Continuous preparation of secondary amines from nitriles using a

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

1990-09-17

1992-07-14

Robinson, Allen J.

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

Organic compounds

Amino nitrogen containing

564470, 564493, C07C20900

Patent

active

051304910

ABSTRACT:
A method for producing secondary amines, particularly fatty secondary amines such as ditallowamine from fatty nitriles, such as tallow nitrile over a nickel catalyst promoted with copper, chromium and molybdenum has been discovered. The reaction gives high selectivity of 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. The same catalyst may be used in both steps if a two stage process is used.

REFERENCES:
patent: 2781399 (1957-02-01), Shapiro
patent: 2811556 (1957-10-01), Shapiro
patent: 3733325 (1973-05-01), Yeakey
patent: 4248801 (1981-02-01), Tomidokoro et al.
Tomidokoro, S., et al., "Preparation of Long-Chain Secondary Amines by Reduction of Nitriles," Chemical Abstracts, 106:175777t, Japan Tokkyo Koho JP 62 00,901; 1987, p. 671.

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