Research for PVC manufacturing technology -reduction of monomer emission technology for environmental needs

Abstract

A stripping column for residual vinyl chloride monomer (VCM) in poly (vinyl chloride) (PVC) slurry was developed in order to meet the most important environmental needs in PVC manufacturing. A stripping column consisting of a steam/PVC slurry counterflow system with sieve trays was chosen to achieve VCM environmental regulation, higher PVC productivity, and preservation of PVC quality (especially initial color of PVC) after VCM stripping. The stable running conditions and VCM stripping ability were evaluated for this column. Based on these results, the VCM stripping column was scaled up, and a high efficiency VCM stripping system with a stripping capacity of 35 t/h (as PVC) was designed. Copyright © 2010 The Society of Chemical Engineers, Japan.