Process for continuously removing monomers from an aqueous dispe

Details Process for continuously removing monomers from an aqueous dispe Process for continuously removing monomers from an aqueous dispe

1977-10-06

1979-10-16

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

422138, 5263443, C08F 616, C08F 624

Patent

active

041714270

ABSTRACT:
Monomeric matter is removed from an aqueous dispersion of a polymer containing at least 50 weight % of polymerized vinyl chloride. To this end, the dispersion is introduced into the upper portion of a column provided with sieve plates and contacted therein for 10 seconds up to 20 minutes, under 600 up to 1200 mm Hg, with hot steam at 100.degree. up to 150.degree. C. flowing countercurrently with respect to the dispersion. The polymer dispersion so treated is removed from the column base portion; and a vaporous matter mixture issuing at the head of the column is condensed stagewise so as to recover an aqueous phase and the monomeric matter.

REFERENCES:
patent: 3622553 (1971-11-01), Cines
patent: 3772262 (1973-11-01), Clementi
patent: 3793259 (1974-02-01), Brinkman
patent: 3926927 (1975-12-01), Stookey
patent: 3954910 (1976-05-01), Kropp
patent: 3956249 (1976-05-01), Goodman

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