Results: 70% of gold extraction for the refractory gold ore; 95% for the oxidised gold ore. Case 5 - A chlorine-based solution was used to dissolve gold from a …

Just trying to save the cost of the peroxide in case my result is negative. So I simply put a pinch of the concentrate in a small amount of hcl and it turned a banana like yellow before even adding any bleach. It did turn a deeper gold tinged yellow once the bleach was added though. (I'm still waiting on my stannous chloride, doing the solder ...

I am having a hard time trying to understand what you are asking and your goal, the air or peroxide is a mild oxidizer, it will oxidize the copper, allowing it to easily make a chloride salt (copper II chloride) soluble in solution from the free HCl in this solution, hydrochloric acid without this oxidizer would not attack the copper much at all.

With even stronger hydrogen peroxide we can end up changing all of the fine gold foils to dissolved gold plating back onto the copper yet undissolved, with these stronger oxidizers in solution less heat is needed to oxidize the chlorides to chlorine, with HCl and 30% H2O2 hydrogen peroxide we can dissolve gold in just a warm solution, in …

Your response is really appreciated, I think you alright I have to decrease to 1 gram cyanide per liter. Regard my experiment, will use peroxide because am not concern about the cost since I just want to test the gold grade in the ore in minimum time, so I think I can finish dissolution the gold within 48 hours with peroxide and without use agitated …

Typically when using AP (hcl/peroxide or acid peroxide) it is not desired to dissolve the gold. This is just a side effect of the dissolving power of the mix. The goal when using AP is usually to dissolve the base metals only. I have used the AP mix to dissolve small amonts of gold for a few experiments. :wink: Steve

Gold Ore Refining Hcl And Peroxide T10:05:43+00:00 Hcl/ peroxide question Gold Refining Forum With even stronger hydrogen peroxide we can end up changing all of the fine gold foils to dissolved gold plating back onto the copper yet undissolved, with these stronger oxidizers in solution less heat is needed to oxidize the chlorides to ...

Abstract. In this study, the effects of thiourea (CH 4 N 2 S) on the efficiency of gold dissolution were investigated for the extraction of gold from an oxide gold ore of the eastern Anatolia region, Turkey. In the thiourea leaching experiments; several parameters such as particle size (–75, –53, and –38 μm), leaching time (30, 60, 120, 180, and 240 …

Gold Refining Processes. Chemical Processes & Chemical Discussion . HCL/peroxide hcl/Clorox - paper filter. Thread starter crudpuppy; Start date Sep 5, 2010; Help Support Gold Refining Forum: ... going to reclean with hcl/peroxide but doesnt really get ride of paper content in it. If hcl/clorox will only eat metals then I could prolly due that ...

O2 + CH3CHO → CH3CO3H. In the presence of a strong acid catalyst, such as sulfuric acid, acetic acid and hydrogen peroxide produce peracetic acid: [3] H2O2 + CH3CO2H ⇌ CH3CO3H + H2O. However, in concentrations (3-6%) of vinegar and hydrogen peroxide marketed for use, mixing without a strong acid catalyst …

1. Introduction. Gold has attracted people since the beginning of the civilization. The earliest mining and metallurgical operations of which traces remain were those carried on in Egypt in dealing with the ores of gold [1].The mixture of concentrated HNO 3 with HCl, aqua regia [2], is a well-known medium of dissolving gold and other …

But if heated strongly even the excess oxygen from air, can oxidize the chloride to form chlorine in solution which can dissolve gold, with air probably not that much gold would be dissolved that we may notice, but as we had stronger oxidizers like …

Dec 25, 2007. #7. Hild2000: Hi; One or more of those other chemicals in the 9% peroxide are classed as stabilizers, to keep it from decomposing. You will find small amounts in all bottled peroxide to keep the bottle from bursting. On long term storage of my 30% peroxide, I have drilled a small hole in the top of the bottle caps.

*Cupellation is a refining process in metallurgy, where ores or alloyed metals are treated under high temperatures and controlled operations to separate noble metals, like gold and silver, from base metals like lead, copper, zinc, arsenic, antimony or bismuth, present in the ore. ... Muriatic Acid 34% HCL ~ Baume. 3. Hydrogen Peroxide - 3% but ...

Gold Refining & Metal Refining Classifieds. Vendors - Refiners, Buyers, Assayers ... . Platinum, palladium and gold leaching from magnetite ore, with concentrated chloride solutions and ozone. Thread starter Nuwaysolutions; Start date Nov 30, 2017; Help Support Gold Refining Forum: ... Sounds a lot like hydrochloric …

Thanks for the info Steve. Interesting to note that SMB neutralizes the peroxide. I dissolved a little copper with Hcl and found gold dust left. I had been using this HCL/Peroxide solution for about 3 weeks to do cpus and fingers. I was filtering the mix and regenerating it with extra peroxide and a fish tank bubbler.

When that is said for bonding wires and other solid Gold, AR is recommended. HCl/Bleach and HCl/Peroxide lack the potency and speed that AR have. …

I took a friends advice and tried 2 parts Muratic acid and 1 part Hydrogen Peroxide to extract gold from pc boards and cell phones. He has since went missing and I dont know what the remainder of this process is. I'm a single father so a cheap process is what I need. Currently I have cleaned and soaked alot of pieces.

The lower concentration of peroxide will have a much harder time dissolving any gold so that shouldn't be a problem until you pass the 2:1 ratio with peroxide additions (Acid eroxide). If you keep the temperature at room temperature (25 C )you shouldn't have any gold absorbed. Any absorbed gold will readily percipitate using SMB.

shown that hydrogen peroxide can be used as a source of oxygen in the leaching of gold ores. To avoid side reactions, the following conditions must be applied: Hydrogen …

I placed 36 Pentium Pro chips in the acid, (mixed 2 parts HCL & 1 part Peroxide) For 36 hours. The CPUs were whole and unaltered in any way. I now have 36 ceramic chips (with most, but not all of the pins missing, most of the gold plates are exposed, and most of the gold flake from the face plates has flaked off), a set of 3 coffee …

84. Location. Titusville, Pa. Apr 25, 2007. #1. I mixed a batch of Peroxide-HCL acid according to instructions given by Lazersteve elsewhere on this forum. I placed 36 PP chips in the jar. After 2 days the acid is a medium green color and there is no indication of the pins and plates detaching from the ceramic.

I have 2 questions I need some advice on. First of all thanks to those who gave good advice on my previous ?'s, was very helpful. 1st question is after recovering the foils I have A little bit of copper particles than made in with the gold foils from e-scrap along with the green plastic, which...

Reactions. Two separate reactions take place in the gold-dissolving process. The nitric acid acts as an oxidizing agent, with three molecules of the acid each donating a proton to gold to give it a positive charge of +3. Concurrently, chloride ions resulting from the separation of HCl into its components combine with the newly oxidized gold to ...

Ohio, USA. Dec 13, 2015. #4. powermetalx said: It seems there is some disagreement over the use of HCl H2O2 vs HCl alone. There are many ways to skin the . HCl peroxide is a great "set and forget" method, as it doesn't require much attention, but it's slow. Heating HCl requires a bit more attention, but it's faster.

Laziness can sometimes be a blessing too.. I wanted to clean this crucible with the dilute sulfuric solution as suggested by @BlackLabel, but instead of hopping to the market to fetch some sulfuric, I tried this little cleaning experiment with a 50Ml 5M citric acid (aq) solution.It worked great. I dipped theb crucible in a 100 ml beaker and poured the …

Place the crucible on a fireproof surface. 3. Aim an acetylene torch at the gold. Aim the flame at the gold until the gold is completely melted. 4. Pick up the crucible using crucible tongs. 5. Separate the gold into small pieces and allow them to harden.