Leaching of an oxide gold ore with chloride/hypochlorite solutions
An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl − concentration, and HCl concentration on gold leaching performance were investigated. Due to formation of CaOCl + complex in solution and hence less reactivity, calcium hypochlorite produces a sluggish gold leaching kinetics, taking twice ...
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A method for leaching or dissolving gold from ores or precious metal ...
In this study, the authors investigated the capability of a hot mixture of hydrochloric acid and ground manganese (IV) oxide to dissolve gold metal either under atmospheric or pressurized conditions. The best result was obtained under a pressure of 639 kPa at 90°C with a dissolution rate of 0.250 g·cm −2 h −1 and it was compared to that ...
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Can you dissolve gold with HCL and Bleach?
Yes, it is possible to dissolve Gold in HCl/bleach, but it is not suited for other than foils and powders. Easy man... i pressed enter and it posted immediately. Its edited. Yggdrasil said: Please do not edit posts unless you inform it has been edited, it may break the information chain after initial post.
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Gold Ore and Bleach Insight
The Internet showed instructions for HCL/Bleach extractions. It stated 2:1 ratio – Acid / Bleach. Use six times the volume of the ore. Let act for 4 hours stirring every 20 minutes. Then add Sodium Metabisulfate to drop the gold. Questions: Does this sound accurate? Do I need to remove the bleach before adding the SMB?
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Dissolution of Silver and Gold with Sodium Hypochlorite and ...
To study the dissolution of silver and gold, the following variables were considered: leaching time, type of reductive reagent, oxidation-reduction potential (ORP), pH, leaching reagent concentrations (hydrochloric acid (HCl) and sodium hypochlorite (NaClO)), and particle size.
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How to Refine Gold Ore with Bleach - goldsilverpgm.com
Put the ore into a mortar and grind it to the size of sand particles. Put the ore particles into the plastic bowl. Add 35% hydrochloric acid to the sodium hypochlorite bleach in the flask or beaker, and the ratio of acid to bleach is two to one. Ensure that the liquid mixture is at least six times the volume of the mineral particles.
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Cleaning Gold - The Methods You Can Use - gold-prospecting-wa.com
(1) Clean Your Gold With Detergent and a Toothbrush. In fact you can start the process of cleaning gold by putting a teaspoon full of detergent in your specimen container before you go prospecting. The action of friction and rubbing on your gold nuggets and the detergent will start the cleaning job for you while you are metal detecting.
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A Method for Leaching or Dissolving Gold from Ores or Precious Metal Scrap
hydrochloric acid with strong oxidizing compounds are known to generate in-situ nascent chlorine which is capable of dissolving gold efficiently. In this study, the authors investigated the capability of a hot mixture of hydrochloric acid and ground manganese (IV) oxide to dissolve gold metal either under atmospheric or pressurized conditions ...
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Solubility of Gold - Mineral Processing & Metallurgy
Spring has shown that gold is soluble in hydrochloric acid if heated with it to 150° in a closed tube, and is subsequently reduced by the liberated hydrogen and deposited as microscopic crystals on the side of the tube. The author has found that boiling concentrated hydrochloric acid dissolves gold and maintains it in solution.
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Gold Ore and Bleach Insight
I have an ore that has been assayed containing 4% gold. It is owned by a friend and he got the assay information from a Colorado company. I have reduced the ore to 150 micrometers in size and have removed most of its magnetics. The Internet showed instructions for HCL/Bleach extractions. It stated 2:1 ratio – Acid / Bleach.
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Leaching of an oxide gold ore with chloride/hypochlorite solutions
The mechanism of gold dissolution in chloride solutions involves the initial formation of Au (I)–chloride complex (AuCl) on the surface of metallic gold. AuCl undergoes further complexation with chloride ion to AuCl 2−. This complex then moves to solution and is oxidized with HClO to AuCl 4− ( Nicol, 1980, Nikoloski, 1998 ).
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The Igoli Mercury Free Gold Extraction Process Acid Bleach Leaching
The gold in the solids concentrate is dissolved in a solution containing a mixture of pool acid (33 - 34 % HCℓ) and bleach (15 - 16 % NaOCℓ). The solution mixture produces chlorine gas in the ratio 1:1 (HCℓ-NaOCℓ) of mixture to Cℓ2, which dissolves gold in the concentrate to form an faqueous media of gold and other elements.
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Solubility of Gold - Mineral Processing & Metallurgy
Gold is readily soluble in aqua regia, or in any other mixture producing nascent chlorine, among such mixtures being solutions of (1) nitrates, chlorides, and acid sulphates—e.g., bisulphate of soda, nitrate of soda, and common salt; (2) chlorides and some sulphates—e.g., ferric sulphate; (3) hydrochloric acid and nitrates, peroxides such ...
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Chlorate - an overview | ScienceDirect Topics
Other oxidizing agents that have been used to dissolve gold into hydrochloric acid include hydrogen peroxide and sodium chlorate. The most viable alternative to aqua regia, however, is the use of chlorine gas in combination with hydrochloric acid. In this process, chlorine gas is bubbled through a vigorously agitated suspension of atomized gold ...
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Putting gold into solution of HCL and bleach - YouTube
1:06 Putting gold into solution of HCL and bleach Brian Stuck 217 subscribers Subscribe 10K views 5 years ago Gold going into solution. HCl and bleach Show more Show more How To Refine...
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gold processing with muratic acid and chlorine bleach
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dissolving gold ore with bleach and hcl - Welcome to Tables & Thyme
Apr 20, 2021· Bleach is the chemical compound sodium hypochlorite. When combined with hydrochloric acid, the mixture produces chlorine that dissolves gold from gold ore. Allow four hours for the gold to dissolve, stirring every 20 minutes. The chlorine reacts with the gold inside the ore to form gold chloride.
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A method for leaching or dissolving gold from ores or precious metal ...
The hydrometallurgical leaching of native gold from gold-bearing ores or the dissolution of gold metal during the recycling of electronic and precious metal scrap is performed every day using hazardous chemicals such as sodium cyanide or aqua regia.
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Putting gold into solution of HCL and bleach - YouTube
Gold going into solution. HCl and bleach
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Author: Subject: Recovery of gold using HCl + H2O2 - Sciencemadness
HCl + H2O2 can dissolve gold as well. If you want to recover your gold, then you need H2O2 of higher concentration. You mix the H2O2 (e.g. 20%) one part with two parts of your 32% HCl and put the metal scrap in the mix. All metal stuff will dissolve, the gold also.
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dissolving gold ore with bleach and hcl - Welcome to Tables & Thyme
Feb 24, 2012· 1. place the scrap gold into nitric acid to dissolve all other metal "impurities" 2. filter the resulting blue solution and trap the gold 3. apply a mixture of 1:3 nitric/hydrochloric acid (aqua regia) to the gold to completely dissolve it 4. filter the resulting yellow liquid to remove any remaining impurities Read More
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hcl and bleach | Gold Refining & Metal Extraction Forum
I used the peroxide and hcl to remove the foils which worked really well but now that I added the bleach and hcl it don't want to dissolve the foils, I used a 6% bleach not Clorox how long does it take to dissolve its been about 2 days should I let it work longer or get Clorox and start all over...
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How to Refine Gold by the Acid Method | Shor International
Tap water and distilled water 1. Melt your gold and make shot This is optional, but recommended if you are using nitric acid instead of a substitute. Small open-up granules are best. If you are refining filigree or jewelry, shotting is not necessary. 2. Pour the shot into one or more Pyrex or plastic containers.
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(PDF) A method for leaching or dissolving gold from ores or precious ...
In this study, the authors investigated the capability of a hot mixture of hydrochloric acid and ground manganese (IV) oxide to dissolve gold metal either under atmospheric or pressurized conditions.
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Making Poorman Aqua Regia and Dissolving Metals in It.
Heat the solution for 1-2 hours and do this in a well-ventilated area due to HCl vapors. If you smell the vapors put on a gas mask and turn down the solution. When it Orange in color (Dissolved NO2 in water) your solution is done. Ask Question Step 3: Dissolving Different Metals in Aqua Regas. 6 More Images
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What metals aren't dissolved in/attacked by aqua regia?
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 science dictionary goes on to say (under the entry: Aqua regia) that metallic silver does not dissolve in aqua regia. Morever it does not mention any other examples of aqua regia-resistant metals. Further down, it mentions that silver's ...
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Refining Gold with Sulphuric Acid - Mineral Processing & Metallurgy
If the base alloy be placed in a lead bath, heated strongly, the gold and silver will dissolve in the lead, while the copper, on cooling down, will form an alloy with the lead, and float on the top. It may then be stiffened with ashes or such material as will entangle it, and scraped off.
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New compounds make dissolving gold simpler and safer
Two new polypseudohalogen compounds derived from cyanogen bromide have the unusual property that they can dissolve goldat room temperature. The discovery could lead to safer chemicals for leaching gold and other noble metals from ore, as well as offer a new way to recover and recycle metal from electronic waste.
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Can you refine gold with HCL and bleach? - ECHEMI
Actually, you can. Halogens will react with gold and oxidize it under acidic conditions. When you mix HCl and Bleach you will generate chlorine. Do this in the presence of finely ground gold containing ore, you will get gold chloride (I think HAuCl4) with can then be reduced to Au with sodium metabisulfate.
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Aqua regia - Wikipedia
move to sidebarhide (Top) 1Preparation and decomposition 2Applications 3Chemistry Toggle Chemistry subsection 3.1Dissolving gold 3.2Dissolving platinum 3.3Precipitating dissolved platinum 3.4Reaction with tin 3.5Reaction with other substances 4History 5See also 6Notes 7References 8External links Toggle the table of contents
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Can you dissolve gold with HCL and Bleach?
Most dissolving methods are not suited to dissolve plated Gold unless the plating is on non metallic substrate. Cyanide can be used, with proper safety precautions. Not sure if it can be profitable though, unless you have sufficient material to deplate. Edit for spelling A Akragon Well-known member Joined Jan 10, 2023 Messages 76 Location Niagara
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Gold foils are not dissolving in HCl +bleach
I have used the same bleach and the same hydrochloric acid multiple times to dissolve gold. This time it doesn't seem like all the gold wants to go into solution I've tried heat I've tried more HCL and I've tried more bleach before I try anything else I wanted to ask the forum what am I doing wrong? Ordered list Unordered list Indent Outdent 9 10
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