The solvent extraction behaviour of platinum (II) with P-50 oxime in aqueous chloride solutions

Solvent extraction separation and recovery of palladium and platinum from chloride leach liquors of spent automobile catalyst

“…Literature survey revealed that the extraction of PGMs, in particular of Pd and Pt, have been reported extensively by many researchers from chloride media, mostly from synthetic solutions at low metal concentrations employing extractants such as TBP [7] amines [8][9][10][11][12][13][14], oximes [15][16][17], thio-phosphoric acid [18], phosphonic acid [19], thiophosphinic acid [20,21], TIBPS [22], sulphoxides [23], thiol [24], thiourea [25], Most of these studies report extraction behavior of metals and species. A review of methods of processing and recovery of PGMs from sulfide ores/concentrates [3,6,8] and spent catalysts of fertilizer and petrochemical industry [2,[26][27][28] are reported.…”

Extraction and separation of Pt(IV)/Rh(III) from acidic chloride solutions using Aliquat 336

“…The extraction mechanism corresponds to an anion exchange, in which a complex of stiochiometric formula (R 3 NH + ) 2 PtCl 6 2À is formed in the organic phase liberating at the same time Cl À ions in the aqueous phase [9]. Some extractants are reported for extraction separation of Pt from Pd [10][11][12][13][14][15][16][17][18][19][20] but very less number of extractants is utilized for separation of platinum from rhodium [21][22]. The LLE literature reviewed showed that, despite a large number of studies, no system has been identified as yet to yield quantitative extraction of rhodium from concentrated solutions [23][24][25][26][27].…”

Liquid–liquid extraction/separation of platinum(IV) and rhodium(III) from acidic chloride solutions using tri-iso-octylamine

“…The extraction mechanism corresponds to an anion exchange, in which a complex of stoichiometric formula (R 3 NH + ) 2 PtCl 6 2− is formed in the organic phase liberating at the same time Cl − ions in the aqueous phase [9]. Some extractants are reported for extraction separation of platinum from palladium [10][11][12][13][14][15][16][17][18][19][20] but very less number of extractants is utilized for separation of platinum from rhodium [21,22]. The LLE literatures reviewed showed that, despite a large number of studies, no system has been identified as yet to yield quantitative extraction of rhodium from concentrated solutions [23][24][25][26][27].…”