Olefin polymerization catalyst of chromium and process of preparing it
US4218345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1979 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Jan 15, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst, a process of preparing the catalyst and a method of making polymers and copolymers of 1-olefins with the catalyst in which the catalyst is prepared by producing finely divided particles of chromium metal by a sublimation process and dispersing the sublimate of chromium particles with an organic liquid and providing a mixture comprising the chromium sublimate particles and a support such as silica. The mixture is then heat activated in an oxidizing atmosphere. In another aspect of the invention the chromium sublimate particles and support particles are further modified by having a titanium compound as a part of the mixture of chromium sublimate particles and support particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.