what-chemicals-are-used-in-gold-refineries
                     What Chemicals Are 
Used in Gold 
RGolde refifineriens faece crhailleengess in? processing raw gold. Complex impurity 
removal requires precision and expertise. Industry experts understand the 
need for precise chemicals. Refineries must navigate strict environmental 
regulations.
Primary Acids and Solutions
Hydrochloric Acid Nitric Acid Aqua Regia Sulfuric Acid
Dissolves base metals while Removes silver and Completely dissolves pure Helps eliminate remaining 
preserving precious metal platinum group metals gold due to its unique traces of base metals.
content. efficiently. properties.
Precipitating and Reducing Agents
Sodium Metabisulfite Ferrous Sulfate
Creates pure gold precipitation from chloride solutions. Serves as an alternative precipitant in specialized 
processes.
Sodium Nitrate Oxalic Acid
Maintains oxidizing conditions during metal reduction Produces high-purity gold precipitate for industrial uses.
steps.
Neutralizing Agents
Urea Sodium Sodium 
Hydroxide Carbonate
Breaks down excess 
nitric acid without Neutralizes strong Provides pH balance in 
affecting dissolved acids in spent solution final waste processing.
metals. treatment.
Fluxes and Melting Agents
Sodium Tetraborate
2 Helps separate unwanted oxides from 
molten precious metals.
Borax
1
Creates protective barriers to prevent 
oxidation during melting.
Potassium Nitrate
Acts as an oxidizing agent in flux 
3 mixtures.
Gold Refining Techniques
Aqua Regia Dissolution
1
Breaks down gold into soluble chloride compounds.
Miller Chlorination
2
Removes base metals through chlorine gas treatment.
Wohlwill Electrolysis
3
Achieves highest purity levels for industrial applications.
Other Important Chemicals
Potassium Cyanide Zinc Powder Chlorine Gas
Selectively dissolves gold in large- Precipitates gold from solution with Removes base metals through 
scale operations. high recovery rates. controlled oxidation reactions.
Safety Protocols
Personal Protective Equipment
Must meet international safety standards.
Emergency Shower Stations
Require monthly testing and maintenance.
Ventilation Systems
Operate continuously during chemical processing.
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