Patent ID: 7482411
Filing Date: 2009-01-27
Classification: B01J,C08F,Y10S

Abstract:
1. A continuous process for polymerizing olefins in a fluidized bed reactor, said process comprising: continuously passing a gaseous stream comprising one or more α-olefin monomers through a fluidized bed with a polymerization catalyst under reactive conditions; withdrawing a polymeric product and unreacted fluids from said fluidized bed reactor; cooling part of said unreacted fluids below at least one dew point of said unreacted fluids to form a two-phase mixture comprising a gas and a condensed liquid; and reintroducing said two-phase mixture into said fluidized bed reactor, wherein said two-phase mixture is reintroduced under a distribution plate of said fluidized bed reactor in a direction which is tangential to at least one reactor wall, such that at least one part of said condensed liquid is separated from said gas, and said condensed liquid is fed above said fluidized bed through an external pipe connecting a bottom of said fluidized bed reactor to a position above an upper limit of said fluidized bed, the external pipe comprising an inlet below the distribution plate.