Separation of valuable elements from NiMH battery leach liquor via antisolvent precipitation

Kivanc Korkmaz; Mahmood Alemrajabi; Åke C. Rasmuson; Kerstin M. Forsberg

doi:10.1016/j.seppur.2019.115812

Separation of valuable elements from NiMH battery leach liquor via antisolvent precipitation

Kivanc Korkmaz, Mahmood Alemrajabi, Åke C. Rasmuson, Kerstin M. Forsberg

KTH Royal Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

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 °C and −10 °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 °C, 82% of the REE have precipitated 3 h after addition of the antisolvent and the purity is 99.9%.

Original language	English
Article number	115812
Journal	Separation and Purification Technology
Volume	234
DOIs	https://doi.org/10.1016/j.seppur.2019.115812
Publication status	Published - 1 Mar 2020
Externally published	Yes

Keywords

Anti-solvent crystallization
Hydrometallurgy
NiMH battery recycling
Rare earth recovery

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.seppur.2019.115812

Cite this

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title = "Separation of valuable elements from NiMH battery leach liquor via antisolvent precipitation",

abstract = "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 °C and −10 °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 °C, 82% of the REE have precipitated 3 h after addition of the antisolvent and the purity is 99.9%.",

keywords = "Anti-solvent crystallization, Hydrometallurgy, NiMH battery recycling, Rare earth recovery",

author = "Kivanc Korkmaz and Mahmood Alemrajabi and Rasmuson, {{\AA}ke C.} and Forsberg, {Kerstin M.}",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2020",

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doi = "10.1016/j.seppur.2019.115812",

language = "English",

volume = "234",

journal = "Separation and Purification Technology",

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TY - JOUR

T1 - Separation of valuable elements from NiMH battery leach liquor via antisolvent precipitation

AU - Korkmaz, Kivanc

AU - Alemrajabi, Mahmood

AU - Rasmuson, Åke C.

AU - Forsberg, Kerstin M.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - 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 °C and −10 °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 °C, 82% of the REE have precipitated 3 h after addition of the antisolvent and the purity is 99.9%.

AB - 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 °C and −10 °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 °C, 82% of the REE have precipitated 3 h after addition of the antisolvent and the purity is 99.9%.

KW - Anti-solvent crystallization

KW - Hydrometallurgy

KW - NiMH battery recycling

KW - Rare earth recovery

UR - http://www.scopus.com/inward/record.url?scp=85072275062&partnerID=8YFLogxK

U2 - 10.1016/j.seppur.2019.115812

DO - 10.1016/j.seppur.2019.115812

M3 - Article

AN - SCOPUS:85072275062

SN - 1383-5866

VL - 234

JO - Separation and Purification Technology

JF - Separation and Purification Technology

M1 - 115812

ER -

Separation of valuable elements from NiMH battery leach liquor via antisolvent precipitation

Abstract

Keywords

UN SDGs

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