Recycle of water from polyvinyl chloride polymerization by...

C - Chemistry – Metallurgy – 02 – F

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C02F 1/42 (2006.01) B01J 39/04 (2006.01) B01J 41/04 (2006.01) C08F 2/16 (2006.01)

Patent

CA 2269331

Water recovered from the polymerization of vinyl monomers can be treated to remove or deactivate chain transfer agents present in the water allowing reuse in polymerization processes. The water recovered from a vinyl polymerization reaction is contacted with a cation exchange resin in the hydrogen form prior to recycle, or may be acidified and then contacted with an anion exchange resin in the hydroxide form.

L'invention décrite permet de traiter l'eau récupérée de la polymérisation de monomères vinyliques, en vue de supprimer ou de désactiver des agents de migration de chaîne présents dans l'eau, et de permettre la réutilisation de cette eau dans des processus de polymérisation. Avant le recyclage, on met en contact l'eau récupérée d'une réaction de polymérisation vinylique avec une résine échangeuse de cations sous la forme d'hydrogène. On peut également l'acidifier, puis la mettre en contact avec une résine échangeuse d'anions sous la forme d'un hydroxyde.

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