High efficiency catalysts for olefin polymerization
US4136058A · kind A · utility
19Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1977 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Feb 28, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/903
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Olefin polymerization catalysts prepared by reducing transition metal compounds with an organometallic compound are rendered highly efficient by reacting excess organometallic compound with a deactivation agent, such as hydrogen chloride, prior to activation of the catalyst with organoaluminum compounds. Catalyst efficiencies of as high as 700,000 grams of polyethylene per gram of transition metal in the catalyst have been attained at reactor pressures of only 50 psig.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.