C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/613
C08F 2/34 (2006.01) B01J 8/00 (2006.01) B01J 8/24 (2006.01) B01J 8/38 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1301406
ABSTRACT OF THE DISCLOSURE Process for gas phase polymerisation of olefins using a highly active catalyst in a fluidized bed reactor (1), comprising a reactor body (2) partially occupied by the fluidized bed and surmounted by a disengagement chamber (3). The gas mixture withdrawn from the disengagement chamber (3) is fed to a dust separator (6) e.g. a cyclone, to separate the fine particles entrained by the gas. The gas is cooled, compressed and recycled to the base of the reactor. The particles are withdrawn from the dust separator (6) by a mixing device (8) which mixes the particles with a carrier gas. The carrier gas and particles are recycled to the reactor where they are introduced into the reactor body (2) through an opening in the side wall thereof at a position above the fluidized bed, but below the disengagement chamber (3). The velocity of the particles introduced into the reactor is insufficient to cause them to be blown directly into the bed.
573437
Dumain Andre
Raufast Charles
Bp Chemicals Limited
Fetherstonhaugh & Co.
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