使用双金属盐作为协同萃取试剂从富镁溶液中萃取锂

Solvent Extraction Research and Development-japan Pub Date : 2024-03-22 DOI:10.15261/serdj.31.21

Wanji Zhou, Sixia Li

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引用次数: 0

摘要

本研究中，一种新的萃取体系 NaPF6 + NaClO4 + TBP 对 Li+ 的萃取效率与 NaPF6 + TBP 体系几乎相同，对 Li+ 的汽提效率也与 NaClO4 + TBP 体系几乎相同。研究了 NaClO4 和 NaPF6 浓度以及相比例对萃取效率的影响。在最佳条件下，Li+ 的单次萃取效率为 77.1%。TBP + NaPF6 + NaClO4 体系在从富含 Mg2+ 的溶液中萃取 Li+ 方面具有很大的潜力。

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Extraction of Lithium from Magnesium-Rich Solution Using Double Metal Salts as Co Extraction Reagents

In this study, a new extraction system NaPF₆ + NaClO₄ + TBP has nearly the same extraction efficiency of Li⁺ as the NaPF₆ + TBP system, and nearly the same stripping efficiency of Li⁺ as NaClO₄ + TBP system. The effect of NaClO₄ and NaPF₆ concentration, and phase ratio on extraction efficiency was investigated. At the optimal conditions, the single extraction efficiency of Li⁺ is 77.1%. The stripping efficiency of Li⁺ reaches 90.7% using pure water as a stripping agent with the volume ratio of the aqueous phase to the organic phase (A/O) of 3. TBP + NaPF₆ + NaClO₄ system has great potential in Li⁺ extraction from Mg²⁺ rich solution.

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Solvent Extraction Research and Development-japan

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