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US 4,362,650 AGranted
Catalyst and process for olefin oligomerization
AssigneeInstitut Francais du Petrole
InventorsYves Chauvin, Dominique Commereuc, Gerard Leger, Jean Gaillard, Nhu H. Phung
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Abstract
An improved catalyst composition is obtained by contacting at least one bivalent nickel compound with at least one hydrocarbyl aluminum halide, at least one Bronsted organic acid and at least one anhydride of a carboxylic acid. The composition can be used as a catalyst for olefin oligomerization.
Claims13
In a catalyst composition obtained by contacting, in any order, at least one bivalent nickel compound with at least one hydrocarbylaluminum halide and at least one Bronsted organic acid whose pKa at 20.degree. C. is at most equal to 3,
- the improvement wherein said hydrocarbylaluminum halide has 1.5-2 halogen atoms per atom of aluminum;
- and wherein said contacting is effected in the further presence of at least one carboxylic acid anhydride having the formula (R.sub.3 CO).sub.2 O, wherein each R.sub.3 is independently an unsubstituted or halogen-substituted C.sub.1-20 hydrocarbyl group.
Dependencies are inferred from the claim text.