摘要
以磷酸三丁酯为萃取剂,NH4Cl为反萃剂,系统探究了不同萃取环境下萃取和反萃取效果,实验结果表明,在6 mol/L的盐酸体系中,将体积分数为30%的TBP,按1∶1的相比,震荡6 min以萃取25 mg/L的镓溶液,萃取率达98.61%-98.69%,硫酸-氯化钠体系也可实现良好的萃取效果,此外还考虑了其他离子的干扰作用。而在pH=5.5,反萃取剂浓度为2.5 mol/L,反相比为2∶1的条件下,反萃取率可达100%,优化了萃取-反萃取条件,实现了镓的高效回收。
TBP as extraction agent,NH4 Cl as back-extraction agent,effects of extraction and back extraction in different condition was explored. The results show that,in the 6 mol /L hydrochloric acid system,volume fraction of TBP is 30% and phase ratio is 1∶ 1,shocking 6min to extract 25 mg /L solution of gallium,the extraction rate can reach 98. 61% - 98. 69%,sulfuric acid-sodium chloride extraction can also make good results. Besides the interference effect of other ions was considered. In conditions of the pH = 5. 5,anti-concentration extraction was 2. 5mol / L,back-phase ratio was 2∶ 1,back extraction rate can reach 100%. The conditions of extraction-back extraction were optimized,and gallium can be efficiently recovered.
出处
《科学技术与工程》
北大核心
2014年第27期173-176,共4页
Science Technology and Engineering
基金
国家自然科学基金(20777029)
教育部博士点基金(200807100004)
中央高校基本科研业务费专项资金(CHD2011JC094/CHD2012JC063)
国家大学生创新创业训练计划(201310710055)
中央高校基本科研业务费(0009-2014G2290017)资助
关键词
TBP
镓
萃取
反萃取
TBP
gallium
extraction
back-extraction
