摘要
以磷酸三丁酯(TBP)为萃取剂,磺化煤油为稀释剂,在六水合三氯化铁存在的条件下,从盐湖卤水中萃取锂。研究了TBP浓度对萃取率的影响,得到TBP最佳浓度为80%TBP+20%磺化煤油。通过斜率法、化学分析法、紫外光谱与红外光谱法,证实了锂离子(Li+)在溶液中与铁络阴离子(FeCl4-)形成铁氯络酸盐(LiFeCl4),LiFeCl4与TBP中的P O键作用配位形成二溶剂化物LiFeCl4.2TBP,从而达到与其他组分分离的目的。利用空腔理论阐述了萃取过程。
Lithium was extracted from salt lake brine with tributylphoshate（TBP） as extraction reagent,sulfonated kerosene as diluent,and FeCl3·6H2O as co-extraction reagent.Effect of TBP concentration on extraction rate was investigated,and experimental results showed that the optimum concentrations of TBP and sulfonated kerosene were 80% and 20% respectively.Slope method,chemical analysis,UV and IR spectra confirmed that the lithium-ion（Li＋） in solution reacted with FeCl4-to form LiFeCl4,and LiFeCl4 coordinated with P O bonds of TBP to form LiFeCl4·2TBP,so as to achieve the separation of lithium with other components.Extraction process was overviewed by cavity theory.
出处
《无机盐工业》
CAS
北大核心
2012年第3期12-15,24,共5页
Inorganic Chemicals Industry
基金
青海省科技支撑计划项目(2011-G-206A)
关键词
磷酸三丁酯
萃取
锂
tributhlphoshate
extraction
lithium
