razvanflorin
Well-known member
Hi guys ! i would need an fast answer :mrgreen: How much gold can ar dissolve ? 3:1 ml ??
:G
Kind Regards - Florin.
:G
Kind Regards - Florin.
goldsilverpro said:heat to about 140F (never boil). and add a little nitric (about 5ml/ounce of metal)
kernels said:As above, the REAL question is, how much Nitric Acid do I need to dissolve a gram of gold in AR ? Because of the nature of the process, it doesn't really matter how much Hydrochloric Acid you use, as long as you use enough.
anachronism said:kernels said:As above, the REAL question is, how much Nitric Acid do I need to dissolve a gram of gold in AR ? Because of the nature of the process, it doesn't really matter how much Hydrochloric Acid you use, as long as you use enough.
Assuming you are talking about a re-refine where the gold is almost pure then the answer is much less than a cc. You can dissolve an awful lot of pure gold with 10cc. If however you are talking about "dirty" product in AR with copper etc to dissolve before the gold goes into solution then the answer is still the same but you need to take into account how much it took to dissolve the base metals. At which point it all starts to get a little cosmic when you're trying to crunch the numbers.
Every not pure dissolve solution is going to be different Kernels, and you have to take that into account. Suffice to say that 1cc per gramme is not a hard and fast rule.
goldsilverpro said:Richard
Actually, I find that it takes about the same ball-park amount of AR to dissolve gold as it does to dissolve copper or iron - about one gallon of AR to dissolve 2 pounds of metal in an open-top container.
Geo said:It can be done at ambient temperatures but it will be much slower. When you prepare the nitric acid leach, add equal amounts of tech grade nitric acid and distilled water. Use this same combination until all reaction stops. You should be able to cement any silver from this solution using solid copper metal. There should be a fair amount of silver recovered from ceramic CPU's. Also, use stannous chloride to test for the presence of palladium salts. With prices as they are, you may consider precipitating the silver using table salt or HCl as silver chloride if palladium is detected with a stannous test. If you are wanting to recover the palladium, it is much easier to separate the two salts at this stage.
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