Direct conversion of a polymerization reaction catalyzed by a Ziegler-type catalyst into one catalyzed by a chromium-based catalyst
US4460755A · kind A · utility
22Cited by
7References
17Claims
0Family size
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Key dates
| Filing date | Oct 28, 1982 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Oct 28, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of converting a continuous olefin polymerization reaction catalyzed by a Ziegler-type catalyst into one catalyzed by a chromium-based catalyst, without the need of emptying and recharging the polymerization reactor, by adding a hydroxyl-containing compound to the reactor containing the Ziegler-type catalyst to interact with such catalyst before the chromium-based catalyst is introduced into the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.