Continuous preparation of secondary amines from nitriles using c

Details Continuous preparation of secondary amines from nitriles using c Continuous preparation of secondary amines from nitriles using c

1990-04-10

1991-12-24

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

502325, C07C20900

Patent

active

050755064

ABSTRACT:
A method for producing secondary amines, particularly fatty secondary amines such as ditallowamine from fatty nitriles, such as tallow nitrile over a cobalt catalyst promoted with zirconium has been discovered. The catalyst may be supported on kieselguhr or other support. The reaction gives high selectivity or secondary amine over the coproduced primary and tertiary amines. The reaction may be conducted continuously in the presence of ammonia and hydrogen. The secondary amine proportion may be increased by a second stage using the same catalyst as the first stage, but in the absence of ammonia.

REFERENCES:
patent: 1830705 (1931-11-01), Marx et al.
patent: 2781399 (1957-02-01), Shapiro
patent: 2811556 (1957-10-01), Shapiro
patent: 4721811 (1988-01-01), Sherwin et al.
patent: 4950429 (1990-08-01), Vagt et al.
Tomidokoro, S. et al., "Preparation of Long-Chain Secondary Amines by Reduction of Nitriles", Chemical Abstracts, 106:175777t, Japan Tokkyo Koho JP 6200,901; 1987, p. 671.

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