4-Tert-butyl-2-(α-methylbenzyl) phenol(t-BAMBP) was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase p H on the rubidium a...4-Tert-butyl-2-(α-methylbenzyl) phenol(t-BAMBP) was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase p H on the rubidium and lithium extraction equilibrium was studied. t-BAMBP/cyclohexane was ef ficient and selective for rubidium extraction with optimal operating conditions being p H of 13.0 and initial t-BAMBP concentration of1.0 mol·L-1. The stoichiometry of the complex of t-BAMBP with rubidium is 4:1. The apparent extraction equilibrium constant of rubidium was calculated by fitting the experimental data.展开更多
基金Project(20606008)supported by the National Natural Science Foundation of ChinaProject(11070210)supported by the Fundamental Research Funds for the Central Universities of China
文摘将工厂提钾后的盐湖卤水作为提取Rb+和Cs+的实验用卤水,将萃取剂t-BAMBP的磺化煤油溶液作为有机相进行萃取。在萃取之前预先沉淀出镁并作为一种产品,在反萃前再多次洗涤分离出大部分的K+和Na+,最终使Rb+和Cs+得到有效富集和分离。研究油水相比(O/A)、水相的碱性(c(OH-)、K+和Mg2+的含量及洗涤油水相比(O/A′)对萃取过程的影响。最佳工艺条件为:1.0 mol/L的t-BAMBP磺化煤油溶液,水相碱性c(OH-)=1 mol/L,油水相比O/A=1:1。当用1×10-4 mol/L Na OH溶液洗涤萃取油相3次,洗涤油水相比O/A′=1:0.5时,铷和铯的洗脱率仅为10.5%。经过5级逆流萃取,最终铷和铯的萃取率分别达到了95.04%与99.80%。
基金Supported by the research fund for the Doctoral Program of Education Ministry of China(20120002110098)
文摘4-Tert-butyl-2-(α-methylbenzyl) phenol(t-BAMBP) was used in cyclohexane in the extraction of rubidium from brine sources containing lithium. The effect of t-BAMBP concentration and aqueous phase p H on the rubidium and lithium extraction equilibrium was studied. t-BAMBP/cyclohexane was ef ficient and selective for rubidium extraction with optimal operating conditions being p H of 13.0 and initial t-BAMBP concentration of1.0 mol·L-1. The stoichiometry of the complex of t-BAMBP with rubidium is 4:1. The apparent extraction equilibrium constant of rubidium was calculated by fitting the experimental data.