Selective hydrogenation of aliphatic dinitriles to omega-aminoni

Details Selective hydrogenation of aliphatic dinitriles to omega-aminoni Selective hydrogenation of aliphatic dinitriles to omega-aminoni

1984-05-04

1986-07-22

Brust, Joseph Paul

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

Organic compounds

Nitriles

260239B, 546184, 548579, 564491, 564492, C07C12143

Patent

active

046018590

ABSTRACT:
A dinitrile is hydrogenated to an omega-aminonitrile with hydrogen with a supported highly dispersed rhodium catalyst and only ammonia present. The catalyst is prepared by hydrolyzing a rhodium(III) halide or nitrate with strong aqueous base at elevated temperatures, drying the supported rhodium hydroxide at elevated temperatures and intimately contacting with hydrogen the dried product with hydrogen at 260.degree.-360.degree. C. High conversions, selectivity to aminonitrile and long catalyst service times and catalyst recyclability are achieved in the absence of an aprotic solvent.

REFERENCES:
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patent: 3880928 (1975-04-01), Drake
patent: 4362671 (1982-12-01), Diamond et al.
patent: 4383940 (1983-05-01), Murtha et al.
patent: 4389348 (1983-06-01), Diamond et al.
Freifelder, J.A.C.S., 82, (1960), pp. 2386-2389.
Montecatin: C.A., 78, (1973), 29279u.

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