Precipitation of Palladium from Cyanide solution

[furkanly00]

Dear Friends,


I have a problem with a solution and need your help. There is a cyanide solution and it contains 2 gram/liter palladium. Normally I can precipitate the gold from cyanide with Zinc, but it does not work for palladium.

Is there any idea how can I recovery/precipitate the palladium from cyanide solution?

If you can help me with that problem I will be grateful.

Thanks,

Furkan.

 

[Lino1406]

Zinc should work, as well as aluminum, sodium hydrosulphite. Maybe you need to add caustic soda, raise alkalinity

 

[snoman701]

or add cyanide to have free cyanide to start the reaction

 

[AshesoftheUniverse]

Palladium Cyanide is a very insoluble compound. It isn't likely to be but a few molecules in aqueous solution at room temperature.
It was originally the method to isolate Palladium by Wollaston in the early 1800s, by adding Mercury Cyanide to a mixed solution of PGMs, the Palladium dropping out of solution as the Cyanide (a solid)
It has the lowest Pk of any known compound, thus the precipitation is essentially complete.