Method for stripping unreacted mono-olefinic monomers

Details Method for stripping unreacted mono-olefinic monomers Method for stripping unreacted mono-olefinic monomers

C - Chemistry, Metallurgy

08

F

402/483, 202/91

C08F 6/04 (2006.01) C08F 6/00 (2006.01) C08F 220/44 (2006.01)

Patent

CA 1047699

ABSTRACT OF THE DISCLOSURE The method of stripping unreacted monomers from slurries produced by polymerization of acrylonitrile with other mono- olefinic monomers wherein the slurry is fed downward through a devolatilization zone having a sequence of surfaces each having therein perforations through which the slurry can flow downward onto the next surface in the sequence. Inert gas is fed upward through the perforations and the slurry on the surfaces to strip unreacted monomers from the slurry and to agitate the slurry to prevent settling of polymer solids. The inert gas feed is reduced or stopped intermittently to allow the slurry to flow through the perforations under the influence of gravity. -1-

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