Apparatus and process for polymerising olefin in gas phase

Details Apparatus and process for polymerising olefin in gas phase Apparatus and process for polymerising olefin in gas phase

1996-02-12

1999-07-27

Wu, David W.

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

Synthetic resins

Removing and recycling removed material from an ongoing...

526 69, 526 70, 526 88, 526901, 5263486, 422145, 422233, C08F 234

Patent

active

059291800

ABSTRACT:
The present invention relates to a process for continuous gas-phase polymerisation of olefin(s) in a fluidized-bed reactor, comprising drawing off the polymer from the vertical side wall of the reactor into a lock hopper via a draw-off conduit so that all flow of the polymer in the draw-off conduit is produced according to a downward direction forming with a horizontal plane an inclination with an angle A at least equal to the angle of repose .beta. of the polymer and not exceeding 90.degree.. The present invention improves the degree of filling of the lock hopper and reduces the amount of gas drawn off with the polymer.

REFERENCES:
patent: 4039507 (1977-08-01), Paige et al.
patent: 4399055 (1983-08-01), Matsuura et al.
patent: 4425206 (1984-01-01), Hutchinson
patent: 5633333 (1997-05-01), Chinh
Robert H. Perry et al. "Chemical Engineers' Handbook" 5th Edition, pp. 20.71.about.20.72, 1973.

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