Columns vinyl chloride monomer process

Application Adding a stripping column to existing polyvinyl chloride (PVC) plants to remove vinyl chloride monomer (VCM) from PVC slurry. The recovered VCM can be reused in the PVC process, without any deterioration of PVC polymer quality. 

Figure 22.8 Sorption-reaction (SR) process for removal of trace organic contaminants (a) schematic drawing of a two column SR process, (b) shell and tube reactor configuration for the process, (c) isotherms for adsorption of trace vinyl chloride monomer (VCM) on an activated carbon.

Selection of pertinent process units A process unit is defined as any major item of process equipment. The following units could be identified, for example, in a fumace/quench section in a vinyl chloride monomer/ethylene dichloride plant ethylene dichloride pre-heater, ethylene dichloride evaporator, furnace, quench column, ethylene dichloride absorber and tar pot. Important factors for selecting pertinent process units include ... 

Figure 12-4. The European Vinyls Corp. process for producing polyvinyl chloride using suspension polymerization (1) reactor, (2) blow-down vessels (to separate unreacted monomer), (3) stripping column, (4) reacted monomer recovery, (5) slurry centrifuge, (6) slurry drier.

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