Transfer of polymer particles between vapor phase...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 2/34 (2006.01) B01J 8/00 (2006.01) B01J 8/26 (2006.01) B01J 8/36 (2006.01) B01J 8/38 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2262735

Method and apparatus are described for continuous vapor phase polymerization of a polymerizable monomer or mixture thereof to produce solid polymer substances in two or more serially disposed vapor phase polymerization reactors, each containing a quench-cooled subfluidized particulate bed of polymerized monomer. More specifically, method and apparatus as described for transfer of polymer particles between high pressure, reactive gas-filled, continuous, vapor-phase polymerization reactors while maintaining each at independently selected operating conditions, wherein the method and apparatus employs two polymer particle transfer chains disposed in parallel between an upstream and a downstream reactor and operated in alternating sequence.

L'invention décrit une méthode et un appareil destinés à la polymérisation continue en phase vapeur d'un monomère polymérisable ou d'un mélange de monomères polymérisables, qui vise à obtenir des substances polymères de solidité normale dans deux ou plusieurs réacteurs de polymérisation en phase vapeur, disposés en série et comprenant chacun un lit particulaire sous-fluidisé de monomère polymérisé, soumis à un refroidissement brusque. L'invention se rapporte notamment à une méthode et à un appareil conçus pour transférer les particules polymères entre plusieurs réacteurs de polymérisation continue en phase vapeur à haute pression, remplis de gaz réactif, tout en maintenant simultanément dans chaque réacteur des conditions de fonctionnement sélectionnées de façon indépendante.

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