Process for gas phase polymerization of olefins in a fluidized b

Details Process for gas phase polymerization of olefins in a fluidized b Process for gas phase polymerization of olefins in a fluidized b

1988-07-27

1989-11-21

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526106, 526124, 526901, C08F 234

Patent

active

048824003

ABSTRACT:
Process for gas phase polymerization of olefins using a highly active catalyst in a fluidized bed reactor (1), comprising a recator 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 The gas mixture withdrawn from the disengagement chamber (3) is fed to a dust separator (6) e.g. a clycone, to separate the fine particles entrained by the gas.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 The particles are withdrawn from the dust separator (6) by a mixing device (8) which mixes the particles with a carrier gas.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.

REFERENCES:
patent: 3023203 (1962-02-01), Dye
patent: 4640963 (1987-02-01), Kreider et al.
Translation of French Pat. 2,137,441 to Hartmann et al., published Dec. 29, 1972.
Translation of Japanese Kokai Pub. No. 57-128706 to Kato et al., published Aug. 10, 1982.

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