Catalyst efficiency for supported metallocene catalyst
US6225251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | May 4, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a polymerization process with improved catalyst activity of a metallocene catalyst supported on silica treated with MAO, a process for supporting a metallocene compound on silica treated with MAO, a metallocene catalyst supported on silica treated with MAO within a certain temperature range and a process for making a metallocene catalyst supported on silica treated with MAO. The invention includes supporting the metallocene compound on a MAO-treated silica at a temperature of below 0.degree. C. The supported catalyst is activated with an aluminum alkyl. The catalyst may be prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.