Flotation Separation of Platinum,Palladium,Rhodium and Gold from Stannous Chloride-Cetyltrimetheylammonium Bromide System in the Presence of Sodium Chloride

The flotation separation of platinum, palladium, rhodium and gold was studied in aqueous solution containing SnCl2 and cetyltrimetheyl ammonium chloride in the presence of NaCl and HCl medium. After heating a solution of 0.10 mol/L SnCl2, 1.0×10-3 mol/L cetyltrimetyl ammonium chloride, 0.1 g/mL NaCl and 0.24 mol/L HCl with water bath at 60 ℃ for 10 min the percent separation of platinum, palladium, rhodium and gold was 95.2%～98.0%、97.3%～97.6%、93.4%～97.1%和96.6%～99.1%, respectively with flotation separation. The separation results of the synthetic samples show that the method can separate platinum, palladium, rhodium and gold from a great amount of base metals such as Fe(Ⅲ), Pb(Ⅱ), Al(Ⅲ), Cu(Ⅱ), Zn(Ⅱ), Ca(Ⅱ), and this method has been also used for the separation platinum, palladium, rhodium and gold from real samples with satisfactory results.