Treatment of catalyst particles
CA 1288088 C · Owner: Crouzet, Pierre · Inventors: Crouzet, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to processes and apparatus for the elutriation of particles of a Ziegler-Natta type alpha-olefin polymerisation catalyst, based on transition metal compound(s) and preferably also comprising magnesium compounds by means of an, elutriation liquid which is a non-polar liquid for example a, hydrocarbon chemically inert in relation to the catalyst A preferred process comprises the following stages: - preparation of a homogeneous suspension of the catalyst in the elutriation liquid, and, - elutriation of the catalyst by means of the suspension and the elutriation liquid in one or two elutriation columns (F1), (F2), separating the large and fine catalyst particles …
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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 27, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 27, 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.