Kill-gas introduction to a fluidized bed reactor containing chro

Details Kill-gas introduction to a fluidized bed reactor containing chro Kill-gas introduction to a fluidized bed reactor containing chro

1991-08-02

1994-08-09

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 83, 526 84, C08F 242

Patent

active

053367383

ABSTRACT:
The present invention relates to a process for stopping an olefin polymerization which is carried out in a low pressure gas phase reactor, which process comprises introducing an effective quantity of deactivating agent into the reactor, characterized in that the olefin polymerisation is carried out using a chromium oxide catalyst and in that the deactivating agent is selected from oxygen, ammonia, water and carbon monoxide and is introduced over a relatively short period of time. The deactivating agent is preferably introduced into the polymerization reactor in a quantity such that in the reactor the weight ratio of the deactivating agent to the catalyst is at least 0.001.

REFERENCES:
patent: 4306044 (1981-12-01), Charsley
patent: 4326048 (1982-04-01), Stevens et al.
patent: 4547555 (1985-10-01), Cook et al.
patent: 5066736 (1991-11-01), Dumain et al.

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