System and process for production of polyvinyl chloride

Details System and process for production of polyvinyl chloride System and process for production of polyvinyl chloride

C - Chemistry, Metallurgy

08

F

C08F 14/06 (2006.01) B01F 7/26 (2006.01) C08F 2/01 (2006.01)

Patent

CA 2693422

A method is disclosed for producing polyvinyl chloride which includes mixing a vinyl chloride solution with an initiator solution in at least one high shear mixing device comprising at least one rotor/stator set producing a rotor tip speed of at least 5.1 m/sec (1000 ft/min), to form a polymerization mixture; and allowing the mixture to polymerize by free radical polymerization to form polyvinyl chloride. The polymerization mixture may be subjected to free radical polymerization conditions comprising a temperature in the range of about 20°C to about 230°C. In some embodiments, the high shear mixing device produces a shear rate of at least 20,000 s-1. A system for carrying out the method is also disclosed.

L'invention concerne un procédé de production de polychlorure de vinyle qui contient un mélange d'une solution de polychlorure de vinyle avec une solution d'initiateur dans au moins un mélangeur à cisaillement élevé comprenant au moins un ensemble rotor/stator qui produit une vitesse périphérique de rotor d'au moins 5,1 m/sec (1000 ft/min), pour former un mélange de polymérisation; et qui permet de polymériser le mélange par polymérisation de radicaux libres pour produire du polychlorure de vinyle. Le mélange de polymérisation peut être soumis à des conditions de polymérisation de radicaux libres notamment à une température comprise entre environ 20°C et environ 230°C. Dans certains modes de réalisation de cette invention, le mélangeur à cisaillement élevé produit un taux de cisaillement d'au moins 20,000 s-1. L'invention concerne également un système destiné à mettre en oeuvre ce procédé.

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