Patent ID: 8067509
Filing Date: 2011-11-29
Classification: B01J,C08F,Y10S

Abstract:
1. A process for the polymerization of olefins, comprising: introducing at least one olefin and at least one catalyst into a reactor to form a polyolefin, the reactor comprising: wherein a first end of the motive bed region is fluidly connected to the top of the fluidized bed region; and wherein a second end of the motive bed region is fluidly connected to the bottom of the fluidized bed region; and wherein a diameter of the fluidized bed region is greater than a diameter of the motive bed region; circulating at least a portion of the olefin, the catalyst, and the polyolefin through the fluidized bed region and the motive bed region, wherein the superficial gas velocity of the motive bed region is greater than the superficial gas velocity of the fluidized bed region and wherein the superficial gas velocity of the motive bed region is greater than the transport velocity of the particles carried from the fluidized bed region; maintaining a dense-phase fluidized bed within the fluidized bed region; recovering polyolefin from the fluidized bed region; and recovering heat from the circulating olefin in at least one of the fluidized bed region and the motive bed region.