Olefin polymerization catalyst compositions and method of preparation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 30, 2004
Grant Date -
Apr 3, 2003
app pub date -
May 1, 2002
filing date -
May 29, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of making a solid procatalyst composition for use in a Ziegler-Natta olefin polymerization catalyst composition, said method comprising: contacting a solid precursor composition comprising magnesium, titanium, and alkoxide moieties with a titanium halide compound and an internal electron donor in any order, in a suitable reaction medium to prepare a solid procatalyst composition, separating the solid procatalyst from the reaction medium, further exchanging residual alkoxide functionality of the solid procatalyst composition for chloride functionality by contacting the same two or more times with benzoyl chloride halogenating agent under metathesis conditions for a period of time sufficient to prepare a solid procatalyst composition having a decreased alkoxide content compared to the alkoxide content of the solid procatalyst composition before said exchange, and recovering the solid procatalyst composition.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 58 Citation Count
- C08F Class
- 95.20 % this patent is cited more than
- 21 Age
