Process and device for continuously treating with gases aqueous

Details Process and device for continuously treating with gases aqueous Process and device for continuously treating with gases aqueous

1980-05-19

1981-11-17

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260 296PT, 422225, 528483, 528502, C08F 624, C08F 616

Patent

active

043012752

ABSTRACT:
In aqueous dispersions on the basis of polyvinyl chloride the content of residual monomers is reduced by the countercurrent method by contacting the rapidly moved surface of the dispersion with secluded intensely mixed gas atmospheres in several successive chambers. To carry out the process a device is used which permits to obtain under mild conditions residual monomer contents of 10 ppm and therebelow.

REFERENCES:
patent: 3622553 (1971-11-01), Cines
patent: 3926927 (1975-12-01), Stookey
patent: 3956249 (1976-05-01), Goodman

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