Closed loop continuous polymerisation reactor and...

B - Operations – Transporting – 01 – J

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B01J 19/18 (2006.01) B01J 19/24 (2006.01) C08F 2/00 (2006.01) C08F 2/01 (2006.01)

Patent

CA 2339771

The invention pertains to a closed loop continuous emulsion polymerisation apparatus at least comprising a circulation pump, a reactor tube (16, 27) which connects the outlet of the circulation pump to its inlet, at least one feed for supplying raw materials, an outlet, and means for cooling the tube, characterised in that the reactor further comprises an additional tube for bypassing a pig around the circulation pump, a pig receiving station which is in parallel connection with the circulation pump or the reactor tube (16, 27), and optionally means for directing a pig into the pig receiving station. The invention allows simple removal of the pig from the reactor, affords great freedom in selecting the type of circulation pump and material and shape of the pig, and enables total control over the launching of the pig substantially independent of the reaction medium flow.

Cette invention se rapporte à un appareil de polymérisation d'émulsion continue en boucle fermée, comprenant au moins une pompe de circulation, un tube réacteur (16, 27) qui raccorde la sortie de la pompe de circulation à son admission, au moins une source de matériaux bruts, une sortie, et un moyen de refroidissement du tube. Cet appareil se caractérise en ce que le réacteur comporte en outre un tube supplémentaire permettant à un racleur de contourner la pompe de circulation, une station de réception du racleur qui est raccordée en parallèle à la pompe de circulation ou au tube réacteur (16, 27), et éventuellement un moyen destiné à diriger le racleur dans la station de réception du racleur. Cette invention permet le retrait simple du racleur du réacteur, confère à l'opérateur une grande liberté de sélection du type de pompe de circulation et du matériau et de la forme du racleur, et permet un contrôle complet sur le lancement du racleur de façon sensiblement indépendante de l'écoulement du milieu de réaction.

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