Pt/Pd recovery using electrolisys

[plamenppp]

I read a lot about electrorefining gold and silver but I did not see anything about Pt/Pd/Rh (or I can not find it). Can you give me some links to read?

 

[butcher]

have not heard about using electrolisis to refine PGM's.
they do refine other metals and the PGM's are left as anode mud or slimes.

 

[4metals]

Butcher has it right.

PGM's are usually collected using silver or copper and concentrated by electrolytically refining the collector leaving the PGM's in the anode slimes.

 

[plamenppp]

Probably the refiners collect the mud and melt it but is it possible to do it with electrolysis?

 

[goldsilverpro]

I have heard of no one doing it. It would be difficult and maybe impossible.

 

[butcher]

GSP since it seems they do plate with PGM's,
http://www.jmcatalysts.com/pct/marketshome.asp?marketid=79
shouldn't there be some possibility? I understand the almost impossible statement.

 

[goldsilverpro]

I may have spoken too soon and impossible is perhaps too strong a word.

If you look in the plating literature, you'll find very few formulations for PGMs and they all use very specific PGM compounds and solution make ups. I would think if you went to all the trouble to first separate the PGMs and then make the compounds needed, you could have already refined the metals. I doubt if you'll have any luck, at all, separating the PGMs electrolytically. There's always been a tendency for people to think they can just hook up a couple of electrodes to any combination of metals in any sort of electrolyte and get good results. I've never seen this work yet. Prove me wrong.

 

[butcher]

thank's, I kinda thought it was (almost) imposible, as you said before devils in the details.

 

[goldsilverpro]

I revert to my original conclusion based on the original question. Electrorefining means the purification of a single metal by electrolytic means. If you have a solution containing Pt, Pd, and Rh, I would say that there are no one-shot electrolytic conditions that would allow you to refine (purify to a purity which is accepted internationally to be deemed as pure) any single one of these metals. I would say it is impossible.

 

[plamenppp]

I may have spoken too soon and impossible is perhaps too strong a word.
I doubt if you'll have any luck, at all, separating the PGMs electrolytically. There's always been a tendency for people to think they can just hook up a couple of electrodes to any combination of metals in any sort of electrolyte and get good results. I've never seen this work yet.

Therefore I ask first and after that I hook up 2 electrodes.

In my opinion, the electrolysis it the best way for separating gold/silver alloys and removing gold/silver plating. Therefore I am reading as much as I can when I can. Unfortunately, I still haven't found anything

 

[aflacglobal]

http://www.scribd.com/doc/17425864/Electroplating-and-Electrorefining1