Selective Co(II) and Ni(II) Separation Using the Trihexyl(tetradecyl)phosphonium Decanoate Ionic Liquid.

ABSTRACT: The room temperature ionic liquid trihexyl(tetradecyl)phosphonium decanoate ([P₆₆₆₁₄][Dec]) was employed in the liquid-liquid extraction of Co(II) from hydrochloric acid solutions in the presence of Ni(II). The extraction performance in liquid-liquid separations showed a strong dependence on the acid content of the feed aqueous solution. The best performance in terms of extracted cobalt and selectivity was obtained when the feed contained a HCl concentration above 6 M On the contrary, when the experiment was performed in absence of HCl, a lower extraction and Co/Ni selectivity were obtained. This behavior has been rationalized by considering the protonation of the [Dec]^- anion and the different Co(II)/Ni(II) speciation in HCl media. Moreover, polymer inclusion membran

SUBMITTER: Kovacevic A 

PROVIDER: S-EPMC11477661 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature