Radiotracer study of the effects of organophosphorus donors on the extraction of iron(III) with 2-hydroxy-N-phenylbenzamide in n-butanol

The State of Critical and Strategic Metals Recovery and the Role of Nuclear Techniques in the Separation Technologies Development: Review

“…Fe 3+ was spiked with 59 Fe in the presence of this chelating neutral and reagent organophosphorus compounds such as TOPO, TBP, and triphenylphosphine oxide (TPPO). With the addition of various organophosphorus chemicals, the distribution ratio of the extracted Fe 3+ was found to increase with HA [113]. The study also discovered that the extent of Fe 3+ absorption into the organic phase increased with temperature, both as the binary complex [FeA 2 Cl (H 2 O)] and as the ternary complex [FeA 2 Cl(S)].…”

“…Species are recovered using a mixture of extractants, with the distribution ratio being higher than the sum of the individual extractant's distribution ratios. The synergistic effect improves not only extraction selectivity and efficiency, but also the stability of the extracted complexes, eliminating the emulsification and creation of the third phase, and boosting the extraction rate [113].…”

“…Fe 3+ removal from aqueous acidic solutions by liquid-liquid extraction has received a lot of attention in recent decades. Using the radiotracer technique, the behavior of Fe 3+ extraction from an aqueous chloride solution using 2-hydroxy-N-phenylbenzamide (HA) in n-butanol under the conditions of numerous organophosphorus donors such as triphenylphosphine oxide, trioctylphosphine oxide, and TBP at pH 2.0 was examined [113]. Fe 3+ was spiked with 59 Fe in the presence of this chelating neutral and reagent organophosphorus compounds such as TOPO, TBP, and triphenylphosphine oxide (TPPO).…”

“…The neutral donor's synergistic impact is due to the replacement of the coordinated water molecule from the metal's primary coordination sphere. The findings from a study of the synergistic effect of organophosphorus donors on the chelating extraction of Fe 3+ in an organic solvent is promising for hydrometallurgy [113]. Besides solvent extraction, adsorption is another key technique that can perform a vital role in the recovery of metals.…”