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
Clio Deferm, Bieke Onghena, Viet Tu Nguyen, Dipanjan Banerjee, Jan Fransaer, Koen Binnemans
Abstract
complex independent of the LiCl concentration. After the number of theoretical stages had been determined using a McCabe-Thiele diagram for extraction by Cyphos IL 101, the extraction and scrubbing processes were performed in lab-scale mixer-settlers to test the feasibility of working in continuous mode. Indium(iii) was extracted quantitatively in four stages, with 19% co-extraction of zinc(ii). The co-extracted zinc(ii) was scrubbed selectively in six stages using an indium(iii) scrub solution. Indium(iii) was recovered from the loaded less polar organic phase as indium(iii) hydroxide (98.5%) by precipitation stripping with an aqueous NaOH solution.
Topics & Concepts
ChemistryIndiumIonic liquidInorganic chemistryEthylene glycolAqueous solutionChlorideDiluentExtraction (chemistry)Nuclear chemistryChromatographyOrganic chemistryCatalysisExtraction and Separation ProcessesIonic liquids properties and applicationsCrystallization and Solubility Studies