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US 12,692,612 B2Granted
Recovery of rare earth metals from ferromagnetic alloys
AssigneeYeda Research and Development Co. Ltd.
InventorsIgor Lubomirsky, Valery Kaplan
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Abstract
Methods for recovery of at least one rare earth metal from ferromagnetic alloy are described, and further methods of atomic hydrogen decrepitation of a ferromagnetic alloy.
Claims19
A method of atomic hydrogen decrepitation of a ferromagnetic alloy, wherein the method comprises;
- electrolyzing an aqueous solution, thereby releasing an atomic hydrogen from a cathode within an electrochemical cell;
- and
- reacting the ferromagnetic alloy with the released atomic hydrogen, wherein the ferromagnetic alloy is attached to the cathode;
- to obtain a ferromagnetic alloy powder having grain size ≤50 μm.
1 more element
A method for recovery of at least one rare earth metal from a ferromagnetic alloy, the method comprises:
- (a) reacting the ferromagnetic alloy with at least one chlorine-containing gas to obtain a volatile iron-containing chloride product and non-volatile at least one rare earth metal chloride;
- (b) providing air flow to said volatile iron-containing chloride product, thereby oxidizing the iron-containing chloride product to iron oxide;
- (c) separating said iron oxide product and non-volatile at least one rare earth metal chloride;
- (d) cooling said separated non-volatile at least one rare earth metal chloride;
- (e) electrolyzing said cooled non-volatile at least one rare earth metal chloride;
- thereby recovering said at least one rare earth metal.
3 more elements
Dependencies are inferred from the claim text.