t-BAMBP萃取分离高钾钠卤水中的铷工艺研究

The extraction and separation of rubidium from high potassium and sodium contained brine using t-BAMBP

摘要: 以二甲苯为稀释剂的t-BAMBP萃取体系，从高钾钠卤水中萃取分离铷.研究了有机相配比、料液碱度、相比、萃取时间及萃取温度对萃取分离铷效果的影响.研究结果表明：在有机相组成（体积分数）为30% t-BAMBP+70% 二甲苯，料液Rb⁺初始浓度为0.011 7 mol/L，料液碱度为0.4 mol/L，相比VO/VA（有机相体积比水相体积）为1/1，萃取时间为4 min，萃取温度为21 ℃的条件下，经过五级逆流萃取，铷萃取率达95.5%.通过对料液进行多段萃取处理，可获得高纯度的铷盐.

Abstract: T-BAMBP extraction system with xylene as diluent was taken to separate rubidium from brine contained high potassium and sodium. The influences of organic phase composition， feed liquid alkalinity，organic-aqueous phase ratio， extraction time and temperature on extraction and separation efficiency were researched. The results showed that extraction rate of rubidium after five stage countercurrent extraction can reach 95.5% using 30% volume fraction t-BAMBP contained organic extractant with 0.4mol/L feed liquid alkalinity，0.0117mol/L initial concentration of Rb⁺，1:1 phase ratio， 4 minutes extraction time and 21℃ extraction temperature. Highly purified rubidium salt can be obtained through multistage extraction.