Method and apparatus for discharging polymerization reactors

Details Method and apparatus for discharging polymerization reactors Method and apparatus for discharging polymerization reactors

2005-03-10

2010-02-02

Cheung, William K (Department: 1796)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

C526S069000, C526S070000, C526S074000

Reexamination Certificate

active

07655192

ABSTRACT:
A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention includes continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

REFERENCES:
patent: 4495337 (1985-01-01), Raufast
patent: 4535134 (1985-08-01), de Lorenzo et al.
patent: 4543399 (1985-09-01), Jenkins, III et al.
patent: 4803251 (1989-02-01), Goode et al.
patent: 4973459 (1990-11-01), Lippert et al.
patent: 5326835 (1994-07-01), Ahvenainen et al.
patent: 5834571 (1998-11-01), Bernier et al.
patent: 5939027 (1999-08-01), Ruelle
patent: 0 006 288 (1980-01-01), None
patent: 0 024 933 (1981-03-01), None
patent: 0 245 043 (1987-11-01), None
patent: 0 381 364 (1990-08-01), None
patent: 0 381 364 (1990-08-01), None
patent: 0 517 868 (1992-12-01), None
patent: 0 830 892 (1998-03-01), None
patent: 0 870 539 (1998-10-01), None
patent: 0 870 539 (1998-10-01), None
patent: 58/113208 (1983-07-01), None
patent: 3-229633 (1991-10-01), None
patent: WO-97/04015 (1997-02-01), None
H. Feldman,Powder and Bulk Engineering, “Selecting a lump breaker for gross size reduction,” Jun. 1987, pp. 26-29.
G. Stolhandske,Powder and Bulk Engineering, “Breaking your lumps: Crushers and how to select one,” Jun. 1997, pp. 49-57.
Notice of Opposition, European Patent No. 1159305 B1 (99972228.3).

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