Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-02-23
1978-04-04
Douglas, Winston A.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252412, 2604658R, 2604659, 423143, 423364, C07F 502, C07F 1504, C01C 3111, C07C12002
Patent
active
040828115
ABSTRACT:
Process for the recovery of catalyst components from a catalyst residue, e.g., a residue obtained from the hydrocyanation of olefins, e.g., butadiene, using a zero-valent nickel complex promoted with a triarylborane as a catalyst by contacting the residue with an essentially aqueous solution of nitrogen-containing base, e.g., ammonium hydroxide to form and precipitate the amine adduct of the triarylborane, while maintaining other catalyst components in solution and thereafter separating the precipitate from the resultant solution. Nickel can be separated from the resultant solution by reducing the concentration of amine in the solution to thereby precipitate a nickel cyanide complex, e.g., nickel (II) cyanidemonoammine.
REFERENCES:
patent: 3496218 (1970-02-01), Drinkard, Jr.
patent: 3651146 (1972-03-01), Von Schriltz
patent: 3652641 (1972-03-01), Druliner
patent: 3766241 (1973-10-01), Drinkard, Jr.
patent: 3818068 (1974-06-01), Wells
patent: 3859327 (1975-01-01), Wells
patent: 3864380 (1975-02-01), King et al.
Douglas Winston A.
E. I. Du Pont de Nemours and Company
Konopka P. E.
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