|electrorefining of gold||0.33||1||1060||14|
The electric current ionises the electrolyte and transfers dissolved gold from the anode to the cathode, thereby increasing the purity of the gold at the cathode. This refining process is known as the Wohlwill process. Silver and other precious metals can be refined using the same electro-refining technique.How does electrolytic gold recovery work?
Electrolytic gold recovery begins with a bath of hydrochloric acid, which forms the electrolyte. The cathode is usually a thin sheet of 24K gold, but it needs to be better than 99.5% pure. The gold alloy (source material) comprises the anode.What is the method of electrolysis of gold?
The gold alloy (source material) comprises the anode. This method is called the Wohlwill process. While a high electric current passes through the electrolyte, between the anode and cathode; the acid bath dissolves the anode material and, through ion transfer, a high purity of gold is transferred onto the cathode.What is electrorefining and how does it work?
Using a molten salt or non-aqueous electrolyte, electrorefining methods are used and are indeed the focus of further research. This is due to the possibilities they offer to increase current densities and refining through lower oxidation states that are not stable in water (e.g. copper refining via Cu + would nearly halve the energy requirement).