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AssigneeBP Chemicals Limited
InventorsGeorge Johan Peter Britovsek, Birgit Angelika Dorer, Vernon Charles Gibson, Brian Stephen Kimberley, Gregory Adam Solan
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Catalyst systems useful for the polymerization of 1-olefins are disclosed, which contain nitrogen-containing transition metal compounds comprising the skeletal unit depicted in Formula (B), wherein M is Fe[II], Fe[III], Ru[II], Ru[III] or Ru[IV]; X represents an atom or group covalently or ionically bonded to the transition metal M; T is the oxidation state of the transition metal M and b is the valency of the atom or group X; R1, R2, R3, R4 and R6 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; R5 and R7 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl.
A polymerisation catalyst comprising
A catalyst as claimed in any one of the preceding claims wherein X is selected from halide, sulphate, nitrate, thiolate, thiocarboxylate, BF4−, PF6−, hydride, hydrocarbyloxide, carboxylate, hydrocarbyl, substituted hydrocarbyl and heterohydrocarbyl.
A catalyst as claimed in any one of the preceding claims wherein the organoaluminium compound is a trialkylaluminium compound.
A catalyst as claimed in any one of the preceding claims wherein the organoaluminium compound is an alumoxane.
A catalyst as claimed in any one of the preceding claims characterised in that the catalyst is supported on a support material.
A catalyst system comprising the catalyst claimed in any one of the preceding claims and further comprising (3) a neutral Lewis base.
A process for the polymerisation or copolymerisation of 1-olefins comprising contacting the monomeric olefin under polymerisation conditions with the polymerisation catalyst claimed in any one of the preceding claims.
20 A process a claimed in claim 19 wherein the monomer is ethylene, propylene, butene, hexene, methyl methacrylate, methyl acrylate, butyl acrylate, acrylonitrile, vinyl acetate or styrene.
23 A process as claimed in any one of claims 19 to 22 wherein hydrogen gas is added to the polymerisation to control the average molecular weight of the produced polymer.
Polyethylene powder containing a catalyst comprising a nitrogen-containing Fe complex wherein the Fe concentration is 1.03 to 0.11 parts by weight of Fe per million parts by weight of polyethylene.
A nitrogen-containing transition metal compound comprising the skeletal unit depicted in Formula B
The complex 2,6-diacetylpyridinebis(2,4,6-trimethylanil)FeCl2.
A nitrogen-containing transition metal compound comprising the skeletal unit depicted in Formula Z:
A nitrogen-containing transition metal compound comprising the skeletal unit depicted in Formula T:
A compound having the general Formula E as follows:
A compound having the general Formula P as follows:
Dependencies are inferred from the claim text.