Patent ID: 7232551
Filing Date: 2007-06-19
Classification: B01J,Y10S

Abstract:
1. A method for activating and/or calcining olefin polymerization catalysts which contain transition materials as an active component or catalyst supports which contain oxidic compounds as a support material, said method comprising the steps of (a) introducing and distributing gas in the lower section of a reactor containing a layer of catalyst or catalyst support, (b) forming a fluidized bed in the reactor, (c) treating the catalyst or catalyst carrier particles in the fluidized bed wherein the treatment of the catalyst or catalyst support is selected from the group consisting of an activation treatment, a calcination treatment and both an activation treatment and a calcination treatment, and (d) discharging the reactor such that said reactor is substantially residue-free, wherein said reactor has a bottom which tapers downwards, and wherein said reactor has no gas distribution plate.