Catalyst for making polyethylene
US5183792A · kind A · utility
38Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Nov 26, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The instant invention provides an olefin polymerization catalyst comprising chromium and titanium supported on silica. The catalyst is prepared with a low sodium ammonia-stabilized silica sol which has an average silicate particle size of from about 2 to about 6 nm. The catalyst produces polyethylene or a copolymer of ethylene and another olefin selected from the group consisting of the C.sub.3 to C.sub.8 mono 1-olefins, the polymer having a high melt index and a narrow molecular weight distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.