Process for the production of emulsion polyvinyl chloride under

Details Process for the production of emulsion polyvinyl chloride under Process for the production of emulsion polyvinyl chloride under

1975-09-03

1977-04-26

Henderson, Jr., Christopher A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526344, C08F 330, C08F 198, C08F 113

Patent

active

040202631

ABSTRACT:
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.

REFERENCES:
patent: 2979492 (1961-04-01), Governale
patent: 3317449 (1967-05-01), Isaacs
patent: 3669946 (1972-06-01), Koyanagi
patent: 3793259 (1974-02-01), Brinkmann
patent: 3842055 (1974-10-01), Gabriel
patent: 3926931 (1975-12-01), Koyanagi

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