Production of polyolefins in high condensation mode in turbulent conditions in a fluidized bed.

摘要

A process for alpha-olefin polymerization in gas phase reactor having a fluidized bed and a fluidizing medium wherein the gas phase reactor is operated stably in a mode turbulent operating and wherein the fluidizing medium serves to controlling the cooling capacity of said reactor, the process comprising employing in the fluidizing medium a level of liquid entering the reactor which is at least 17.5 weight percent based on the total weight of the fluidizing medium and wherein the superficial gas velocity is greater than the transition speed bubbling regime to turbulent fluidization U c, and is below the transport velocity Uk, and the ratio of fluidized bulk density to settled bulk density of the resin varies from 0, 4 to 0.55.