Process and apparatus for the gas-phase polymerization of olefin

Details Process and apparatus for the gas-phase polymerization of olefin Process and apparatus for the gas-phase polymerization of olefin

1996-09-09

1998-03-17

Kim, Christopher

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422131, 422140, 422189, 422234, 422235, 525 53, 526 65, 526904, F27B 1508

Patent

active

057283532

ABSTRACT:
Gas-phase process for the preparation of polymers and copolymers of olefins CH.sub.2 .dbd.CHR, carried out in at least 2 fluidized or mechanically agitated bed gas-phase reactors operating under different reaction conditions so as to obtain different polymers in the different reactors; the process is characterized in that the polymer is at least partially recycled among the different reactors by using ratios of the flow rate of circulation among the different reactors to the discharge flow rate comprised between 2 and 6.

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patent: 4472520 (1984-09-01), Zucchini et al.
patent: 4703094 (1987-10-01), Raufast
patent: 4748221 (1988-05-01), Collomb et al.
patent: 5087522 (1992-02-01), Bailly et al.
patent: 5139985 (1992-08-01), Barbe' et al.

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