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A novel process for the recovery of platinum group metals (pgms) from ternary alloys using a hydrocarbonyl process is proposed. The hydrocarbonyl process involves treatment of a chloride solution of the pgms with carbon monoxide at ambient pressure. The results demonstrate that the process can provide high purity pgms from a ternary platinum-rhodium-palladium alloy such as that obtained from palladium-nickel catchment alloys used with platinum-rhodium gauzes during high temperature ammonia oxidation.

The principal possibility of processing the industrial poor collective concentrates of platinum metals using a hydrocarbonyl technology with the selective concentration of platinum metals from poor multicomponent chloride and chloride-sulphate solutions with the subsequent production of pure platinoids is shown.