Catalytic converter recovery and refine

[samuel-a]

if a cat is containing Rh, i belive the right way is to roast before the first leach..

 

[markqf1]

Roasting or, not roasting, is an ongoing debate.
I've found that it is possible to get 90+ percent of the pt and pd without roasting.
The rh is a different animal.
It usually requires a second, or even a third step, to extract the rh that hasn't been converted to oxides.
Bisulfate fusion works good for this.

Mark

 

[Palladium]

I've wondered for some time if you could use ozone and water to do a preleach instead of roasting. Ozone reacts with carbon to form carbon dioxide, even at room temperature.

 

[markqf1]

Ralph,
I can't tell you the answer to that question.
Maybe some of our more educated members will reply.
I can tell you that pre-roasting, compared to not roasting, has produced a substantial increase in rh recovery on the first run, for me.

Mark

 

[qst42know]

Ralph,
I can't tell you the answer to that question.
Maybe some of our more educated members will reply.
I can tell you that pre-roasting, compared to not roasting, has produced a substantial increase in rh recovery on the first run, for me.

Mark

Are you losing platinum and palladium in doing so?