Ingredients Used Gold or finely powdered ore. Hydrochloric acid. Nitric acid. Formic acid. Sodium sulfite or sodium bisulfite. Tap water and distilled water. Un-iodized …

after digesting black sand concentrate in heated Aqua Regia boiling down 3x of HCL we have the syrup photographed. Stannous check shows positive for Au, and Pt, we're pretty sure there is a good amount of Rh in the solution as well. What is the precip order recommended?

GOLD WORKING ACID IOWAGOLD. HOW TO USE AQUA REGIA TO PURIFY GOLD by Tom Ashworth 100 mesh crushed black sand ore etc Hydrochloric acid Nitric acid Continue to add the sodium sulfite until the gold stops falling You should see black specks that look like pepper This is gold sulfide 19 Filter off the gold sulfide through a plastic strainer or …

MY AQUA REGIA. Thread starter rkbassin; Start date Feb 21, 2011; Help Support Gold Refining Forum: Prev. 1; 2; First Prev 2 of 2 Go to page. Go. fiquett11 Member. Joined Aug 19, 2023 Messages 14 Location ... Latest: Heavy-Black-Sand; Today at 1:43 PM; General Gold Refining Discussion. H. Long time lurker, ready to become …

Gold extraction processes from both primary and secondary sources have changed little over the past centuries with cyanide remaining the preferred leach reagent used in 90% of gold mines, while aqua regia, which has been used for more than 1000 years, remains an unmatched gold leaching reagent for secondary sources.

Depending on what other metals are in solution with your gold, the sodium hydroxide could cause other metals to precipitate, contaminating your gold. You also need your solution to be acidic to react with the SMB to create SO 2. Bringing your solution too close to neutral could cause problems reducing your gold. Dave.

The process of refining gold requires reactions among chemical compounds, and the key to the refining process is a highly corrosive liquid called aqua regia. This combination of acids is integral to the extraction …

Used Aqua Regia, result is green sludge. Thread starter p30504; Start date Apr 9, 2011; Help Support Gold Refining Forum: P. ... I had about 1 1/2 pds of certain gold fill, and another 2-2 1/2 lbs of probable gold plate, some gold fill and other mystery metals. ... Heavy-Black-Sand; Today at 3:40 AM; Vendors - Refiners, Buyers, Assayers ...

After digestion, all that remained was bits of rock and gold. What started out as almost ten gallons of material was reduced to slightly less than a quart, which yielded something greater than six ounces, at least as I recall. This was MANY years ago. Bear in mind, I was buying HCl for $57 for a 55 gallon drum. Harold.

After washing the CPU's and purifying them of base metals, I decanted the fluid and proceeded to make a A/R solution to which i added my CPU's (fine i believe). Heres the problem I added the PCB and the gold pins directly into the A/R and completely forgot the wash and left overnight (what a plonker). I believe Base metals have been …

Then, the gold is dissolved by itself, using a small amount of aqua regia. Initially, the copper is dissolved with nitric acid/water or with the AP process, Muriatic acid/hydrogen peroxide (or, better, an air bubbler) 3 - Dissolve everything with aqua regia More difficult to drop the gold with SMB because of the large amounts of base metals ...

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Aqua regia (Latin: Royal Water) is one of the strongest acids known in Chemistry, and is capable of dissolving gold and platinum. My copy of the Oxford …

aqua regia gold black sand ; Spiritual Intelligence Aqua Regia. Aqua Regia is a spiritual intelligence company that utilizes prophecy, word of knowledge, dream interpretation, strategic intercession, and discernment to unlock practical solutions in the professional and personal realms of those we Nov 10, 2012 For each gram of gold use 38ml HCl ...

Aqua regia is a refining method, not a recovery method, ... I'll try to refine gold with ore or black sand real gold and I find material for free. I know areas. Reply. B. butcher Moderator. Staff member. Supporting Member. Moderator. Joined Jan 6, 2008 Messages 10,086 Location Pacific NW.

61. Nov 8, 2012. #1. I made AR to refining gold from 500mg black sand and I put aluminum foil in it (after filtering) 15 grams but it can't disolving complete. I can't …

May 29, 2015. If you've spent any time studying the history precious metals, you've heard of a chemical called aqua regia. That name means "royal water" in Latin, but that's misleading. Aqua regia isn't royal, and it isn't …

It is an alternative to using Sulfuric acid and makes a good material that can dissolve gold, copper, brass, iron, silver and antimony metal very well. A good hot plate (distillation, etc) …

But to my experience the chlorine evaporates very fast and in addition one should always use the minimal amount of chlorine/Clorox that is needed to dissolve the gold. Do not use too much or it will take longer to evaporate. Also a persistent myth is the premixing of HCl+Cl or Aqua regia. That is a bad thing to do.

Place your beaker on a hot plate and turn it on to dry the gold "mud." Do not preheat the hot plate or thermal shock may cause the beaker to break. Once dry, the gold powder …

There is too much garbage in there to go straight to aqua regia. Who knows what you are dissolving, how much, or if it is even soluble. Eliminate as much junk as possible then decide how to go about getting the gold. There are other methods besides aqua regia that may work better given your feed material.

Dark side of the Moon. May 4, 2008. #3. Lou said: That reaction (oxidation) is very finicky and requires careful temperature control. Also, transition metals tend to decompose hydrazine hence the use of EDTA or gelatine in the urea+OCl- method. There is a thread on sciencemadness about the synthesis of hydrazine from urea and I highly …

24. Apr 24, 2017. #9. solar_plasma said: My guess: It was green by a mix of copper (II)chloride, which forms blue complexes if dilluted, and yellow (dilluted) or orange (more concentrated) HAuCl4. You probably precipitated a tiny amount of gold from a comparable dirty solution, which might cause gold clusters so small, that it might take days ...

Location. Sweden. Mar 17, 2013. #4. Processing fiber processors in aqua regia is a bad idea because the way they are constructed. The gold and base metals will dissolve but not all as some are protected by the pcb (printed circuit board). Some gold could start to cement onto the remaining base metals inside the pcb.

Jun 11, 2008. #1. We mixed silver (50gr.) with platinum (29gr.) Placed it in Nitric Acid got rid of the silver, and then placed the remaining dust in to the Aqua Regia.Platinum disolved in the solution boiled twice and added Hyrochloric acid to get rid of the nitric and then put in the ammonium chloride to drop the platinum sponge out.

This will dissolve the silver chloride. 2, The clean gold solids should be weighed, and inquarted in silver. 3, The silver / gold alloy should be parted in 50% nitric acid (half nitric half distilled water.) 4, The solids should be collected and rinsed and dissolved in aqua regia. 5, Filter the aqua regia and mix it with the original aqua regia ...

Then after separating your gold foil, disolve them in a small amount of AR. Randy . Reply. B. butcher Moderator. Staff member. Supporting Member. Moderator. Joined Jan 6, 2008 Messages 10,086 Location Pacific NW. Dec 23, 2008 #12 Or easier than Aqua regia, try hydrochloric acid HCL (muratic) and Clorox bleach to disolve gold, this way no …

This is the process i used. I place a piece of 18k gold filled in aqua regia. That worked well. IT totaly disolved the entire contents. There was no sludge, grains or metal at all in the solution. I then added urea to neutralize the aqua regia and strained the blue solution through a filter.

First, the soil reacted with aqua regia. Then I did the filtering. remained completely liquid. I used sulfamic acid to make nitric acid neutral. I used ferrous sulfate for metal separation. (iron sulphate is blue in color. It has crystals at the bottom.) but my mixture did not turn black. it turned yellow.

In short I have gold in my solution that I cant precipitate with sodium metabisulfate. I originally extracted some gold ore with direct aqua regia, then added sulfuric acid and vacuum filtered twice. Test with stannous chloride confirmed there was gold. From the resulting solution I started a 5v electrolysis in which gold started to plate …