Separation of Pt from hydrochloric acid leaching solution of spent catalysts by solvent extraction and ion exchange

Recovery of platinum group metals from spent catalysts: A review

“…(Grumett, 2003;Marinho et al, 2011;de Sá Pinheiro et al, 2004;Sun and Lee, 2011). In the leaching system, the nascent chlorine provides high oxidation potential and high concentration of chloride ion, and as a result PGMs are mostly in the form of chloro-complex ( …”

Solvent extraction of palladium(II) from acidic chloride solutions using tri-octyl/decyl ammonium chloride (Aliquat 336)

“…In addition, the reaction between the extractant and chloride ions was determined by employing the slope analysis. Several studies contain extraction data on recovering Pd using Aliquat 336 [5,6].Various reagents for extracting PGMs have been proposed and examined, including TIBPS [7,8], TBP [9,10], phosphonic acid [11,12], thiophosphoric acid [13], thiophosphinic acid [14,15], oximes [16][17][18], sulphoxides [19,20], and amines [21][22][23]. The solvents regularly used to extract solvents include kerosene [24,25], n-hexane [26], xylene [27], toluene [28], benzene [6], and chloroform [29].…”

Liquid Anion Exchange Chromatographic Extraction and Separation of Platinum (IV) with N-Octylaniline as an Metallurgical Reagent: Analysis of Real Samples

“…These are p-octylaniline [12], N-octyl-, N,N-dioctyl aniline and N,N,N-trioctyl anilinium O,O-di(iso-propyl) dithiophosphates [13], N-n-octylaniline [14], Tri-octylamine [15][16][17][18][19][20], alamine 336 [21][22][23][24], alamine 300 [25], quaternary amine base salts [25][26][27][28][29][30][31][32]. However, these amines shows emulsion formation, narrow extraction pH range.…”