C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
23/376, 402/5.5
C08F 6/24 (2006.01) B01J 3/04 (2006.01) B01J 8/10 (2006.01) C08F 6/00 (2006.01) C08F 14/06 (2006.01)
Patent
CA 1097836
HOE 75/F 902 Process and device for continuously treating with gases aqueous dispersions on the basis of polyvinyl chloride ABSTRACT OF THE DISCLOSURE: 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 there below.
252163
Botsch Franz
Heinze Christoph
Wolff Horst
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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