Process for the polymerization of olefines
US6545106B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1997 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Mar 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for the polymerization of olefins, according to which at least one olefin is placed in contact with a catalytic system comprising:a) a solid catalytic complex based on magnesium, transition metal and halogen, the said catalytic complex being prepared by reacting, in a first step, at least one magnesium compound with at least one compound of a transition metal from group IVB or VB of the Periodic Table, until a liquid complex is obtained, and, in a subsequent step, by precipitating the said liquid complex using a halogen-containing organoaluminium compound of general formula AlRnX3-n in which R is a hydrocarbon radical, X is a halogen and n is less than 3, in order to collect a solid catalytic complex, andb) an organometallic compound of a metal from groups IA, IIA, IIB, IIIA and IVA of the Periodic Table,c) at least one electron donor used after the first step in the preparation of the solid catalytic complex leading to the production of a liquid complex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.