Solid catalyst for the (co)polymerisation of α-olefins and process for the preparation thereof
US10486144B2 · kind B2 · utility
1Cited by
6References
10Claims
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Key dates
| Filing date | Jul 30, 2015 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved solid Ziegler-Natta type catalyst for the (co)polymerisation of ethylene and α-olefins, particularly in high-temperature processes, such as for example adiabatic solution processes and high-pressure adiabatic processes with elevated productivity, is provided. Said catalyst is obtained by means of an original process comprising dissolving in hydrocarbons, compounds of titanium, magnesium and optionally a metal selected from hafnium and zirconium, and reprecipitating them in two steps in succession, the first of which is chlorination and the second reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.