Metallothermic reduction of rare earth oxides

Details Metallothermic reduction of rare earth oxides Metallothermic reduction of rare earth oxides

1984-07-03

1986-03-25

Brody, Christopher W.

Alloys or metallic compositions

Processes

75 84, 75129, C22B 5900, C22C 100

Patent

active

045782423

ABSTRACT:
Rare earth oxides can be reduced to rare earth metals by a novel, high yield, metallothermic process. The oxides are dispersed in a suitable, molten, calcium chloride bath along with sodium metal. The sodium reacts with the calcium chloride to produce calcium metal which reduces the rare earth oxides to rare earth metals. The metals are collected in a discrete layer in the reaction vessel.

REFERENCES:
patent: 1682846 (1928-09-01), Kremers
patent: 3625779 (1971-12-01), Cech
patent: 3748193 (1973-07-01), Cech
patent: 3883346 (1975-05-01), Martin
patent: 3928089 (1975-12-01), Cech
"Rare Earth Elements and Metals" Van Nostrand's Scientific Encyclopedia 5th ed., 1976, pp. 1886-1890.

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