Synergistic solvent extraction of manganese(II) with a mixture of Cyanex 272 and Cyanex 301 from chloride solutions

• Mixture of Cyanex 272 and Cyanex 301 has synergism on the extraction of Mn(II).
• The highest synergistic effect was obtained at Cyanex 272 mole fraction of 0.6.
• The equilibrium constant of the solvent extraction reaction was estimated.
• This mixture has a potential for separating Mn from other divalent metal ions.

The solvent extraction of manganese(II) has been studied from chloride solutions using a mixture of Cyanex 272 and Cyanex 301 dissolved in kerosene. The mixture has shown a significant synergistic effect at XCyanex 272 = 0.6. The synergistic enhancement factor was calculated to be 14. The extracted species in the organic phase was found to be MnH2A2B2 using slope analysis method. Stripping experiments showed that manganese could be recovered using dilute sulphuric acid solutions from the loaded mixture. The mixture has a potential for the separation of Mn(II) from other associated metals.