Hi, I'm new to the forum. I've been all over the internet searching for a process similar to mine, with no luck.
I have the following solution:
2 gallons [4:4:9 mix ratio] 37% HCl (SEMI grade): 68% HNO3 (SEMI grade): DI water
and in that solution I have dissolved:
approximately 45 grams 99.9% gold
~100 PPM 99.999% copper
Trace PPM Ti 99.999%
The solution is a pale aqua blue-green color.
I have then added 10 g SMB incrementally, and the solution became dark, then became a very brilliant orange red color with no precipitant. I understand that at this point no matter how much SMB I add, the solution will not produce a precipitant. In addition, I have the thought that the excess of nitric acid in solution is causing re dissolution of my Au into auric chloride.
I am planning to use 45% KOH to react with HNO3 in order to isolate the auric chloride. Am I missing something obvious or does this seem like a good plan?
I have the following solution:
2 gallons [4:4:9 mix ratio] 37% HCl (SEMI grade): 68% HNO3 (SEMI grade): DI water
and in that solution I have dissolved:
approximately 45 grams 99.9% gold
~100 PPM 99.999% copper
Trace PPM Ti 99.999%
The solution is a pale aqua blue-green color.
I have then added 10 g SMB incrementally, and the solution became dark, then became a very brilliant orange red color with no precipitant. I understand that at this point no matter how much SMB I add, the solution will not produce a precipitant. In addition, I have the thought that the excess of nitric acid in solution is causing re dissolution of my Au into auric chloride.
I am planning to use 45% KOH to react with HNO3 in order to isolate the auric chloride. Am I missing something obvious or does this seem like a good plan?