Almost all Vinyl Chloride Monomer (VCM) produced is used in
manufacturing of Polyvinyl Chloride (PVC) resins. PVC is used
in the building and construction industry, consumer goods and
packaging. Filtration plays an important part in the VCM/PVC
process as it has a direct affect upon process yield, process
efficiency and product quality, and also helps minimize operator
exposure to hazardous VCM.
Typically, vaporized ethylene dichloride is dried and passed
over a catalyst (e.g. pumice or charcoal) packed in stainless
steel tubes that are directly heated in a cracking furnace. The
hot effluent gases are quenched and the condensed gases fed
into a fractionating tower operating under pressure. The prod-
uct VCM is formed by condensing the overhead vapors in a
water condenser. The VCM is then filtered and sent to either a
storage tank for further processing to produce PVC or sold to
other manufacturers that make PVC.
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