摘要
This work investigated the separation of potassium from sodium in alkaline solution using substituted phenol-based extractants.Superior potassium extraction was achieved with 4-tert-butyl-2-(α-methylbenzyl)phenol(t-BAMBP)than 4-sec-butyl-2-(α-methylbenzyl)phenol(BAMBP).The optimum conditions for the extraction were 1 mol/L t-BAMBP,3:1 volumetric phase ratio(O/A),and two extraction stages.After cross-current extraction,the extraction ratio of potassium reached 90.8%.After scrubbing with deionised water at phase ratio of 4:1 and scrubbing stage of 4,a sodium scrubbing efficiency of 88.2%was obtained.After stripping using 1 mol/L H_(2)SO_(4) at phase ratio of 3:1,the stripping efficiency of potassium reached 94.2%.The potassium/sodium(K/Na)concentration ratio increased 14.3 times from 0.15 in the feed solution to 2.3 in the stripping solution.The efficient separation of potassium from sodium in alkaline solution was achieved via solvent extraction with t-BAMBP.
本文研究了在碱性溶液中用取代酚类萃取剂分离钾和钠。4-叔丁基-2-(α-甲基苄基)苯酚(t-BAMBP)比4-仲丁基-2-(α-甲基苄基)苯酚(BAMBP)具有更好的提钾效果。最佳萃取条件为:1 mol/L t-BAMBP,相比(O/A)3:1,萃取级数两级。通过错流萃取,钾的萃取率达90.8%。用去离子水按4:1的相比进行4级洗涤,钠的洗涤率为88.2%。用1 mol/L H_(2)SO_(4)按3:1的相比反萃,钾的反萃率达94.2%。钾/钠(K/Na)浓度比从料液中的0.15增加到了反萃液中的2.3,增加了14.3倍。使用t-BAMBP进行溶剂萃取,可实现碱液中钾和钠的高效分离。
作者
XING Peng
WANG Cheng-yan
CHEN Yong-qiang
MA Bao-zhong
邢鹏;王成彦;陈永强;马保中(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Metallurgical and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
基金
Projects(52034002,U1802253)supported by the National Natural Science Foundation of China
Project(2019YFC1908401)supported by the National Technology Support Project of China。
