Continuous gas-phase polymerization process

Details Continuous gas-phase polymerization process Continuous gas-phase polymerization process

2005-08-30

2005-08-30

Cheung, William K. (Department: 1713)

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

Synthetic resins

Removing and recycling removed material from an ongoing...

C526S070000, C526S083000, C526S084000, C526S085000, C526S082000, C526S901000, C526S348000, C526S351000, C526S352000

Reexamination Certificate

active

06936666

ABSTRACT:
Continuous gas-phase polymerization process for preparing ethylene and propene homopolymers and copolymers, in which ethylene, propene or mixtures comprising ethylene or propene and C3-C8-α-monoolefins are polymerized in the polymerization zone of a gas-phase polymerization reactor at from 30 to 125° C. and pressures of from 1 to 100 bar in the gas phase in a bed comprising finely divided polymer in the presence of a catalyst. To remove the heat of polymerization, the reactor gas is circulated and firstly passes through a cyclone after leaving the reactor. To prevent polymer deposits in the circulating gas system, a catalyst poison having a boiling point above the maximum temperature within the circulating gas system is fed into this circulating gas system at a position between the reactor and the cyclone.

REFERENCES:
patent: 5625012 (1997-04-01), Hussein et al.
patent: 6180729 (2001-01-01), Lange et al.
patent: 089 691 (1983-09-01), None
patent: 301 872 (1989-02-01), None
patent: 359 444 (1990-03-01), None
patent: 376 559 (1990-07-01), None
patent: 471 497 (1992-02-01), None
patent: 475 603 (1992-03-01), None
patent: 571 826 (1993-12-01), None
patent: 927 724 (1999-07-01), None
patent: 98/20045 (1998-05-01), None
XP-002233606,Reaction Kills SystemsAug. 2000.

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