Abstract: This invention relates to a method of interseparation of platinum group metals, and in particular to the use of chromatographic media for interseparation of the PGMs from a reduced feed which are eluted in the order of iridium, rhodium and ruthenium together, followed by palladium, platinum and osmium.

Abstract: A method for the separation of rhodium and/or iridium from a solution containing ruthenium said method comprising the steps of having a rhodium chloride complex in oxidation state III, converting the ruthenium to nitrosyl complexes in divalent states and recovering rhodium and/or iridium.

Abstract: This invention relates to the recovery of platinum group metals and Au and Ag from high sulphur content base metal sulphide ore residues and also to the separation of Ag from the other precious metals referred to.The process for the recovery of platinum group metals, silver and gold from a base metal sulphide-containing leach residue comprises:(a) smelting the said leach residue with a flux to produce:(i) a slag containing FeO, CaO and SiO.sub.

Abstract: The separation and purification of palladium present in aqueous solutions which also contain other platinum group metals is accomplished by a process which involves contacting an acidic aqueous solution containing the palladium and other platinum group metals with an organic phase containing an oxime extractant and an anionic phase transfer material substantially soluble in the organic phase and substantially insoluble in the aqueous solution, and removing from contact with the acidic solution the organic phase containing substantially all of the palladium.

Abstract: This invention relates to refining platinum group metal concentrates and the separation therefrom of silver and of the majority of base metals with which they naturally occur. In more detail the process comprises the steps of:(a) contacting a solid particulate mixture of base, silver and precious metal components, any of which components may be in metallic or chemically combined form, with a halogen-containing gas at a temperature which is sufficiently high for the base metal and silver components to form their halides and for the said halides substantially to volatilize from the said solid mixture, and(b) removing the said volatilized halides from the solid precious metal-containing component which remains.

Abstract: This invention relates to the treatment of effluents; more particularly it relates to the destruction of compounds or complexes which are normally very stable and which pose problems in the purification and control of effluents.Specifically, the process for recovering metal present as a stable complex in an aqueous effluent comprises the steps of:(a) adjusting the pH of the effluent as necessary to a pH of 6.+-.0.5;(b) removing by filtration a substantial quantity of base and amphoretic metals from the so treated effluent of step (a);(c) heating the filtrate from step (b) to a temperature in the region of 70.degree. C.;(d) electrolyzing the heated filtrate from step (c) at a substantially constant temperature maintained at least at 70.degree. C. so as to destroy the stable complexes and thereby precipitate the said metals in the form of hydrated oxides or hydroxides, and(e) filtering-off said precipitate.