Leached catalyst for ammonia synthesis

Details Leached catalyst for ammonia synthesis Leached catalyst for ammonia synthesis

1984-01-03

1985-02-12

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502325, 502328, 502330, 502335, 502336, 423363, B01J 2500

Patent

active

044992041

ABSTRACT:
An improved catalyst for the synthesis of ammonia is described wherein a promoted iron-derived, pre-reduced catalyst is oxidatively leached with a neutral aqueous solution of potassium cyanide. Preferably an organic carboxylic acid such as citric acid is added to the aqueous solution to maintain the pH at about neutral. The resulting leached catalyst has a markedly higher activity than the unleached catalyst. The leached catalyst may be contacted with a cobalt complex or a nickel salt to incorporate cobalt or nickel therein which catalysts are also useful for ammonia synthesis.

REFERENCES:
patent: 1476283 (1923-12-01), Cederberg
patent: 3243386 (1966-03-01), Nielsen et al.
patent: 3809658 (1974-05-01), Csuros et al.

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