| 盐湖卤水萃取提锂及其机理研究 | |
| Extraction of Lithium from Salt Lake Brine and Mechanism Research | |
| 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。 | |
| 关键词: 萃取 卤水 锂 磷酸三丁酯 | |
| 基金项目: | |
| 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. | |
| Keywords: extraction brine lithium TBP | |
| 摘要点击次数: 2271 | |
| 全文下载次数: 2268 | |
| 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. | |
| 查看全文 查看/发表评论 下载PDF阅读器 | |
| Support information: | |
|
| |
|
| |
|
| |