Catalyst activation process
First Claim
1. A process for activating a batch of polymerisation catalyst which comprises fluidising the batch of polymerisation catalyst in a fluidisation zone of an activator vessel, where the batch size is such that a settled bed of the catalyst in the activator vessel has a bulk volume of greater than 1.5 m3 and a depth between 1.8 and 3 m.
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Accused Products
Abstract
Catalyst activator, in particular, a catalyst activator for heat conditioning a catalyst. The activator includes a vessel for containing a catalyst charge having an internal diameter of at least 1.2 meters and/or an internal volume of at least 5 m3; a fluidisation grid plate disposed in the vessel, the fluidisation grid plate having an upper major surface and a lower major surface; an array of generally conical depressions in the upper major surface that overlap by less than 17%; and an array of holes perforating the fluidisation grid plate, the holes extending from at least some of the generally conical depressions through the lower surface.
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Citations
22 Claims
- 1. A process for activating a batch of polymerisation catalyst which comprises fluidising the batch of polymerisation catalyst in a fluidisation zone of an activator vessel, where the batch size is such that a settled bed of the catalyst in the activator vessel has a bulk volume of greater than 1.5 m3 and a depth between 1.8 and 3 m.
Specification