Separation of Nickel and Cobalt by Alamine336 from Hydrochloric Acid Solutions

摘要

Solvent extraction experiments with Alamine336 from hydrochloric acid solutions containing cobalt and nickel have been performed to separate both metal ions- Cobalt was preferentially extracted from nickel by Alamine336 due to the difference betwen the complex formation constant of cobalt-chloro and nickel-chloro complex. The extraction percentage of cobalt and nickel were greatly affected by the concentration of chloride ion but were independent of solution pH when the chloride salt of Alamine336 was used as extractant. In the experimental ranges, the separation factor was increased with reaction temperature. The stripping percentage of cobalt decreased with the concentration of HCl in stripping solution.