Nickel having high ligand-complexation activity and methods for making the same
AssigneeInvista North America S.A R.L.
InventorsJoan Fraga-Dubreuil, Vinay Medhekar, John A. Turner, Keith Whiston
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Abstract
Disclosed are nickel-containing complexation precursors having high complexation activity for bidentate phosphite ligands. Also disclosed are methods of making the complexation precursors. The disclosed method of generating the nickel-containing complexation precursor includes including contacting a nickel starting material with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of sulfide.
Claims19
A method of improving the reactivity of nickel for complexation with a diphosphate ligand, the method comprising:
- contacting a nickel starting material comprising a reducible sulfur source with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of amorphous nickel sulfide (NiSx), the contacting comprising maintaining a temperature of about 200° C. to about 350° C.
A nickel-containing complexation precursor comprising about 1,500 ppmw to about 500,000 ppmw amorphous nickel sulfide (NiSx).
A method for making a complex comprising nickel and a phosphorus-containing ligand, said method comprising contacting nickel metal containing from 1,500 ppmw to 500,000 ppmw as amorphous nickel sulfide (NiSx) with Ligand (V):
Dependencies are inferred from the claim text.