Search results
Results from the WOW.Com Content Network
EU. Apr 7, 2022. #3. SMB or any sulfite is a winner for me. Practically non-toxic, cheap and very effective. Also easy to tell when you added enough. Ferrous sulfate has an disadvantage - it contain iron. So when dropping gold, you inevitably introduce a lot of iron to the solution. If we take it more analytically, iron (II) oxidation is one ...
snoman701 said: Sodium chlorate is just the source for chlorine gas, which is what causes the ammonium hexachloropalladate to precipitate. You can also sparge chlorine via chlorine gas generator using pool shock granules and HCl in an equalizing funnel for a more controlled reaction.
Jun 25, 2014. #3. best thing to do is: drop your gold. leave it in its powder form. incinerate to remove acids (heat until red, do not melt powder) place in small amount of 50/50 nitric acid & heat. you will see the nitric change colour from the iron (Fe) pour off nitric, redo the AR & drop process.
Hello guys, Please, advise the best method to precipitate a maximum percent of PGM from Aqua Regia solution. Now I work with rich sulfide ore concentrate with PGM at about 800 gr/ton (mainly Pt, Ag, Au). I have to use Aqua Regia (AR) 30% as a dissolver because of its high oxidizing potential...
The most commonly reason that we get gold chloride with our silver chloride precipitate is when dissolving gold with small amounts of silver in the alloy in AR. The silver is then turned into silver chloride and we can both have small particles of metallic gold encased in silver chloride as well as gold chloride mechanically trapped in the ...
Location. Pacific NW. Mar 7, 2019. #2. Wizzlebiz, Bleach is a basic solution of chlorine gas in water, NaOH sodium hydroxide (a base) is used to keep the chlorine in the solution. When mixing bleach sodium hypochlorite NaClO with hydrochloric acid HCl we have a couple of reactions, A portion of the acidic HCl and the basic NaOH neutralize each ...
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 ...
Aqua Regia is about the only method, for the small refiner, to purify gold to 999.9 Fine - no matter what anyone says. Not only does this method work on most karat golds, it is also the final re-fining step that is used to purify the gold collected from all types of scrap. Once you learn the steps for karat gold, which is the most difficult ...
I was first cleaning e-west specially only gold leaf, other trash removed by nitric acid and sulfuric acid bath, prepare aqua regia on 1:3 ratio of HNO3+HCl then put my e west in glass container. within 1 to 2 hours all gold are dissolved in AR. then filter twice with filter paper,AR solution are become dark golden yellow ( 900ml). all chemical ...
Pacific NW. Aug 27, 2017. #2. As soon as you mix aqua regia it begins a reaction (even without metals involved) gases start forming and begin to gas off from solution, (or react with metals) before gassing off. Heat will drive the reactions faster.