An early electrolytic process used to refine gold. It used crude gold as the anode and pure gold as the cathode with a solution of gold chloride in hydrochloric acid as the electrolyte. By applying an electrical current across the electrodes, pure gold (p. 414) accumulates at the cathode. Silver present deposits as silver chloride. The process was developed in 1874 and is named after its German inventor Emil Wohlwill.