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New solution found for Gold extraction

  1. Feb 6, 2016 #1
    No mention of this here so far that I see so I would like to see what the experts know about this. A Univeristy of Saskatchewan professor claims he has invented a solution, "acetic acid combined with very small amounts of an oxidant and another acid", that can rapidly remove plated gold from electronic circuit boards and leave the other metals untouched. It is environmentally benign compared to cyanide or mecury.
    My question is, is anyone willing to guess what the other two ingredients might be? And how does it work? It dissolves the thin plating in ten seconds! Quite an accomplishment.
    Here is the link. http://words.usask.ca/news/2016/01/29/gold-diggers/
     
  2. jcsd
  3. Feb 6, 2016 #2

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    Chlorinated hydrocarbons. Wedding rings, other (Au) jewelry, catalyze acid formation from chloroform/methylene chloride, and, presumably other similar chemicals.
     
  4. Feb 6, 2016 #3
    That is interesting to know. Somehow I don't think he was saying the acid is formed due to a reaction. He said an acid (and an oxidizer) is part of the original
    solution. Methylene chloride or chlorform is not evironmentally freindly.
     
  5. Feb 6, 2016 #4

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