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Continuous catalyst activator

  • US 8,114,353 B2
  • Filed: 12/20/2007
  • Issued: 02/14/2012
  • Est. Priority Date: 12/20/2007
  • Status: Active Grant
First Claim
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1. A polymerization system comprising:

  • (a) a polymerization reactor;

    (b) continuous catalyst activator comprising a substantially horizontal fluidized bed vessel, and wherein the continuous catalyst activator further comprises;

    (i) a gas distributor plate extending substantially horizontal within the fluidized bed vessel being arranged to allow passage of a fluidizing gas throughout the fluidized bed vessel;

    (ii) an inlet for introducing a catalyst into the fluidized bed vessel;

    (iii) at least one zone dividing wall for dividing the fluidized bed vessel into a plurality of zones, at least one of the zone dividing walls comprising a zone opening that allows the catalyst to be introduced into a next downstream zone, the plurality of zones being located substantially horizontal in relation to one another; and

    (iv) each zone comprising at least one baffle, each baffle defining a stage, each zone comprising a lower boundary that comprises at least a portion of the gas distributor plate;

    (c) a controller programmed with an algorithm to control a polymerization reactor process variable by adjusting a continuous catalyst activator process variable; and

    further comprising at least one of;

    (d1) a filter apparatus adapted to remove catalyst particles entrained in the fluidizing gas;

    or(d2) a cooling system wherein an oxidizing stage cools the catalyst with a first oxidizing ambient compound and a purge stage purges the catalyst with a first inert agent.

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