Deactivation of catalysts of the Ziegler type used for the preparation of polyethylene in high pressure, high temperature processes
US4105609A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Feb 25, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the continuous polymerisation and copolymerisation of ethylene under a pressure higher than 500 bars and at temperatures higher than about 160.degree. C in the presence of a catalyst containing a derivative of a transition metal and an organic derivative of aluminium, wherein there is injected into the reaction mixture at the end of reaction at least one alkali metal salt or alkaline earth metal salt of a carboxylic acid, in an amount sufficient to bring about the deactivation of the catalyst, said salt being so chosen that its reaction products with the constituents of the catalyst remain in the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.