Process for preparing praseodynium metal or praseodymium-contain

Details Process for preparing praseodynium metal or praseodymium-contain Process for preparing praseodynium metal or praseodymium-contain

1989-08-22

1990-10-30

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 64R, C25C 334, C25C 336

Patent

active

049666622

ABSTRACT:
A process for the preparation of a praseodymium-iron alloy or a praseodymium-neodymium-iron alloy, which comprises using praseodymium fluoride (PrF.sub.3) or a mixture of praseodymium fluoride and neodymium fluoride (NdF.sub.3) as the starting material and carrying out the electrolysis in fused a salt bath having a composition comprising substantially 5 to 34% by weight of PrF.sub.3 or a mixture of PrF.sub.3 and NdF.sub.3 and 95 to 66% by weight of lithium fluoride (LiF) by using an iron cathode, and a process for the preparation of praseodymium metal or a praseodymium-neodymium alloy which comprises using praseodymium fluoride (PrF.sub.3) or a mixture of praseodymium fluoride and neodymium fluoride (NdF.sub.3) as the starting material and carrying out the electrolysis in a fused salt bath having a comprising substantially 5 to 75% by weight of PrF.sub.3 or the mixture of PrF.sub.3 and NdF.sub.3 and 95 to 25% by weight of lithium fluoride (LiF) by using a cathode of carbon or an infusible metal.

REFERENCES:
patent: 3729397 (1973-04-01), Goldsmith et al.
patent: 4627898 (1986-12-01), Ghandahari
E. Morrice et al., U.S. Dept. Interior, Report of Investigations 6957, (1967).
E. Morrice et al., U.S. Dept. Interior, Report of Investigations 7146, (1968).
R. E. Toma, Progress in Science and Technology of the Rare Earths, vol. 2, p. 110, Pergamon Press, New York, 1966.

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