Olefin polymerization catalyst composition
US4548915A · kind A · utility
24Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1984 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Apr 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/903
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A free-flowing, high activity propylene polymer procatalyst component is prepared by the addition of limited amounts of a mineral oil (e.g., 5 to 25 percent) to the recovered MgCl.sub.2 /TiCl.sub.4 /ED procatalyst. The mineral oil becomes absorbed into the catalyst pores resulting in dry, free-flowing powders which retain their original activity for more than two months. This method of catalyst storage and shipping may prove more convenient than the previously used mineral oil slurries. Further, this technique of introducing suitable inert liquids into the catalyst pores results in substantial improvement in catalyst performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.