萃取法从盐湖卤水提取铷实验研究

研究了t-BAMBP［4-叔丁基-2-（α-甲基苄基）苯酚］/磺化煤油萃取体系，从提铯后的母液中，萃取分离钾铷的过程。考察了萃取时间、萃取剂浓度、萃取相比等萃取条件、水洗条件和反萃取条件对铷钾分离的影响。确定了适宜的工艺条件为：t-BAMBP浓度为0.7 mol/L，相比O/A=3∶1，萃取时间为5 min；以0.1 mol/L氯化钠溶液为洗涤剂，洗涤相比O/A=4∶1；以0.5 mol/L 氯化氢溶液为反萃剂，反萃相比O/A=5∶1。经过5级逆流反萃，铷的反萃率达到95.6%以上，铷钾的分离系数较高，实现了铷钾分离。

Experimental research on extracting rubidium from salt lake brine

The process of separating Rb and K from mother liquid after extracting Cs was investigated by using t-BAMBP as extractant and sulfated kerosene as diluent.The effects of reaction time，concentration of t-BAMBP，extraction phase ratio， and other related factors on the separation of Rb and K were also investigated.The optimal conditions were as follows：t-BAMBP/sulfated kerosene system was 0.7 mol/L，extracting time was 5 min，extraction phase ratio was 3∶1；0.1 mol/L NaCl as washing liquor，washing phase ratio was 4∶1；0.5 mol/L HCl solution as stripping agent，phase ratio was 5∶1.After 5 stages countercurrent stripping，the stripping rate of Rb increased above 95.6%，with a higher separation coefficient of Rb/K and achieved the separation of rubidium and potassium.