Production of aromatic diamino compounds using a modified Raney

Details Production of aromatic diamino compounds using a modified Raney Production of aromatic diamino compounds using a modified Raney

1986-10-10

1988-12-20

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

564421, C07C 8511

Patent

active

047926260

ABSTRACT:
Aromatic diamino compounds are produced by hydrogenating the corresponding dinitro compounds in the presence of a modified Raney catalyst. The modified Raney catalyst is obtained by treating an alloy made up of 50-95 wt % of aluminum, 4-45 wt % nickel and/or cobalt and 1-46 wt % of at least one modifying metal with an alkali material. The modifying metal is selected from the metals of the first, fourth, fifth, sixth, seventh and eighth subgroups of the Periodic Table of Elements. The hydrogenation is preferably carried out at from 170.degree. to 250.degree. C. and a pressure of 15-50 bar. The heat generated during hydrogenation is preferably used to produce steam.

REFERENCES:
patent: 3544485 (1970-12-01), Taira et al.
patent: 3761521 (1973-09-01), Alheritiere et al.
patent: 3895065 (1975-07-01), Alheritiere et al.
patent: 4287365 (1981-09-01), Becker et al.

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