Extraction of neodymium from hard disk drives using supercritical CO2 with organic acids solutions acting as cosolvents

Reisdörfer, Gustavo; Bertuol, Daniel Assumpção; Tanabe, Eduardo Hiromitsu

doi:10.1016/j.jcou.2019.10.008

Cited by 14 publications

(3 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impact of various factors on the chelation of metals with TTA-TBP exhibits the dependence of temperature, pressure and contact time [97]. Reisdo ¨rfer et al [100] reported the use of supercritical CO 2 with organic acids as cosolvents for the recovery of Nd from the hard disk drives. The extraction of the unroasted powder with supercritical CO 2 , at 90 °C and 120 bar gave rise to 50.5 % and 99.4 % Nd recovery efficiency after 30 min, using citric and malic acid, respectively.…”

Section: Pyrometallurgymentioning

confidence: 99%

“…Supercritical CO 2 was extremely helpful to recover Nd from the unroasted powder using malic acid, reducing the extraction time from 360 min to 30 min. For the roasted NdFeB powder, it was possible to extract 99.5 % of the Nd after 120 min with the use of supercritical CO 2 and malic acid, while maximum recovery was achieved with atmospheric leaching was only 21.0 % even after 360 min [100]. The static and dynamic extraction of Nd from Nd 2 O 3 were investigated with the TBP-HNO 3 complex in sc-CO 2 .Static extraction was 94.69 % with 4.54 M acid at 323.15 K and 15 MPa after 2 h while in case of dynamic extraction efficiency was 97.68 % at 323.15 K and 21 MPa after 3 h with 2.52 M acidity.…”

Section: Pyrometallurgymentioning

confidence: 99%

See 1 more Smart Citation

An Overview on Resource and Recovery Prospectives of the Critical Element Neodymium

Pradhan

Mishra

2023

ChemBioEng Reviews

View full text Add to dashboard Cite

Neodymium is critically scarce and is often used in supportable technologies such as permanent magnets, batteries, and catalysts. The extraction of it from virgin ores causes environmental degradation and recycling of end‐of‐life (EOL) products proves to be an alternative to meet its future criticality. From an environmental and economic point of view, magnets produced from recovered neodymium perform better than the ones produced from virgin neodymium. In this review various technologies such as hydro metallurgy, pyro metallurgy, supercritical CO2 extraction, desalination, and adsorption have been discussed for the recovery of this metal from different EOL sources. The advantages and limitations of these methods are summarized. Different experimental status like sources, temperature, aqueous phase composition, organic phase make up, and maximum recovery efficiency are also looked upon. This review may prove beneficial for the researchers to design recovery road maps under different circumstances.

show abstract

Section: Pyrometallurgymentioning

confidence: 99%

Section: Pyrometallurgymentioning

confidence: 99%

An Overview on Resource and Recovery Prospectives of the Critical Element Neodymium

Pradhan

Mishra

2023

ChemBioEng Reviews

View full text Add to dashboard Cite

show abstract

“…If, however, more purification or elemental separation must be performed, additional process steps are required such as: (i) chlorination using safer agents such as NH 4 Cl [220,221]; (ii) advanced leaching [222][223][224][225][226][227][228][229][230][231][232][233][234][235][236]; (iii) or even bioleaching using bacteria which avoids the use of strong acids [237]; (iv) hydrometallurgy (solid-liquid or liquid-liquid extraction) [15,210,[238][239][240][241][242][243][244]; as well as (v) electrodeposition at the reduction step, including in ionic liquids [245][246][247][248][249][250][251][252][253] and molten salts [254][255][256][257][258][259], with their wide electrochemical stability [260].…”

Section: Rare-earth Elementsmentioning

confidence: 99%

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

et al. 2021

View full text Add to dashboard Cite

This critical review focuses on advanced recycling strategies to enable or increase recovery of chemical elements present in waste printed circuit boards (WPCBs). Conventional recycling involves manual removal of high value electronic components (ECs), followed by raw crushing of WPCBs, to recover main elements (by weight or value). All other elements remain unrecovered and end up highly diluted in post-processing wastes or ashes. To retrieve these elements, it is necessary to enrich the waste streams, which requires a change of paradigm in WPCB treatment: the disassembly of WPCBs combined with the sorting of ECs. This allows ECs to be separated by composition and to drastically increase chemical element concentration, thus making their recovery economically viable. In this report, we critically review state-of-the-art processes that dismantle and sort ECs, including some unpublished foresight from our laboratory work, which could be implemented in a recycling plant. We then identify research, business opportunities and associated advanced retrieval methods for those elements that can therefore be recovered, such as refractory metals (Ta, Nb, W, Mo), gallium, or lanthanides, or those, such as the platinum group elements, that can be recovered in a more environmentally friendly way than pyrometallurgy. The recovery methods can be directly tuned and adapted to the corresponding stream.

show abstract

Hydrometallurgical Processing of Electronic Waste

Kaya,

Hussaini

2023

Electronic Waste Management

View full text Add to dashboard Cite

Extraction of neodymium from hard disk drives using supercritical CO2 with organic acids solutions acting as cosolvents

Cited by 14 publications

References 75 publications

An Overview on Resource and Recovery Prospectives of the Critical Element Neodymium

An Overview on Resource and Recovery Prospectives of the Critical Element Neodymium

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

Hydrometallurgical Processing of Electronic Waste

Contact Info

Product

Resources

About