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Lithium Recovery from a Clay-Type Ore by Pressure Leaching Oxidation: A Kinetic Study

Guadalupe Lizeth Leyva-Soriano, Jesús Leobardo Valenzuela-García

2026eslithiumextractionleachingclaykinetics

Abstract

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The increasing demand for lithium in energy storage technologies has renewed interest in clay-type deposits as alternative resources to brines and hard rock ores. This study investigates the leaching behavior of a Mexican clay-type lithium ore through conventional, hot, and pressure leaching using sulfuric acid. Mineralogical characterization (XRD and SEM–EDS) revealed that montmorillonite (~56 wt.%) is the primary lithium-bearing phase. Conventional leaching with 1–8 M H2SO4 resulted in limited lithium dissolution (<30% after 24 h), whereas hot leaching at 80 ◦C increased extraction to ~39%. Pressure leaching with oxygen overpressure significantly enhanced lithium dissolution, achieving ~64% within 180 min under 8 M H2SO4 and 80 ◦C. Kinetic modeling using a pseudo-first-order model accurately reproduced the extraction profiles, yielding increasing rate constants and equilibrium conversions with temperature. The low activation energy (~12 kJ·mol−1) indicates that lithium dissolution proceeds readily under the studied conditions.

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Cite This Work

@article{8696d39a-5a6e-4e54-a426-ff1519094eb7,
  title={Lithium Recovery from a Clay-Type Ore by Pressure Leaching Oxidation: A Kinetic Study},
  author={Guadalupe Lizeth Leyva-Soriano and Jesús Leobardo Valenzuela-García},
  year={2026},
  language={es}
}
TY  - JOUR
TI  - Lithium Recovery from a Clay-Type Ore by Pressure Leaching Oxidation: A Kinetic Study
AU  - Guadalupe Lizeth Leyva-Soriano
AU  - Jesús Leobardo Valenzuela-García
PY  - 2026
LA  - es
ER  -

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