Liquid-Liquid Extraction of Palladium (II) from Hydrochloric Acid Solutions by Dihexyl-Sulphide and -Sulphoxide

The extraction of palladium (II) from hydrochloric acid solutions containing sulphur compounds (dihexyl sulphide, DHS, and dihexyl sulphoxide, DHSO) have been investigated under different conditions. As a result, it has been found that the extraction efficiency for palladium (II) of DHS and DHSO is in the order DHS>DHSO. The distribution coefficients for DHS and DHSO decrease with increasing aqueous acidities, and approach the minima and then rise. Furthermore the equilibrium equations for the extraction of palladium (II) from hydrochloric acid solutions by DHS and DHSO are proposed on the bases of the results obtained.