提锂母液萃取分离铯铷研究  

Separation of Cs and Rb from mother liquor after extracting lithium by solvent extraction

作　　者：张利珍[1,2] 谭秀民[1,2] 张秀峰[1,2] 李琦[1,2] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心

出　　处：《无机盐工业》2015年第9期62-64,共3页Inorganic Chemicals Industry

基　　金：地质调查项目(12120113087700);国土资源部公益性行业科研专项(201211069);863计划课题(2012AA061704)

摘　　要：研究采用4-叔丁基-2-(α-甲苄基)酚(t-BAMBP)+磺化煤油的萃取体系,从提锂母液中萃取分离铯、铷,考察料液碱度、t-BAMBP浓度、萃取相比、洗涤相比等因素对铯、铷分离的影响。适宜工艺条件:t-BAMBP浓度为1 mol/L,料液碱度[c(OH-)]为0.4 mol/L,萃取相比(O/A)为0.5,萃取时间为3 min;洗水用0.1 mol/L的氯化钠溶液,洗涤相比(O/A)为1,洗涤时间为3 min。在此条件下,经8级分馏萃取(3级萃取、5级洗涤),铯萃取率达99.79%,铷98.89%留在水相中,铯、铷分离效果较好。The process o f separating Cs and Rb from mother liquor after extracting lithium was investigated by using 4-t-butyl-2（α-methylbenzy） phenol（t-BAMBP） as extractant and sulfonated kerosene as thinner.The effects of alkalinity,concentration of t-BAMBP,extraction phase ratio,washing phase ratio,and other related factors on the separation of Cs and Rb were investigated.The optimal conditions were as follows：t-BAMBP＋sulfonated kerosene system of 1.0 mol/L,c（OH^-）=0.4 mol/L,extraction phase ratio of 0.5,extracting time of 3 min,0.1 mol/L NaCl solution as washing liquor,washing phase ratio of 1,and washing time of 3 min.Under these conditions with eight-stage（three-stage extraction and five-stage washing）fractionation extraction,the extraction rate of Cs was 99.79%,and 98.89% of Rb was kept in the aqueous phase.The separating effect of Cs and Rb was very good.

关 键 词：t-BAMBP 萃取 铯 铷 磺化煤油 

分 类 号：TQ131.15[化学工程—无机化工]