Apparatus for degassing and pelleting polyolefins
CA 1287463 C · Owner: Raufast, Charles · Inventors: Raufast, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process and a device for degassing and converting into pellets polyolefins from a gas-phase reactor. A device according to the invention comprises in combination, (fig 1):, - a reactor (1) for the catalytic polymerisation in the gas phase of alpha-olefins, equipped with a polyolefin outlet (9); - A device (12) for primary degassing by separation of the solid and gas phases, connected to the said outlet; - A device for secondary degassing (14) to substantially free the particles of the gases accompanying them and which is connected to the outlet of the primary degassing (12) and which comprises a mechanical stirrer (14a) making it possible to raise the temperature …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.