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US 5,330,952 AGranted
Catalyst compositions
AssigneeShell Oil Company
InventorEit Drent
Life of this patent
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Abstract
A novel catalyst composition containing a palladium salt, an anion of a non-hydrohalogenic acid with a pk.sub.a of less than 2, a phosphorus bidentate ligand and an acid with a pk.sub.a of at least 4 but less than 6. The catalyst composition effectively polymerizes carbon monoxide and at least one ethylenically unsaturated hydrocarbon to produce linear, alternating polymers.
Claims5
A catalyst composition useful in the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon formed by reacting a palladium compound;
- an anion of a non-hydrohalogenic acid with a pKa of less than 2;
- and a phosphorus bidentate ligand;
- the improvement which comprises including within the catalyst composition an acid with a pKa of above about 4 but less than about 6 selected from the group consisting of benzoic acid, acetic acid, adipic acid, isobutyric acid, heptanoic acid, .alpha.-phenylbutyric acid, pivalic acid, valeric acid, 2,4,,6-trimethylbenzoic acid, pentachlorophenol or pentafluorophenol.
Dependencies are inferred from the claim text.