2016
DOI: 10.1039/c5dt04876a
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Recovery of rhodium with a novel soft donor ligand using solvent extraction techniques in chloride media

Abstract: Rhodium remains a high value platinum group metal that has key applications in electronics, catalysts, and batteries. To provide a useful tool for Rh isolation, a novel tridentate ligand utilizing soft N and S donors was designed to specifically extract Rh. The synthesis, complexation kinetics, and liquid-liquid extraction studies were performed to explore the overall process and recovery of Rh from chloride media.

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Cited by 7 publications
(2 citation statements)
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“…At relatively high HCl concentrations (>1 mol dm À3 ), anionic Rh chloride complexes [RhCl x (H 2 O) 6Àx ] 3Àx (x ¼ 4-6) are the major species present and some binuclear complex [Rh 2 Cl 9 ] 3À has been also reported. [6][7][8][9] Recovery of anionic Rh complexes from acidic leachates has been investigated by separation methods including cementation, 10 calcination, 11 precipitation, [12][13][14] adsorption, [15][16][17] solid-liquid extraction, 18 liquid-liquid extraction, 19,20 and membrane transport. 21 Among these methods, liquid-liquid extraction (also called solvent extraction) has been widely used as an analytical separation method in laboratories and as a rening methods in industries owing to advantages, such as ease of scale-up and the possibility of continuous operation.…”
Section: Introductionmentioning
confidence: 99%
“…At relatively high HCl concentrations (>1 mol dm À3 ), anionic Rh chloride complexes [RhCl x (H 2 O) 6Àx ] 3Àx (x ¼ 4-6) are the major species present and some binuclear complex [Rh 2 Cl 9 ] 3À has been also reported. [6][7][8][9] Recovery of anionic Rh complexes from acidic leachates has been investigated by separation methods including cementation, 10 calcination, 11 precipitation, [12][13][14] adsorption, [15][16][17] solid-liquid extraction, 18 liquid-liquid extraction, 19,20 and membrane transport. 21 Among these methods, liquid-liquid extraction (also called solvent extraction) has been widely used as an analytical separation method in laboratories and as a rening methods in industries owing to advantages, such as ease of scale-up and the possibility of continuous operation.…”
Section: Introductionmentioning
confidence: 99%
“…The key to the successful extraction and separation is the performance of the extractant used. Recently, various extractants for PGMs, including Rh, have been developed. However, the extraction of Rh has been a big challenge to date because its ligand exchange is well known to be inert and the chloro-complex species in the aqueous chloride media change drastically depending on the chloride ion concentration …”
Section: Introductionmentioning
confidence: 99%