Process for producing polyolefin

Details Process for producing polyolefin Process for producing polyolefin

2005-05-10

2005-05-10

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...

C526S089000, C526S901000, C526S217000, C526S236000, C526S348200, C526S348300, C526S348400, C526S348500, C526S348600, C526S211000, C526S209000

Reexamination Certificate

active

06891002

ABSTRACT:
A process for producing a polyolefin according to the present invention comprises (co) polymerizing one or two or more α-olefins in a vapor phase in a fluidized-bed reactor, wherein the concentration of (A) a saturated aliphatic hydrocarbon in the fluidized bed reactor is 1 mol % or more and at least one compound selected from (B) an aliphatic amide and (C) a nonionic surfactant constituted only of carbon, oxygen and hydrogen atoms is made to exist in the reactor. The present invention can provide a process for producing a polyolefin, the process ensuring that the prevention of clogging caused by the generation of sheet or block polymers and a high efficiency of the production of a polyolefin due to good catalytic activity can be accomplished at the same time and also having superb continuous productivity.

REFERENCES:
patent: 6180729 (2001-01-01), Lange et al.
patent: 6369174 (2002-04-01), Wenzel et al.
patent: 0 107 127 (1984-05-01), None
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patent: 2000-313716 (2000-11-01), None
patent: 2000-313717 (2000-11-01), None
patent: 2000-327707 (2000-11-01), None

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