Method for continuously producing halogenated elastomers and...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/20 (2006.01) B01J 19/24 (2006.01) C08C 19/12 (2006.01)

Patent

CA 2443101

The inventive method for continuously producing a halogenated elastomer consists in conveying a halogenating agent to a continiuous stream of elastomer solution. Said halogenating agent and elastomer solution are mixed in such a way that the halogenated elastomer is produced. The inventive method also consists in neutralising the halogenated elastomer with a neutralising medium and washing it at least once with a washing medium. The halogenation, washing and neutralisation are performed under turbulent conditions and inversion phenomena and are followed by successive removal of the exceeding halogenating agent and decantation of washing and neutralising mediums from the halogenated elastomer. The inventive device for continuously producing the halogenated elastomer comprises reactors for halogenating, washing and neutralising mediums. Each reactor is provided with static and dynamic means for producing the turbulence and the inversion phenomena. A reservoir for removing the exceeding halogenating agent and decanting the washing and neutralising mediums from the halogenated elastomer is arranged after each reactor.

Le procédé de production en continu d'élastomère halogéné consiste à amener un agent halogénant dans un courant continu d'une solution d'élastomère, ledit agent se mélangeant et interagissant avec cette dernière de façon à produire l'élastomère halogéné, à neutraliser l'élastomère halogéné à l'aide d'un milieu neutralisant et à le laver au moins une fois au moyen d un milieu de lavage. On effectue l'halogénation, le lavage et la neutralisation dans des conditions turbulentes, sous l'effet d'inversion, qui sont suivies par l'évacuation successive de l'excédent d'agent halogénant et par la décantation des milieux de neutralisation et de lavage de l'élastomère halogéné. Ce procédé est mis en oeuvre par le dispositif de production en continu d'élastomère halogéné qui comprend des réacteurs d'halogénation, de lavage et de neutralisation. Chaque réacteur est muni de moyens statiques et dynamiques servant à assurer la turbulence sous l'effet d'inversion. En amont de chaque réacteur on monte un réservoir qui sert à évacuer l'excédent d'agent halogénant et à décanter les milieux de neutralisation et de lavage de l'élastomère halogéné.

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