Buy Gold Recovery Chemicals For Refining, Testing, Extraction And Precipitation Online At LabAlley.com
You can buy chemicals used to extract gold from electronics and computer scrap online here. Learn how to extract gold from electronics, here.
The Wohlwill process is an industrial-scale chemical procedure used to refine gold to the highest degree of purity. Learn how to precipitate gold from aqua regia, here. Learn how to use nitric acid safely, here.
What Chemical Acids Do You Need For Gold Recovery?
The aqua regia is formed by mixing 425ml of concentrated hydrochloric acid 37% and 150 ml of concentrated nitric acid 70%. The resulting mixture is stirred and heated to about 40C. The gold completely dissolves in the aqua regia to form a clear, golden-colored solution. The solution is cooled to room temperature.
The aqua regia refining process is used to refine gold alloys using a combination of acids and chemical products. The aqua regia solution consists of a mixture of hydrochloric acid HCL and nitric acid HNO3. Learn how to refine gold with nitric acid, here.
Learn how to refine gold with nitric acid here. Learn how to clean gold with nitric acid here. Learn how and why nitric acid is used for gold recovery, here. Nitric acid is a colorless acid with a strong acidic character and molecular formula HNO3.
Urea neutralizes excess nitric acid in aqua regia solutions. Urea has several uses in precious metal refining.
After gold is washed it is subjected to a second boiling with sulphuric acid, in the proportion of one of gold to eight of acid. It is boiled for about three hours.
Gold Recovery Chemicals List
- Buy Nitric Acid
- Buy Hydrochloric Acid
- Sodium Cyanide
- Muriatic Acid (Hydrochloric Acid)
- Acetic Acid (Vinegar)
- Sulfuric Acid
- Hydrofluoric Acid
- Sodium Bicarbonate
- Recovery of Gold by Precipitation with Zinc
- Zinc Strips
- Buy Mercury Metal (Liquid Mercury) And Triple Distilled Mercury For Gold Amalgamation
- Buy Mercuric Chloride To Remove Gold From Lead
- Aqua Regia (Nitric Acid And Hydrochloric Acid)
- Purified Sodium Metabisulfite (SMB/ Sodium Pyrosulfite) In Powder Form
- Lab Grade Sodium Metabisulfite
- Sodium Metabisulfite (Analytical Reagent) In Granular Form
- Potassium Nitrate (Saltpeter)
- Phosphoric Acid
- Silver Nitrate
- Sodium Hypochlorite
- Urea (Neutralizes Excess Nitric Acid In Aqua Regia Solutions)
- Boric Acid
- Ammonium Chloride
- Sodium Borate (Borax)
Gold is stable to even strong acids, but a special combination of nitric acid and hydrochloric acid can dissolve it. This combination is known as "aqua regia", which is latin for "royal water," because of it's special ability to dissolve gold.
Gold Extraction, Gold Recovery And Gold Refining Resources
- How Acetic Acid Is Used To Extract Gold From Electronics
- How To Clean Gold With Nitric Acid
- Buy 500ml Of 67% Nitric Acid Industrial Grade for Gold Refining And Metal Recovery Of Platinum And Silver
- Recovery Of Nitric Acid And Gold From Gold-Bearing Aqua Regia By Tributyl-Phosphate
- How To Refine Gold
- Recovery Of Gold From Computer Circuit Board Scrap Using Aqua Regia
- How Cyanide Is Used In Gold Mining
- Dissolve Gold With Aqua regia
- How To Make Aqua Regia
- Buy Sodium Metabisulfite To Precipitate Dissolved Gold From Gold Chloride Solutions And Aqua Regia
- How To Reform Solid Gold After Dissolving It In Aqua Regia
- Use Boric Acid To Melt Gold
- Use Boric Acid For Gold Refining
- Gold Refining Purification Process
- How To Remove Gold From Circuit Boards
Aqua regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange (sometimes red) fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals. Read more here.
To refine gold with nitric acid, you will first need to blend the nitric acid with hydrochloric acid to produce aqua regia.
Concentrated sulfuric will dissolve silver and gold, gold will precipitate when solution is diluted, salt could be added to form silver chloride and HCl in the dilute solution to precipitate silver.
Pictured above are drops of aqua regia at different concentrations react with gold plated contacts on a printed circuit board. From left: 10 K, 14K, 18K, 22K solutions of test kit acid show the contacts are between 10k and 14K.
For recovery of gold from computer circuit board scrap, use aqua regia. Computer circuit board scrap can be treated with one part concentrated nitric acid and two parts water at 70 degrees C for 1 h. This step dissolved the base metals, thereby liberating the chips from the boards.
Nitric Acid For Gold Testing
Testing for gold with acid focuses on the fact that gold is a noble metal which is resistant to change by corrosion, oxidation, or acid. The acid test for gold is to rub the gold-colored item on black stone, which will leave an easily visible mark. The mark is tested by applying nitric acid, which dissolves the mark of any item that is not gold. If the mark remains, it is tested by applying aqua regia (nitric acid and hydrochloric acid). If the mark is removed, then this test dissolves the gold, proving the item to be genuine gold. More accurate testing of the item for its fineness or purity can be done through the use of differing strengths of aqua regia and comparative testing of gold items of known fineness.
Leaching dissolves the gold out of the ore using a chemical solvent. The most common solvent is cyanide, which must be combined with oxygen in a process known as carbon-in-pulp. As the cyanide and oxygen react chemically, gold in the pulp dissolves. Read more here.
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. Read more here.
Muriatic acid, better known today as hydrochloric acid, is a simple, corrosive liquid with well-studied chemical properties. When gold is subjected to treatment with muriatic acid alone, nothing happens. But when muriatic acid is combined with nitric acid to treat gold, the gold dissolves. Read more here.
If the solution contains platinum or rhodium impurities, these can be first precipitated with ammonium chloride and patience. Next you add sodium metabisulfite to precipitate the gold. This precipitate is gold powder. Filter it off, rinse repeatedly with water to remove trace acid, then dry it. Read more here.
Aqua regia is a corrosive reagent used to clean glassware and in gold refining processes. It is made by mixing nitric acid and hydrochloric acid in a 1:3 ratio. The name comes from the Latin 'royal water', as it can dissolve gold and platinum - metals associated with royalty. Read more here.
Learn about gold recovery and e-waste recycling. Sodium metabisulfite (sodium pyrosulfite) is a white chemical in powder form that is used for gold precipitation. Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. It is a dangerous acid used in gold recovery. Borax (sodium borate, sodium tetraborate, disodium tetraborate) is also used in flux. It helps in gold smelting. Sulfuric acid is used for gold recovery from ic chips in E-waste recycling. Nitric acid (aqua fortis and spirit of niter), commercial grade concentration 68% in water, removes base metals and is used in aqua regia. Hydrochloric acid 32% is used in e-waste recycling and is the main part of aqua regia. Aqua Regia is a gold recovery chemical solution. Sodium Bicarbonate (Soda) is a cleaning agent. If there is any dust or filter paper ash in you gold dust and have trouble to melt gold then you can add some soda. Soda helps gold in melting. Potassium Nitrate is used in gold recovery. Read more here.