A method for the preparation of emulsion poly vinyl chloride under avoidance of vinyl chloride - emissions

摘要

Vinyl chloride emissions from the gaseous phase of large scale vinyl chloride batch emulsion polymerizations are reduced by discharging the liquid phase only of the polymerizate to a discharge zone at a pressure differential of 0.1-2.5 atmospheres lower than the reactor provided by residual vinyl chloride in the reactor, maintaining the reactor unopened; and then conducting another vinyl chloride polymerization in the reactor in the presence of the residual vinyl chloride from the prior polymerization.