磷酸三丁酯—磺化煤油从盐湖卤水中萃取锂的动力学研究

Extraction Kinetics of Lithium from the Salt Lake Brine with Tri-butyl-Phosphate

中文关键词:  锂  TBP  萃取  动力学

英文关键词::Lithium  Tri-butyl-phosphate  Extraction  Kinetics

中文摘要:

      采用上升液滴法研究从盐湖卤水中萃取锂的动力学,主要考察了比界面积、水相锂浓度、铁浓度和有机相磷酸三丁酯(TBP)浓度对萃取速率的影响,通过对比界面积的研究发现随着比界面积的增大,萃取速率增大,这表明TBP萃取锂的反应发生在界面区域；通过对实验数据的非线性拟合得到了萃取体系的动力学方程,R=1.208×10-9[Li⁺]1.221[Fe³⁺]0.037675.393,其中实验值和计算值的均方根误差为1.544%。

英文摘要:

      :The kinetics of the extraction of lithium from salt lake brine system with Tri-butyl-phosphate has been investigated by the means of Rising Drop Method.Parameters affecting the mass transfer mechanism, including the interfacial area,lithium concentration, ion concentration and TBP concentration were studied.The experimental result showed the extraction reaction occur in interfacial area,and the rate equation of extracting lithium determined by non-slope analysis was R=1.208×10-9[Li⁺]1.221[Fe³⁺]0.037 675.393.The root mean square error of the experimental and calculated values of the extraction rate constants was 1.544×10-7.