Nickel-containing ethylene oligomerization catalyst and use thereof
AssigneeShell Oil Company
InventorsDavid Stephen Brown, Richard Edward Robertson
Life of this patent
Estimating the term…
Abstract
A process for the oligomerization of ethylene to a mixture of olefinic products having high linearity is provided, by using a catalyst comprising a reaction product of a simple divalent nickel salt; a boron hydride reducing agent; a water soluble base; a ligand selected from an o-dihydrocarbylphosphinobenzoic acid and alkali metal salt thereof; and, a phosphite.
Claims32
A catalyst composition comprising the product produced by reacting in a polar organic solvent in the presence of ethylene:
- a) a simple divalent nickel salt having a solubility of at least 0.001 mole per liter in said polar organic solvent;
- b) a boron hydride reducing agent;
- c) a water soluble base;
- d) a ligand selected from the group consisting of o-dihydrocarbylphosphinobenzoic acids and alkali metal salts thereof;
- and
- e) a trivalent phosphite.
A process for preparing a catalyst composition which process comprises:
- contacting in a polar organic solvent in the presence of ethylene:
- a) a simple divalent nickel salt having a solubility of at least 0.001 mole per liter in said polar organic solvent;
- b) a boron hydride reducing agent;
- c) a water soluble base;
- d) a ligand selected from the group consisting of o-dihydrocarbylphosphinobenzoic acids and alkali metal salts thereof;
- and
- e) a trivalent phosphite.
A process for the preparation of a mixture of olefinic products having high linearity comprising:
- A) contacting ethylene in a polar organic solvent under conditions effective to produce linear, alpha-olefins in the presence of a catalyst produced by reacting components comprising:
- a) a simple divalent nickel salt having a solubility of at least 0.001 mole per liter in said polar organic solvent;
- b) a boron hydride reducing agent;
- c) a water soluble base;
- d) a ligand selected from the group consisting of o-dihydrocarbylphosphinobenzoic acids and alkali metal salts thereof;
- and,
- e) a trivalent phosphite;
- thereby producing a mixture of olefinic products having high linearity;
- and
- B) recovering the olefinic products having high linearity.
Dependencies are inferred from the claim text.