Product recovery

Details Product recovery Product recovery

1977-02-23

1978-03-21

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604658R, 2604659, C07C12002

Patent

active

040803740

ABSTRACT:
Process for the recovery of reactants and products from a catalyst containing residue, e.g., a residue obtained from the hydrocyanation of olefins such as butadiene using a zero-valent nickel complex as the hydrocyanation catalyst wherein the complex is promoted with a triarylborane or a zinc compound such as zinc chloride. The residue is mixed, i.e., extracted with a solvent consisting essentially of monoolefinically unsaturated nitriles, e.g., 3-pentenenitrile. The resulting extract containing the pentenenitriles and the desired products, e.g., adiponitrile and its precursors is separated from the insoluble materials consisting essentially of catalyst residue and at least a portion thereof is returned to the hydrocyanation process.

REFERENCES:
patent: 3496215 (1970-02-01), Drinkard, Jr. et al.
patent: 3526654 (1970-09-01), Hildebrand
patent: 3538142 (1970-11-01), Drinkard, Jr. et al.
patent: 3542847 (1970-11-01), Drinkard, Jr. et al.
patent: 3676475 (1972-07-01), Drinkard, Jr.
patent: 3697578 (1972-10-01), Pasquino et al.
patent: 3752839 (1973-08-01), Drinkard, Jr. et al.

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