Multi-component enhanced lithium extraction system and extraction method thereof

• Main Authors: LIU WENSEN, SU HUI, QI TAO, HU YAOXIAN, ZHU ZHAOWU
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a multi-component enhanced lithium extraction system and an extraction method thereof, and belongs to the technical field of extraction chemistry and chemical engineering. The extraction system provided by the invention comprises an extraction agent and a co-extraction agent, the extraction agent comprises aliphatic hydrocarbon phosphate, aromatic hydrocarbon phosphate and an acidic phosphine extraction agent; the co-extraction agent is Fe (III). According to the method, the separation effect of lithium and impurity elements Ca and Na in the extraction process is enhanced by adopting phosphate containing aromatic hydrocarbon groups, and the provided extraction system is suitable for low Mg, high Na and low chloride radical (llt; 200 g/L) and high calcium (gt; and Li can be efficiently extracted, and the yield of Li reaches 90% or above. 本发明提供了一种多组分强化提锂萃取体系及其萃取方法，属于萃取化学、化工技术领域。本发明提供的萃取体系包括萃取剂和共萃剂；所述萃取剂包括脂肪烃基磷酸酯、芳香烃基磷酸酯以及酸性膦萃取剂；所述共萃剂为Fe(Ⅲ)。本发明采用含芳香烃基的磷酸酯强化萃取过程锂与杂质元素Ca、Na的分离效果，提供的萃取体系适用于低M