| 摘要 |
<p>A method of separating cobalt from impurity elements including manganese in an aqueous leach solution, the process including an organophosphoric acid solvent extraction stage including the steps of: (a)contacting the aqueous leach solution with an organic solution comprising an organophosphoric acid in an organic solvent to produce a loaded organic solution containing manganese and, to the extent that they are present, calcium, zinc and copper, and a some cobalt; and an aqueous raffinate solution containing most of the cobalt; (b) scrubbing the loaded organic solution with an aqueous scrub solution containing manganese and copper to produce a scrubbed organic solution containing less cobalt and a spent aqueous scrub solution containing some cobalt, as well as manganese; (c) recycling the spent aqueous scrub solution to step (a); (d) selectively stripping the scrubbed organic solution to remove a portion of the manganese and copper to form the aqueous scrub solution for use in step (b); and (e) recovering cobalt from the aqueous raffinate produced in step (a).</p> |
