Methods of Rare Earth Metal Recovery from Electronic Waste

Provided herein are methods of recovering rare earth metals from metallic waste using extraction and precipitation processes. In one embodiment, this application discloses a method of selectively extracting one or more rare earth metals from a metallic substrate, the method comprising the steps of:...

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Bibliographic Details
Main Authors Chittibabu, Kethinni, Warner, John C, Martino, Debora
Format Patent
LanguageEnglish
Published 04.02.2021
Subjects
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:Provided herein are methods of recovering rare earth metals from metallic waste using extraction and precipitation processes. In one embodiment, this application discloses a method of selectively extracting one or more rare earth metals from a metallic substrate, the method comprising the steps of: (a) crushing the metallic substrate to produce a crushed composition; (b) treating the crushed composition with a strong acid solution to produce an extraction composition; (c) heating the extraction composition; (d) adding a rare earth chelating agent to the heated extraction composition to produce a precipitate; and (e) isolating the precipitate.
Bibliography:Application Number: US202017073758