Process for gas phase polymerisation of olefins in a fluidised bed reactor

Abstract From the Canadian patent

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 The gas mixture withdrawn from the disengagement chamber (3) is fed to a dust separator (6) e.g. a cyclone, to separate the fine particles entrained by the gas.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 The particles are withdrawn from the dust separator (6) by a mixing device (8) which mixes the particles with a carrier gas.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) …