Rare earth/iron fluoride and methods for making and using same

Patent · Tue Dec 17 00:00:00 EST 1991

OSTI ID:868091

Schmidt, Frederick A ^[1]; Wheelock, John T ^[2]; Peterson, David T ^[1]

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1. Ames, IA
2. Neveda, IA

A particulate mixture of Fe.sub.2 O.sub.3 and RE.sub.2 O.sub.3, where RE is a rare earth element, is reacted with an excess of HF acid to form an insoluble fluoride compound (salt) comprising REF.sub.3 and FeF.sub.3 present in solid solution in the REF.sub.3 crystal lattice. The REF.sub.3 /FeF.sub.3 compound is dried to render it usable as a reactant in the thermite reduction process as well as other processes which require an REF.sub.3 /FeF.sub.3 mixture. The dried REF.sub.3 /FeF.sub.3 compound comprises about 5 weight % to about 40 weight % of FeF.sub.3 and the balance REF.sub.3 to this end.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• Assignee: Iowa State University Research Foundation, Inc. (Ames, IA)
• Patent Number(s): US 5073337
• Application Number: 07/554,189
• OSTI ID: 868091
• Country of Publication: United States
• Language: English

Related Subjects

rare
earth
iron
fluoride
methods
particulate
mixture
element
reacted
excess
hf
acid
form
insoluble
compound
salt
comprising
fef
solid
solution
crystal
lattice
dried
render
usable
reactant
thermite
reduction
process
processes
require
comprises
weight
40
balance
rare earth
solid solution
reduction process
crystal lattice
particulate mixture
earth element
thermite reduction
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