Process for the preparation of a nickel/phosphorous ligand...

Details Process for the preparation of a nickel/phosphorous ligand... Process for the preparation of a nickel/phosphorous ligand...

2005-01-18

2005-01-18

Bell, Mark L. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S169000, C556S018000, C556S138000

Reexamination Certificate

active

06844289

ABSTRACT:
Process for preparing a nickel/ligand catalyst in which a crude ligand mixture is contacted with at least one member selected from the group consisting of (i) a weakly acidic organic resin, (ii) a weakly basic organic resin, (iii) a high-surface-area organic resin, (iv) activated carbon, (v) aluminosilicate zeolite, (vi) a two phase solvent system for liquid-liquid extraction and (vii) a Lewis acid; recovering a solution containing a ligand of the formulain-line-formulae description="In-line Formulae" end="lead"?(R1O)2POZOP(OR1)2; andin-line-formulae description="In-line Formulae" end="tail"?contacting the solution with nickel chloride in the presence of a nitrile solvent and a reducing metal which is more electropositive than nickel to produce the nickel/ligand catalyst.

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