Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-11-17
1983-03-22
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252429B, 252431C, 252431P, B01J 3112
Patent
active
043774997
ABSTRACT:
Ethylene is oligomerized to even numbered alpha-monoolefins principally in the C.sub.4 to C.sub.40 range with minimal concomittant production of high molecular weight polyethylene by reacting ethylene in a diol solvent in an oligomerization reaction zone at elevated pressure with a nickel complex catalyst composition produced by combining in the reaction zone, (a) a stable preformed complex of nickel, ethylene and hydride in a diol solvent, said complex being prepared by contactng in a diol solvent and in the presence of ethylene, a nickel salt, a base and a boron hydride transfer agent and (b) a suitable bidentate ligand; the stable nickel complex solution and the bidentate ligand being added in separate portions to the reaction zone. These stable complexes of nickel, ethylene and hydride in diol solution are considered to be novel oligomerization catalyst precursor compositions.
REFERENCES:
patent: 3551467 (1970-12-01), Arakawa et al.
patent: 3676523 (1972-07-01), Mason
patent: 3686351 (1972-08-01), Mason
patent: 3737475 (1973-06-01), Mason
Gum Clarence R.
O'Donnell Albert E.
Garvin Patrick
Jecminek Albert A.
Reper Ronald R.
Shell Oil Company
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