Catalyst

Details Catalyst Catalyst

B - Operations, Transporting

01

J

252/10, 252/53

B01J 23/72 (2006.01) B01J 23/94 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1218980

9 B 32901 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 6 molar. Alternatively or additionally the terminal pH is greater than 1Ø the resulting solution is pure enough for reconversion to catalyst by co-precipitation.

463863

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