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Electrolytic production of neodymium without perfluorinated carbon compounds on the offgases

United States Patent

5,810,993
September 22, 1998
View the Complete Patent at the US Patent & Trademark Office
A method of producing neodymium in an electrolytic cell without formation of perfluorinated carbon gases (PFCs), the method comprising the steps of providing an electrolyte in the electrolytic cell and providing an anode in an anode region of the electrolyte and providing a cathode in a cathode region of the electrolytic cell. Dissolving an oxygen-containing neodymium compound in the electrolyte in the anode region and maintaining a more intense electrolyte circulation in the anode region than in the cathode region. Passing an electrolytic current between said anode and said cathode and depositing neodymium metal at the cathode, preventing the formation of perfluorinated carbon gases by limiting anode over voltage.
Keller; Rudolf (Export, PA), Larimer; Kirk T. (Pittsburgh, PA)
EMEC Consultants (Export, PA)
08/ 831,652
April 9, 1997
The Government has rights in this invention pursuant to Contract No. DE-FC07-91ID13104 awarded by the Department of Energy.