Catalyst passivation in production of amines

Details Catalyst passivation in production of amines Catalyst passivation in production of amines

1979-12-26

1981-01-27

Doll, John

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

Organic compounds

Amino nitrogen containing

252477Q, C07C 8512, C07C 8511, C07C 8526

Patent

active

042474817

ABSTRACT:
This is an improvement in a process for the production of an amine such as hexamethylenediamine from a nitrile such as adiponitrile where the nitrile is hydrogenated under pressure in the presence of a Raney nickel catalyst, the reaction being conducted in a reactor from which is discharged a product stream containing both the amine and the Raney nickel catalyst. The improvement comprises charging to the process discharge stream containing the product amine and the Raney nickel catalyst, a nitroaromatic compound, whereby the Raney nickel catalyst is passivated and catalytic decomposition of the amine is substantially decreased.

REFERENCES:
patent: 3821305 (1974-06-01), Bartalini et al.
patent: 4176092 (1979-11-01), Birkenstock et al.

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