NobleMetalWorks
Well-known member
I was reading patents and came across this, nothing really new, the patent is really for the design of the cell, but the patent does outline several different ways of recovering precious metals using different acids under different conditions. Interesting in understand the different electrolytic processes.
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http://www.freepatentsonline.com/4606797.html
----- Edited and added link -----
http://www.freepatentsonline.com/4606797.html