Solvent Extraction of Cobalt Chloride from Strong Hydrochloric Acid Solutions by Alamine336

摘要

Solvent extraction reaction of cobalt by Alamine336 from strong hydrochloric acid solution was identified by analyzing the solvent extraction data reported in the literature. Analysis of the data by graphical method revealed that Alamine336 took part in the solvent extraction reaction as a monomer in the concentration ranges, [Co(II)]: 0.0169-0.102 M, [Alamine336] ; 0.02-1.75 M, and [HC1 ]: 5- 10 M. The following solvent extraction reaction and equilibrium constant was obtained from the experimental data by considering the activity coefficients of chemical species present in the aqueous phase. Co~(2+)+2Cl~-+R_3NHCl_(org) =CoCl_3 R_3NH_(org), K_(ex)=2.21 The distribution coefficients of cobalt predicted in this study agreed well with those reported in the literature.