Metallothermic reduction of rare earth fluorides

Details Metallothermic reduction of rare earth fluorides Metallothermic reduction of rare earth fluorides

1990-12-06

1994-05-24

Walsh, Donald P.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

420416, 423 215, C22B 500

Patent

active

053145267

ABSTRACT:
A process is disclosed for the calcium reduction of rare earth fluorides, especially neodymium and/or praseodymium fluorides, in a minimum volume stirred molten calcium chloride reaction medium that produces high yield, high quality rare earth alloy with a calcium fluoride byproduct that can be recycled to generate more rare earth fluoride starting material.

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patent: 4767455 (1988-08-01), Jourdan
patent: 4786319 (1988-11-01), Zeiringer
patent: 4992096 (1991-02-01), Skach, Jr. et al.

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