Catalyst

Details Catalyst Catalyst

1984-09-19

1986-07-15

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502324, 502331, 502342, 502343, 502345, 502346, B01J 2306, B01J 2372, B01J 2374

Patent

active

046007040

ABSTRACT:
A substantially iron-free copper nitrate solution is made by dissolving a copper-containing solid catalyst composition such as a used copper-zinc oxide-alumina methanol synthesis catalyst in nitric acid and controlling the acid concentration at a level such that any iron oxide present in the composition remains substantially undissolved. The acid concentration during dissolution is preferably under 4 molar. Alternatively or additionally the terminal pH is greater than 1.0. The resulting solution is pure enough for reconversion to catalyst by co-precipitation.

REFERENCES:
patent: 3232744 (1966-02-01), Munekata et al.
patent: 3790505 (1974-02-01), Casey et al.
patent: 3793429 (1974-02-01), Queneau et al.
patent: 3966462 (1976-06-01), Posel et al.
patent: 4279781 (1981-07-01), Dienes et al.

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