GammaFunction - 29-1-2013 at 17:32
I acquired some Pd alloy for jewelry. I'm thinking it would be interesting to try to extract the Pd from it. The alloy is 25% Pd, 65% Ag, remaining
Cu and Ni.
My idea is:
dissolve alloy in Nitric Acid, since Aqua Regia can't be used on Ag; vent or neutralize NO2 fumes carefully
boil away to get rid of remaining nitric oxides (again, vent or neutralize fumes)
precipitate out the Ag and Pd using a copper wire, and filter out resulting metal dust
re-dissolve metal dust in NA, and again get rid of acid leaving only Ag and Pd salts
precipitate Ag as AgCl using chloride ions (HCl or NaCl), leaving only Pd in solution
precipitate Pd as dust using copper wire
The sticking point is whether the Pd will slow the dissolution so much as to be impracticable.
What do people think?
cyanureeves - 29-1-2013 at 18:11
if that works i dont really know but 25% Pd is sure as hell worth going after and i would probably ruin the process by going from step 1 to 5 .i would
get rid of the silver first then just deal with the rest but i dont know if chloride drops palladium like sodium chlorate does.so yeah i would
probably ruin it but still have to say its worth getting the silver out of the more valuable metal.
crazyboy - 29-1-2013 at 18:17
You might have better luck with something like this. They aren't exhaustive but they should give you a better idea of what to do.
https://www.youtube.com/watch?v=FWftjRnNrNw
https://www.youtube.com/watch?v=Ltrltl4iau0
https://www.youtube.com/watch?v=neR5qMNIS78