Your Scrap Gold Recovery Kit Includes…
- 2.5kg bottle of Sodium Metabisulfite (NC-12597).
- 2.5kg bottle of Urea (NC-9275).
Sodium metabisulfite is commonly used to precipitate dissolved gold out of aqua regia and gold chloride solutions. When it is dissolved into water, sulfur dioxide gas is created which is excellent at precipitating gold from the solution. Sodium metabisulfite is a popular choice in this process because it is more selective in precipitating gold by itself. Use about 1-1/2 tablespoons of sodium metabisulfite (SMB) for every ounce of dissolved scrap metal in solution. Good ventilation is critical as adding SMB to aqua regia produces corrosive vapors.
In the process of gold extraction from scrap computer electronics parts, Sodium Metabisulfite is usually used along with Urea.
Urea, also called carbamide, is soluble in water and alcohol and is non-combustible. In gold recovery processes, it is used as a neutralizer of excess nitric acid in aqua regia solutions.
To make aqua regia solution you will need Hydrochloric Acid and Nitric Acid. These are sold separately from this kit.
This kit is a convenient way to obtain some of the chemicals used in scrap gold recovery. Please follow your own instructions for performing gold and other precious metals precipitation from aqua regia solution.
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