Non-aqueous solvent extraction of indium from an ethylene glycol feed solution by the ionic liquid Cyphos IL 101: speciation study and continuous counter-current process in mixer-settlers.

ABSTRACT: A solvometallurgical process for the separation of indium(iii) and zinc(ii) from ethylene glycol solutions using the ionic liquid extractants Cyphos IL 101 and Aliquat 336 in an aromatic diluent has been investigated. The speciation of indium(iii) in the two immiscible organic phases was investigated by Raman spectroscopy, infrared spectroscopy, EXAFS and ¹¹⁵In NMR spectroscopy. At low LiCl concentrations in ethylene glycol, the bridging (InCl₃)₂(EG)₃ or mononuclear (InCl₃)(EG)₂ complex is proposed. At higher lithium chloride concentrations, the first coordination sphere changes to two oxygen atoms from one bidentate ethylene glycol ligand and four chloride anions ([In(EG)Cl₄]^-). In the less polar phase

SUBMITTER: Deferm C 

PROVIDER: S-EPMC9055152 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature