The Wohlwill process, invented by Emil Wohlwill in 1874, is an industrial-scale chemical parting gold procedure used to refine gold to the highest degree of purity (99.999%). This electrochemical method involves using a cast gold ingot as an anode and small sheets of pure gold or stainless steel as cathodes. A current is applied, causing gold and other metals to dissolve at the anode, with pure gold being plated onto the cathode through ion transfer. The resulting gold is 99.999% pure, surpassing the purity achieved by the Miller process. The Wohlwill process is crucial for industrial gold production requiring the highest purity, particularly in applications like electronics. However, for lower purity gold, the Miller process is often favored due to its simplicity, quicker turnaround times, and the absence of a large gold inventory in the form of chloroauric acid.