| 盐湖卤水萃取提锂及其机理研究 |
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| 引用本文： | 孙淑英,叶 帆,宋兴福,李云钊,汪 瑾,于建国.盐湖卤水萃取提锂及其机理研究[J].无机化学学报,2011,27(3):439-444. |
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| 作者姓名： | 孙淑英 叶 帆 宋兴福 李云钊 汪 瑾 于建国 |
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| 作者单位： | 华东理工大学化学工程联合国家重点实验室,上海,200237 |
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| 基金项目： | 中央高校基本科研业务费专项资金; 国家自然科学基金(No.20906022)资助项目 |
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| 摘 要： | 本文以磷酸三丁酯(TBP)为萃取剂，煤油为稀释剂，在FeCl3存在的条件下，选择性萃取盐湖卤水中的锂。系统研究了相比、萃取剂组成、铁锂比等对锂萃取率的影响，及洗涤、反萃取工艺条件。得到最佳工艺条件为：萃取相比VO/VA为1.5，TBP质量分数为75%，cFe3+/cLi+=2，cH+=0.02 mol·L-1，萃取时间为20 min；洗涤相比VO/VA为15；反萃取相比VO/VA为20。并运用红外与核磁方法分析研究，表明是TBP上的P=O双键与LiFeCl4金属配合物的配位水分子产生氢键作用而使金属配合物与TBP结合。
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| 关 键 词： | 萃取 卤水 锂 磷酸三丁酯 |
Extraction of Lithium from Salt Lake Brine and Mechanism Research |
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| SUN Shu-Ying,YE Fan,SONG Xing-Fu,LI Yun-Zhao,WANG Jin and YU Jian-Guo.Extraction of Lithium from Salt Lake Brine and Mechanism Research[J].Chinese Journal of Inorganic Chemistry,2011,27(3):439-444. |
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| Authors: | SUN Shu-Ying YE Fan SONG Xing-Fu LI Yun-Zhao WANG Jin and YU Jian-Guo |
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| Institution: | State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China,State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China and State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | The paper presents extraction of lithium from salt lake brine by tributyl phosphate(TBP)- kerosene- FeCl3 extraction system. Extraction, washing and back extraction stages were studied systematically. The best conditions were determined by studying the single factors of extraction VO/VA ratio, extractant composition, molar ratio of Fe3+ to Li+ and so on, and the results were: extraction VO/VA is 1.5, TBP% is 75%, cFe3+/cLi+ is 2, cH+ is 0.02 mol·L-1, extraction time is 20 min; washing VO/VA is 15; back extraction VO/VA is 20. The interaction of lithium complex with TBP was investigated by IR and NMR. The results showed that the complex and TBP were associated by hydrogen bond. |
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| Keywords: | extraction brine lithium TBP |
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