I will try to help here. If you use the search function and search for denox it will give a better answer then i but here goes. To drop your gold you need to remove as much of the HNO3 nitric as you can this is done by Evaporation. Add HCL to your solution 1/3 the volume and heat DO NOT BOIL. As the solution Evaporates down to a syrup add more HCL. When there is no more Brown fumes coming off the HNO3 is gone and you should be able to drop the gold with SMB.frosty said:forget the first post, I am using hcI/nitric acid
4metals said:it is a stoichiometric relationship to nitric content but in lieu of rather complicated analysis to determine the free nitric content it is a learning curve to determine how much to add. Depending on your dissolving conditions I have been able to make some assumptions of how much nitric remains and add sulfamic accordingly.
Many here are going to do their work how they see fit, no matter my opinion.
butcher said:Frosty,
Follow Nickvc's advice, you can only profit from it. You are not profiting going in the direction you are taking now.
I will add put a thick bar of copper in that bucket also, I would also not have a lid that would not let gases escape, aqua regia could build pressure if gases cannot escape. Do not store where it could corrode other metal things like tools in your shed.
Dr. Poe is there a chemistry of these oxidants in ore that change by having the pH less acidic, (their oxidation power diminished) or (they chemically change state)?
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