US 6,982,238 B2
Supported catalyst
Klaus Joachim Jens, Langesund (Norway); Arild Follestad, Stathelle (Norway); Siw Bodil Fredriksen, Skien (Norway); Richard Blom, Oslo (Norway); and Ivar Martin Dahl, Oslo (Norway)
Assigned to Borealis Technology Oy, Porvoo (Finland)
Appl. No. 10/363,061
PCT Filed Aug. 30, 2001, PCT No. PCT/GB01/03877
§ 371(c)(1), (2), (4) Date Apr. 18, 2003,
PCT Pub. No. WO02/18046, PCT Pub. Date Mar. 07, 2002.
Claims priority of application No. 0021301 (EP), filed on Aug. 30, 2000.
Prior Publication US 2003/0166460 A1, Sep. 04, 2003
Int. Cl. B01J 31/00 (2006.01); C08F 4/72 (2006.01); C08F 4/24 (2006.01)
U.S. Cl. 502—155 15 Claims
 
1. 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)
CrAxRy  (I)
wherein each A independently represents an η-ligand; each R 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, provided that if D is oxo then only two oxo groups are present;
or (iii) a compound of formula Cr(η-ligand)2 or CrD(η-ligand) wherein D represents alkyl, siloxy, alkoxy, oxo, halo or aryl.