Hydrogenation of nitriles in absence of secondary reaction suppr

Details Hydrogenation of nitriles in absence of secondary reaction suppr Hydrogenation of nitriles in absence of secondary reaction suppr

1975-07-16

1977-01-18

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252472, 2605705P, 260578, 260583P, 260584C, 260563C, C07C 8714

Patent

active

040039331

ABSTRACT:
Nitriles are converted to primary amines in the absence of a secondary amine formation suppressant by hydrogenation of the nitriles in the presence of a catalyst comprising at least one Group VIII metal promoted by at least one Group IVB metal. The process is applicable to the hydrogenation of nitriles having the formula (A).sub.x R(C.tbd.N).sub.y wherein x is zero or an integer and y is an integer, R is a hydrocarbyl radical having from 2 to 30 carbons and a valence of x + y and each A is selected from the group consisting of --OR' and --NR'.sub.2 wherein R' is hydrogen or a hydrocarbyl radical having from 1 to 10 carbon atoms. The process is particularly applicable to the hydrogenation of olefinically unsaturated dinitriles. The complete hydrogenation of olefinically unsaturated nitriles can be carried out in two sequential stages, utilizing a Group IVB metal promoted Group VIII metal catalyst in the first stage to achieve a reduction of the nitrile unsaturation and a suitable catalyst, e.g. ruthenium, in the second stage to achieve a reduction of the olefinic unsaturation.

REFERENCES:
patent: 3350439 (1967-10-01), Feldman et al.
patent: 3408397 (1969-10-01), Feldman et al.
patent: 3898286 (1975-08-01), Drake
Freidlin et al. Chem. Abstracts 55(1961) col. 18578a.

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