The CRACKING product consisting of EDC, VCM and HCl is separated in the VCM DISTILLATION unit.

Hydrogen chloride is recovered in the HCl column and fed to the OXYCHLORINATION unit.
Vinyl chloride is obtained at the top of the VCM column and traces of HCl are removed in the HCI stripper.

The bottom product of the VCM column, mainly unconverted EDC, is returned to the EDC DISTILLATION process after the low-boiling components have been converted to high-boiling components by chlorination.

Advantages of the VCM distillation:
Advantages of the recycle EDC chlorination: