Process for continuously removing monomers from an aqueous...

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

C - Chemistry, Metallurgy

08

F

402/5.5

C08F 6/24 (2006.01) B01D 3/38 (2006.01) C08F 6/00 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1278638

PROCESS FOR CONTINUOUSLY REMOVING MONOMERS FROM AN AQUEOUS DISPERSION OF A POLYMER ABSTRACT OF THE DISCLOSURE: Monomeric matter is removed from an aqueous disper- sion of a polymer containing at least 50 weight % of po- lymerized 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 up to 150°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 con- densed stagewise so as to recover an aqueous phase and the monomeric matter.

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