Novel process for the extraction of lithium from β-spodumene by leaching with HF

Rosales, Gustavo D.; Ruiz, Manuel; Rodríguez, M. H.

doi:10.1016/j.hydromet.2014.04.009

Cited by 102 publications

(48 citation statements)

References 13 publications

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“…In accordance with the bibliography, (Rosales et al 2013(Rosales et al , 2014, we found that the dissolution reaction of metakaolin in HF occurs as follows:…”

Section: Leaching Experimentssupporting

confidence: 79%

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Hydrometallurgical extraction of Al and Si from kaolinitic clays

et al. 2017

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Herein is presented the results of a study on the hydrometallurgic extraction and recovery of aluminum and silicon by leaching of kaolinitic clays with HF. The studied extraction parameters were: temperature, reaction time, solid/liquid ratio, concentration, and precipitating agent mass. In the leaching process, mineral dissolutions near 100% were obtained when working at 348 K, solid/liquid ratio 2% w/v, HF 12% v/v, for 120 minutes. The HF leach liquor generated from the dissolution of kaolinitic clays contains H 2 SiF 6 and H 3 AlF 6 . Studies were conducted to recover the two valuable fluorides as K 2 SiF 6 and Na 3 AlF 6 by precipitation with alkaline salts from the leach liquor. Phases of precipitated fluorides were identified by XRD and surface morphology by SEM. The purity of the K 2 SiF 6 precipitate was 98.8%, whereas for Na 3 AlF 6 , it was 89.3%. Also, both synthesized solids are of high commercial value due to their industrial applications.

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“…In accordance with the bibliography, (Rosales et al 2013(Rosales et al , 2014, we found that the dissolution reaction of metakaolin in HF occurs as follows:…”

Section: Leaching Experimentssupporting

confidence: 79%

“…Al 2 O 3 2SiO 2(s) + 24HF (aq) ⎯→ 2H 3 AlF 6(aq) + 2H 2 SiF 6(aq) + 7H 2 O The dissolution efficiency (Rosales et al 2013(Rosales et al , 2014 was calculated by using Equation (3):…”

Section: Leaching Experimentsmentioning

confidence: 99%

Hydrometallurgical extraction of Al and Si from kaolinitic clays

et al. 2017

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“…The reactions proposed for obtaining these compounds are the following [16][17][18]: The XRD patterns in Figure 1 show that the sample is mainly composed of lepidolite (ICDD 01-085-0398), with the presence of albite (ICDD 96-900-1631) and quartz (JCPDS 33-1161) as gangue.…”

Section: Recovery Assaysmentioning

confidence: 99%

“…where: Li m is the initial amount of lithium in the mineral and Li s is the amount of the element in the leach liquor [16,17]. The experimental study of this work was performed by univariate analysis.…”

Section: Leaching Assaysmentioning

confidence: 99%

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Recovery Process of Li, Al and Si from Lepidolite by Leaching with HF

et al. 2017

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This work describes the development of a new process for the recovery of Li, Al and Si along with the proposal of a flow sheet for the precipitation of those metals. The developed process is comprised of lepidolite acid digestion with hydrofluoric acid, and the subsequent precipitation of the metals present in the leach liquor. The leaching operational parameters studied were: reaction time, temperature and HF concentration. The experimental results indicate that the optimal conditions to achieve a Li extraction higher than 90% were: solid-liquid ratio, 1.82% (w/v); temperature, 123 • C; HF concentration, 7% (v/v); stirring speed, 330 rpm; and reaction time, 120 min. Al and Si can be recovered as Na 3 AlF 6 and K 2 SiF 6 . LiF was separated from the leach liquor during water evaporation, with recovery values of 92%.

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Extraction and Purification of Lithium from Minerals

Wilson,

Gilligan,

Nikoloski

2024

Kirk-Othmer Encyclopedia of Chemical Technology

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Demand for lithium‐ion batteries for use in electric vehicles is driving lithium demand. A large increase in demand between now and 2040 is expected due to increasing electrification of the transport and energy sectors of the economy. This is in part due to an interest in improving air quality in cities and in the reduction of greenhouse gas emissions when electricity is generated without fossil fuel combustion. Currently, the two major natural sources of lithium for use in lithium‐ion batteries are brines and hard‐rock minerals. Lithium‐bearing clays have also been investigated as a potential source of lithium. Battery recycling is another potential source. Lithium in hard‐rock minerals is predominantly found in pegmatites. Lithium‐bearing minerals that may occur in pegmatites include petalite, lepidolite, and spodumene. The latter is currently the predominant hard‐rock lithium source. Following comminution, a number of treatments or combinations of treatments can be used to produce materials suitable for the final stage of purification of lithium products. Most involve high‐ or very‐high‐temperature treatments with various reagents followed by water leaching, although a few treat lithium‐bearing feed directly with acid leaching. Other elements are co‐leached and must be separated from lithium to allow the production of high‐purity lithium carbonate or lithium hydroxide, which are then used to manufacture lithium‐ion battery cathodes.

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Novel process for the extraction of lithium from β-spodumene by leaching with HF

Cited by 102 publications

References 13 publications

Hydrometallurgical extraction of Al and Si from kaolinitic clays

Hydrometallurgical extraction of Al and Si from kaolinitic clays

Recovery Process of Li, Al and Si from Lepidolite by Leaching with HF

Extraction and Purification of Lithium from Minerals

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