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Rare earths recovery from NiMH spent batteries

TitleRare earths recovery from NiMH spent batteries
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2002
AuthorsPietrelli, L., Bellomo B., Fontana Danilo, and Montereali Maria Rita
Keywordscobalt, Electric batteries, Hydrometallurgy, leaching, Nickel compounds, Precipitation (chemical), Rare earth elements, Separation, Spent batteries, X ray diffraction analysis

Nickel-metal hydride batteries (NiMH) contain rare earths (RE) and a variety of valuable metals such as nickel and cobalt. Using a hydrometallurgical process developed for the recovery of metals from spent batteries, a selective separation of RE by precipitation of Sodium RE double sulfate can be performed. Leaching solution was obtained by using 2 M H2SO4 at 20 °C. The paper reports the experimental studies involving the precipitation process and the characterisation by X-ray diffraction of the resulting product (Sodium RE double sulfates). It has been shown that it is possible to recover about 80% of the RE contained in spent NiMH batteries. © 2002 Elsevier Science B.V. All rights reserved.


cited By 70

Citation KeyPietrelli2002135