Continuous reduction of a hindered nitro moiety in aliphatic nit

Details Continuous reduction of a hindered nitro moiety in aliphatic nit Continuous reduction of a hindered nitro moiety in aliphatic nit

1992-07-02

1994-03-22

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

544384, 5483001, 564448, 564454, 564512, C07C20934

Patent

active

052966321

ABSTRACT:
Nitro polyamines, and especially dinitro polyamines, can be readily reduced by a catalyst of zerovalent nickel on silica where the silica contains not more than 10% alumina and where the nickel content of the finished catalyst may be as high as 85%. The reductions can be performed under relatively low temperatures between 40.degree. and 120.degree. C. to avoid the problem of heat lability of the reactant nitro polyamines. Hydrogenations proceed with good conversion as well as good selectivity and the method offers a means of continuous hydrogenation of nitro polyamines.

REFERENCES:
patent: 2174498 (1939-09-01), Johnson
patent: 2393825 (1946-01-01), Senkus
patent: 3470250 (1969-09-01), Patterson et al.
patent: 3470252 (1969-09-01), Doyle et al.
patent: 3917705 (1975-11-01), Swanson et al.

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