Preparation of modified and activated chromocene catalysts for ethylene polymerization
US4101445A · kind A · utility
55Cited by
4References
9Claims
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Key dates
| Filing date | Sep 22, 1976 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Sep 22, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Ethylene polymerization catalysts are prepared by depositing a chromocene compound on a support with a titanium compound and activating the final blend at 300.degree. C. to about 1000.degree. C. A fluoriding agent can be optionally added where a narrower molecular weight distribution of the polyethylene to be obtained is desired. Catalysts with good reproducibility, when prepared by this method, show particular utility in production of polyethylene by a fluid bed process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.