METHOD OF JOINT SEPARATION OF PLATINUM METAL Russian patent published in 2009 - IPC C22B11/00 C22B3/26 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydrometallurgy, particularly it relates to method of joint separation of platinum metal (PM). Method includes several stages: first stage is implemented for leaching of initial material, containing PM and impurity element. The second stage is implemented for removing of impurity elements from alkaline solution from leaching by solvent extraction, the third stage - for removing of palladium from raffinate. The fourth stage is implemented for removing from raffinate of impurity element cations by extraction by dissolvent. The fifth stage is implemented for extraction from the raffinate of platinum by hydrolysis, the sixth stage - for extraction from ruthenium settling by leaching and the seventh stage - for extraction of iridium by solvent extraction with receiving of desorbed alkaline solution, containing iridium, and raffinate containing rhodium.

EFFECT: effective removing of impurity elements, with each of separated PM allows grade enough for that it could serve in the capacity of commercial product.

18 cl, 14 tbl, 1 ex, 3 dwg