Ionic liquids for heterogenising metallocene catalysts
US7598200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2005 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/65912
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention discloses a method for preparing an heterogeniseded catalyst component comprising the steps of: a) providing a halogenated precursor component of formula (I) —X—[—CH2]—CH3 b) reacting the halogenated precursor with an ionic liquid precursor in a solvent to prepare an ionic liquid; IL+X− c) optionally, reacting the intermediate IL+X− with a salt C+A−, wherein C+ is a cation that can be selected from K+, Na+, NH4+, and A− is an anion that can be selected from PF6−, SbF6−, BF4−, (CF3—SO2)2N−CIO4—, CF3SO3−, NO3— or CF3CO2−. d) using the ionic liquid prepared in step b) to heterogenise a metallocene component of formula (II) R″(CpRm)(Cp′Rn)MQ2 wherein Cp and C′p are independently selected from substituted or unsubstituted cyclopentadienyl groups M is a metal selected from Group 4 of the Periodic Table, R″ is a structural bridge imparting stereorigidity between Cp and Cp′ and Q is a halogen or an alkyl having from 1 to 12 carbon atoms; e) heterogenising the ionic liquid/metal system by addition of an apolar solvent inducing the precipitation reaction; f) retrieving a metallocene catalyst component heterogenised by an ionic liquid. It also discloses an active catalys…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.