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<p>A process for producing high-quality Li<sub>2</sub>CO<sub>3</sub> from Li-containing clay minerals is developed. It relies on chemical digestion in acidic media and exhibits an overall lithium recovery efficiency of 70%. These results are supported by the proper characterization of Li-containing clay both before and after acidification, using XRD combined with structural refinement. The characterization strategy, although all the implicated limitations for a direct and quantitative analysis of lithium concentrations, is reliable in determining whether a mineral contains lithium or not, and it follows from a correct compositional determination. Other similar processing routes have been explored with the potential for higher efficiency.</p> Graphical abstract <p></p>

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Compositional determination and lithium recovery from a mica-type clay: Taming Li2CO3 production to aid environmental remediation

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Oswaldo Sánchez-Dena,
  • Axel Torres,
  • Adrián Bonilla-Petriciolet,
  • Heriberto Pfeiffer,
  • Rurik Farías

摘要

A process for producing high-quality Li2CO3 from Li-containing clay minerals is developed. It relies on chemical digestion in acidic media and exhibits an overall lithium recovery efficiency of 70%. These results are supported by the proper characterization of Li-containing clay both before and after acidification, using XRD combined with structural refinement. The characterization strategy, although all the implicated limitations for a direct and quantitative analysis of lithium concentrations, is reliable in determining whether a mineral contains lithium or not, and it follows from a correct compositional determination. Other similar processing routes have been explored with the potential for higher efficiency.

Graphical abstract