Photo‐switchable Collectors for the Flotation of Lithium Aluminate for the Recycling of the Critical Raw Material Lithium

Flotation of the mineral lithium aluminate by application of the natural product punicine from Punica granatum and some derivatives as collectors is examined. Punicines, 1‐(2',5'‐dihydroxyphenyl)‐pyridinium compounds, are switchable molecules whose properties can be changed reversibly. The...

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Bibliographic Details
Published in:ChemSusChem 2024-09, Vol.17 (18), p.e202301900-n/a
Main Authors: Zgheib, Ali, Fischer, Maximilian H., Namyslo, Jan C., Fittschen, Ursula E. A., Wollmann, Annett, Weber, Alfred P., Schmidt, Andreas
Format: Article
Language:English
Subjects:
Anions
Betaines
Chlorine
Collectors
Darkness
Daylight
EnAM
engineered artificial mineral
Flotation
Lithium
lithium aluminum hydroxide hydrate
Natural products
photochemistry
Punicine
pyridinium phenolate
Raw materials
Recovery
Zeta potential
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Summary:Flotation of the mineral lithium aluminate by application of the natural product punicine from Punica granatum and some derivatives as collectors is examined. Punicines, 1‐(2',5'‐dihydroxyphenyl)‐pyridinium compounds, are switchable molecules whose properties can be changed reversibly. They exist as cations, neutral mesomeric betaines, anions, and dianions depending on the pH. In light, they form radicals. Five punicine derivatives were prepared which possess β‐methyl, β‐chlorine, γ‐tert.‐butyl, and γ‐acetyl groups attached to the pyridinium ring, and a pyrogallol derivative. On the other hand, LiAlO2 reacts with water to give species such as LiAl2(OH)7 on its surface. Flotations were performed applying the punicines in daylight (3000 lux), in darkness (
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.202301900