| PATENT CLAIMS |
Process for continuous gas-phase polymn of olefins in a reactor with a fluidized bed & a vertical side wall at an absolute pressure P1 > than atm. pressure, by continuous introduction of a catalyst into the reactor, continuous introduction of olefin into a reaction gas mixt. passing continuously through the reactor according to an upward stream & being recycled to the base of the reactor, removal of the heat of polymn by cooling the recycled reaction gas mixt. & drawing off the polymer manufactured into a lock hopper provided with a discharge valve & connected to the vertical side wall of the reactor by a draw-off conduit equipped with an isolation valve, process characterized in that all flow of the polymer drawn off by the said conduit from vertical side wall of reactor into the lock hopper is produced according to a direction pointing downwards forming with a horizontal plane an inclination with an angle A > 35 degrees & > equal to the angle of repose b of the polymer & < 90 degrees
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