Purification of indium by solvent extraction with undiluted ionic liquids

Abstract

The ionic liquids Cyphos IL 101 and Aliquat 336 are environmentally friendly extractants for purification of indium. Precipitation stripping with NaOH was used to recover indium after extraction.

Amberlite XAD Resins Impregnated with Ionic Liquids for Au(III) Recovery

“…The kinematic viscosity of the phosphonium ionic liquids decreases when the size of the counter anion increases: for example the viscosity decreases from 1824 mPa s for Cyphos IL101 to 806 mPa s for Cyphos IL104 and 312 mPa s for Cyphos IL109 . These values are affected by the presence of solvents, water, and temperature that tend to decrease the viscosity of the IL; on the other hand, the extraction of metal ions tends to increase the viscosity of the IL …”

“…[38] These values are affected by the presence of solvents, water, and temperature that tend to decrease the viscosity of the IL [39] ; on the other hand, the extraction of metal ions tends to increase the viscosity of the IL. [40] Figure 4 shows that for comparable IL loading (weight basis; i.e., 400 mg IL g À1 EIR) the kinetic profiles were very similar for Amberlite XAD-7 impregnated with both Cyphos IL101 and Cyphos IL104: the shift in the equilibrium relative concentration is only due to the lower molar amount of Cyphos IL104 (higher MW). Surprisingly, the comparison of the intraparticle diffusion coefficient shows that mass transfer was more efficient with Table 1.…”

Multi‐Gram Scale Synthesis of 1,2,3‐Triazolium Ionic Liquids and Assay of Their Resistance towards Bases

“…However, the resulting ionic liquids are all very viscous and water‐soluble, making them rather unsuited as reaction media and extractants . For similar reasons, long‐chain phosphonium ionic liquids are also compatible with strong bases without the formation of phosphine oxides . However, they suffer from increased viscosities and lower loading capacities in solvent extraction, due to the large volume of the cation .…”

“…For similar reasons, long‐chain phosphonium ionic liquids are also compatible with strong bases without the formation of phosphine oxides . However, they suffer from increased viscosities and lower loading capacities in solvent extraction, due to the large volume of the cation . In addition, conflicting reports do exist, as some authors report observing the α‐deprotonation of long‐chain phosphonium ionic liquids, resulting in the formation of a nonionic phosphorane , …”

Separation and recovery of gallium(III) ions from aqueous phase by liquid--liquid extraction using a novel extractant, Cyphos IL 101

“…and Aliquat 336 were employed for extraction and purification of indium from chloride medium. 30 Quantitative extraction of In(III) was achieved in the HCl concentration range of 0.5-12.0 mol/L for both the ionic liquids.…”