Electrolytic Cell and Methods Combining Electrowinning and Electrochemical Reactions Employing a Membrane or Diaphragm.
Patent 1986 Dec; (4):8 pages
A method is described for the electrowinning of metals using an anodic reaction which differs from h2o oxidation, does not depend on anodic depolarization, and which can occur at compatible current densities for the 2 reactions. Operation of a combination cell for zn deposition at the cathode and anode current density of 6.5 and 15 a/dm2 repeatedly yielded favorable results and appears to be the most practical consideration. In cu electrowinning, the practical current density under normal mass transport conditions does not exceed about 3 a/dm2 and compatability was harder to achieve.
Patent No. 4,627,899; Dec. 9, 1986