Patent ID: 7482410

Claim:
A process for reducing ultra high molecular weight polymeric material in a polyethylene resin comprising: (i) contacting a mixture comprising ethylene with a catalyst system comprising the supported reaction product of at least one bis-hydrocarbylsilyl chromate and at least one compound selected from the group consisting of hydrocarbylaluminum compounds and hydrocarbylboron compound in a fluidized bed reactor to provide a polyethylene resin having a density of about 0.94 g/cm 3 to about 0.965 g/cm 3 ; (ii) providing a recycle gas stream to the fluidized bed reactor through a recycle gas line having a recycle gas cooler in fluid communication therewith; and (iii) providing a stream comprising make-up ethylene to the fluidized bed reactor, wherein at least one catalyst deactivator having a boiling point, as determined at 101.3 kPag, lower than the maximum temperature within the recycle gas line is provided to the recycle gas line not more than 2 meters from the recycle gas cooler outlet or upstream thereof to reduce the concentration of ultra high molecular weight polymeric material in the polyethylene resin.