VCM DISTILLATION

Hydrogen chloride is recovered in the HCl column and fed to the OXYCHLORINATION unit. Vinyl chloride is recovered 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

. The advantages of the Vinnolit process can be summarized as follows:

· reliable equipment
· proven materials
· direct vapor feed from HCl stripper overhead to the HCl column without condensation
· H2O adsorption at top of HCl stripper – no corrosion in HCl column
· single reboiler with long operation times due to hot-quench technology
· replacement of low boils distillation column for recycled EDC by cheaper RECYCLE EDC CHLORINATION process.