Electrowinning of neodymium from a molten oxide-fluoride electrolyte.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9504, 1994 Jan; :1-8
Neodymium metal of 99.8 percent purity was prepared by electrolysis of Nd2O3 salts dissolved in a molten fluoride electrolyte. The metal was electrowon in a molten state at current efficiencies of 50 to 60 percent. Oxygen and carbon were the major impurities detected in the product. During operation of the small scale laboratory cell, a number of technical problems including anode effect, low oxide solubility in the electrolyte, high neodymium metal solubility, reactivity of the metal with the cell materials, and back reaction of the metal with the anode gases were encountered. Approaches to improve cell operation and prospects for commercial adoption of the electrolytic production of neodymium metal are discussed.
Electrolytes; Fluorides; Electrolytic-cells; Electrolysis; Commercial-development; Rare-earth-metals; Electrowinning; Electrometallurgy; Neodymium
Report of Investigations
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9504