Metallothermic reduction of rare earth chlorides

Details Metallothermic reduction of rare earth chlorides Metallothermic reduction of rare earth chlorides

1986-03-18

1987-07-14

Terapane, John F.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 66, 75 67R, 423497, C22B 5900, C01F 1124

Patent

active

046800557

ABSTRACT:
Rare earth chlorides and oxychlorides can be reduced to substantially pure rare earth metals by a novel, high yield, metallothermic process. The rare earth chloride feedstock is dispersed in a vessel containing a suitable molten chloride salt bath and a molten metal collection pool. Enough sodium, potassium and/or calcium is added to the bath to produce a stoichiometric excess of calcium metal with respect to the rare earth. The bath is stirred such that the calcium metal reduces the rare earth feedstock. Stirring is stopped and the reduced rare earth metal is collected in the metal pool in the reaction vessel.

REFERENCES:
patent: 1437984 (1922-12-01), Marden
patent: 1682846 (1928-09-01), Kremers
patent: 2714554 (1955-08-01), Spedding et al.
patent: 2852363 (1958-09-01), Adams et al.
patent: 2950962 (1960-08-01), Carlson et al.
patent: 3000726 (1961-09-01), Spedding et al.
patent: 3014797 (1961-12-01), Elisher
patent: 3265492 (1966-08-01), Juckniess
patent: 3625779 (1971-12-01), Cech
patent: 3748193 (1973-07-01), Cech
patent: 3883346 (1975-05-01), Martin
patent: 3928089 (1975-12-01), Cech
patent: 4496395 (1985-01-01), Crout
patent: 4578242 (1986-03-01), Sharma
"Rare Earth Elements and Metals", Van Nostrand's Scientific Encyclopedia, 5th Ed., 1976, pp. 1886-1890.
Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed., v 19, 1982, pp. 846-850.

Affiliated with

Also associated with

Rating

Metallothermic reduction of rare earth chlorides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metallothermic reduction of rare earth chlorides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallothermic reduction of rare earth chlorides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1426287