以t-BAMBP+磺化煤油萃取体系萃取分离低浓度的铷  

Solvent extraction of low concentration rubidium with t-BAMBP and sulfated kerosene

作　　者：张利珍[1,2,3] 谭秀民 张秀峰[1,2,3] 张永兴 李琦[1,2,3] 

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 [3]国土资源部多金属矿评价与综合利用重点实验室

出　　处：《无机盐工业》2017年第11期37-40,共4页Inorganic Chemicals Industry

基　　金：中国地质调查局地质调查项目(DD20160073)

摘　　要：采用t-BAMBP[4-叔丁基-2-(α-甲苄基)酚]+磺化煤油的萃取体系,从回收钠盐后的浓缩液中萃取分离低浓度的铷,考察了料液碱度、t-BAMBP浓度、萃取相比、洗涤相比等影响因素对铷萃取以及反萃的影响。通过实验获得了适宜的单级萃取、洗涤和反萃的工艺条件:t-BAMBP浓度为1 mol/L,料液碱度为0.6 mol/L,萃取相比O/A=3,萃取时间为2 min;洗水用0.1 mol/L的氯化钠溶液,相比O/A=3,振荡时间为5 min;反萃剂盐酸浓度为1.0 mol/L,反萃相比O/A=5,反萃时间为8 min。以此条件进行9级分馏萃取(3级萃取、6级洗涤),铷萃取率达92.95%,钾100%留在水相中;进行5级逆流反萃,铷反萃率达99.62%。该萃取工艺成功地实现了低浓度铷的高效分离。The process of extracting low concentration Rb from the concentrated solution after the recovery of the sodium salt was investigated by using 4-t-butyl-2（α- methylbenzy） phenol（t-BAMBP） as extractant and sulfonated kerosene as thin- ner.The effects of alkalinity,concentration of t-BAMBP,extraction phase ratio,washing phase ratio,and other related factors on the extraction and back-extraction of Rb were discussed.t-BAMBP＋sulfonated kerosene system of,alkalinity of 0.6 mol/L, extraction phase ratio of 3,extracting time of 2 min,0.1mol/L NaCl solution as washing liquor, washing phase ratio of 3, 5 min washing time, 1.0 mol/L hydrochloric acid solution as stripping agent, back-extraction phase ratio of 5, stripping time of 8 min were determined by experiments.By 9 stages（3 extraction and 6 washing） of fractional extraction and 5 stages of coun-ter-current stripping,the extraction rate and back-extraction rate of Rb were 92.95% and 99.62% respectively,and 100% of K was kept in the aqueous phase.The efficient separation of low concentration rubidium was realized successfully by the extraction process.

关 键 词：t-BAMBP 萃取 反萃 铷 

分 类 号：TQ131.14[化学工程—无机化工]