Twenty-Five Years ' Progress in Electrowinning and Electrorefining of Metals

chemical Society, several reviews of electrowinning and electrorefining processes were presented in the J ourna l. H. N. Gilbert (1) discussed the history of electrolytic sodium production, J. D. Edwards (2) ex-amined 50 years of development in the Aluminum Industry, W. S. Loose (3) reviewed the 36 years of industrial magnesium production, and A. C. Loonam (4) wrote about the progress that occurred in the electrolytic production of other metals over the 50 year period. By 1952, the electrolytic production of metals was a mature industry. Mantell (5) gives a good description of the commercial electrolytic plants operating at that time. Since then only a few metals such as antimony, zirconium, and t itanium have been added, even to the list of those obtained at pilot scale