. The first tier represents a row of burners at 1,2-dichloroethane entry and provides 30 to 70% energy, the second tier represents rows of burner in the middle part and provides 20 to 40% energy, and the third tier represents a row of burners at cracking gas outlet and provides 10 to 20% energy.

EFFECT: increased economical efficiency of vinyl chloride production.

13 cl, 2 dwg, 1 tbl