Electrolytic regeneration of the neodymium oxide reduction-spent salt

Electrolytic regeneration of the neodymium oxide reduction-spent salt

Production of Nd metal for Nd-Fe-B permanent magnet alloys results in CaO from the reduction of Nd sub 2 O sub 3 by Ca. Regeneration of Ca by reduction of CaO with graphite anodes is economically desirable; however, CaCO sub 3 forms from CO sub 2 released at the anode, combining with CaO in the elec...

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Veröffentlicht in:Journal of the Electrochemical Society 1990-11, Vol.137 (11), p.3333-3338
Hauptverfasser: KIPOUROS, G. J, SHARMA, R. A
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Chemical industry and chemicals
Exact sciences and technology
Industrial chemicals
Inorganic industry
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Beschreibung
Zusammenfassung:Production of Nd metal for Nd-Fe-B permanent magnet alloys results in CaO from the reduction of Nd sub 2 O sub 3 by Ca. Regeneration of Ca by reduction of CaO with graphite anodes is economically desirable; however, CaCO sub 3 forms from CO sub 2 released at the anode, combining with CaO in the electrolyte, and then reacting with Ca to form CaC sub 2 and CaO, thus degrading cathode efficiency.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2086218