An electrolytic process is the use of electrolysis industrially to refine metals or compounds at a high purity and low cost.
Some examples are the Hall-Héroult process[1] used for aluminium, or the production of hydrogen from water.
Electrolysis is usually done in bulk using hundreds of sheets of metal connected to an electric power source.
The copper from the anodes is electroplated on to the cathodes, while any impurities settle to the bottom of the tank.
This forms cathodes of 99.999% pure copper.