Patent ID: 9556291
Date: 2017-01-31
CPC Classifications: C08F

Claim:
1. A process for producing olefin-based polymer comprising: providing a gas phase polymerization reactor comprising a distributor plate and a fluidizing medium having a dew point temperature (DPT), the fluidizing medium comprising one or more olefin monomers and from 5 wt % to 25 wt % of a condensed liquid; forming, in the reactor, a wet zone by maintaining a temperature less than or equal to the DPT+2° C. in a region in the reactor defined as extending from the distributor plate to 2.5 meters above the distributor plate; injecting a catalyst composition into the wet zone, the catalyst composition having a catalyst activity greater than 50 ton/kg; contacting, in the wet zone under gas phase polymerization conditions, the catalyst composition with the one more monomers of the fluidizing medium; and forming particles of olefin-based polymer having a settled bulk density greater than 23.5 lb/ft