| 磷酸三丁酯从盐湖卤水中萃取锂的机理研究 |
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| 引用本文： | 张燕辉,李丽娟,李晋峰,姬连敏,许庆仁,陈光华.磷酸三丁酯从盐湖卤水中萃取锂的机理研究[J].无机盐工业,2012,44(3):12-15,24. |
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| 作者姓名： | 张燕辉 李丽娟 李晋峰 姬连敏 许庆仁 陈光华 |
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| 作者单位： | 1.中国科学院青海盐湖研究所，中国科学院盐湖资源与化学重点实验室，青海西宁810008；2.中国科学院
上海有机化学所，中国科学院生命有机化学国家重点实验室；3.中国科学院研究生院 |
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| 基金项目： | 青海省科技支撑计划项目(2011-G-206A) |
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| 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PO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。
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| 关 键 词： | 磷酸三丁酯 萃取 锂 |
Study on mechanism of extraction of lithium from salt lake brine by tributylphosphate |
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| Zhang Yanhui
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Li Lijuan
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Li Jinfeng
,
Ji Lianmin
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Xu Qingren
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Chen Guanghua.Study on mechanism of extraction of lithium from salt lake brine by tributylphosphate[J].Inorganic Chemicals Industry,2012,44(3):12-15,24. |
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| Authors: | Zhang Yanhui Li Lijuan Li Jinfeng Ji Lianmin Xu Qingren Chen Guanghua |
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| Affiliation: | 1.Key Laboratory of Salt Lake Resources and Chemistry，Qinghai Institute of Salt Lakes，CAS，Xining 810008，China；
2.State Key Laboratory of Bio-organic Chemistry，Shanghai Institute of Organic Chemistry；3.Graduate University，CAS |
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| Abstract: | 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. |
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| Keywords: | tributhlphoshate extraction lithium |
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