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Separation of Valuable Elements from NiMH Battery Leach Liquor via Antisolvent Precipitation
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0002-2857-9128
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0003-4636-3889
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0003-1790-2310
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Resource recovery.ORCID iD: 0000-0002-3239-5188
2020 (English)In: Separation and Purification Technology, ISSN 1383-5866, E-ISSN 1873-3794, Vol. 234, article id 115812Article in journal (Refereed) Published
Abstract [en]

Rare earth elements (REE) have been selectively recovered from NiMH battery leach liquors by antisolvent precipitation. The active anode material was leached using sulfuric acid. The REE were then separated from the other elements by precipitation as sulfates after addition of either ethanol or 2-propanol (antisolvent). In a second step, Ni and Co are separated as sulfates by the same technique. The concentration of elements in different acid alcohol mixtures at 25 degrees C and -10 degrees C respectively are presented as a function of time after addition of the alcohol, and the optimum conditions for separation of the REE in pure form are presented. Under optimum conditions, 5.6 mol/L (Organic/Aqueous (O/A) volumetric ratio = 0.7) of 2-propanol at 25 degrees C, 82% of the REE have precipitated 3 h after addition of the antisolvent and the purity is 99.9%.

Place, publisher, year, edition, pages
2020. Vol. 234, article id 115812
Keywords [en]
Hydrometallurgy, Anti-solvent crystallization, NiMH battery recycling, Rare earth recovery
National Category
Chemical Process Engineering
Research subject
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-256457DOI: 10.1016/j.seppur.2019.115812ISI: 000491627200002Scopus ID: 2-s2.0-85072275062OAI: oai:DiVA.org:kth-256457DiVA, id: diva2:1345420
Funder
Swedish Energy Agency
Note

QC 20190902

Available from: 2019-08-23 Created: 2019-08-23 Last updated: 2020-01-08Bibliographically approved

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Korkmaz, KivancAlemrajabi, MahmoodRasmuson, Åke C.Forsberg, Kerstin
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