Method and apparatus for separating copper from chromite

Details Method and apparatus for separating copper from chromite Method and apparatus for separating copper from chromite

1992-02-18

1992-10-27

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

266217, C22B 3400

Patent

active

051586029

ABSTRACT:
The present invention is a method for separating copper (II) from chromite in a material containing both copper (II) and chromite. The present invention separation method essentially comprises the steps of: (a) extracting the material with a combined hot vapor-liquid phase of volatile carboxylic acid to dissolve the copper (II) as cupric carboxylate, thereby removing the copper (II) from the material; and (b) crystallizing the cupric carboxylate. The present invention method may further comprise the step of reducing the chromite in the remaining material to chromium metal by reduction with hydrogen at about 1500.degree. C. Preferably, the substantially volatile carboxylic acid is acetic acid. The present invention method and apparatus is useful for treatment of exhausted catalyst pellets containing copper (II) and chromite and recovering both copper and chromium in a useful form from the pellets.

REFERENCES:
patent: 2316330 (1943-04-01), Hawk
patent: 2905546 (1959-09-01), Harris

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