After the cracking (pyrolysis), HCl and unconverted EDC are separated from VC by two steps of distillation and recycled. The VC is stored either under pressure at ambient temperature or refrigerated at approximately atmospheric pressure (European Council of Vinyl Manufacturers, 1994). More than 90% of the VC produced today is based on this route (Rossberg et al., 1986; Allsopp & Vianello, 1992).