Supported catalyst
AssigneeBorealis Technology Oy
InventorsKlaus Joachim Jens, Arild Follestad, Siw Bodil Fredriksen, Richard Blom, Ivar Martin Dahl
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Abstract
The invention provides a supported chromium catalyst system comprising a chromium catalyst precursor bound via at least one heteroatom to a functionalised support, said heteroatom being connected to said support via an organic group.
Claims17
A supported chromium catalyst-system comprising a chromium catalyst bound via at least one heteroatom to a functionalised support, said heteroatom being connected to said support via an organic group wherein said chromium catalyst is derived from (i) a compound of formula (I)
- CrAxBy (I)
- wherein each A independently represents an η-ligand;
- each B independently represents halogen, alkenyl,
- siloxy, alkyl, alkoxy, amido or cyclopentadienyl;
- x is an integer of 1 or 2;
- and
- y is an integer of 1 to 2 wherein x+y=3;
- (ii) a compound of formula (II)
- CrD4 (II)
- wherein each D independently represents alkyl, siloxy, alkoxy, oxo, halo or aryl;
- or (iii) a compound of formula Cr(η-ligand)2 or CrD(ηn-ligand) wherein D represents alkyl, siloxy, alkoxy, oxo, halo or aryl.
A catalyst system as claimed in claim 8 wherein Xe represents a deprotonated benzyl alcohol or 1,2-dihydroxyethyl phenyl.
A catalyst system as claimed in claim 10 wherein the benzyl alcohol or 1,2-dihydroxyethyl phenyl group is bound. to the support via the 4-position on the phenyl ring.
A particulate organic polymer support having a pKa of less than 20, metallated with a catalytically effective amount of chromium.
Dependencies are inferred from the claim text.