Cl^-助萃作用下N235萃取脱除铜电解液中锑铋  

Cl^-assisted extraction of antimony and bismuth from copper electrolyte with N235

作　　者：黄茜琳[1] 李亮星[1] 廖春发[2] 黄金堤[1] 童长仁[2] 

机构地区：[1]江西理工大学建筑与资源工程系,江西南昌330013 [2]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《中南大学学报（自然科学版）》2016年第8期2584-2590,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51464012;51104071);江西省教育厅科学技术研究项目(GJJ150649)~~

摘　　要：采用溶剂萃取法脱除铜电解液中的杂质,通过在铜电解液中加入助萃剂研究萃取剂N235对Sb和Bi的萃取性能。考察N235体积分数、助萃剂浓度、有机相与水相的体积比(相比)、萃取时间等因素对Sb和Bi萃取率的影响。研究结果表明:在有机相组成(体积分数)为20%N235+10%异辛醇+70%磺化煤油,助萃剂浓度为0.1 mol/L,相比为1:1时,铜电解液经单级萃取,Sb和Bi的萃取率(质量分数)分别为56.1%和96.6%。在有机相组成和助萃剂浓度保持不变的情况下,相比为2:1时,铜电解液经过7级逆流萃取,Sb的萃取率为86.0%,Bi的萃取率为97.1%。7级逆流萃取平衡有机相经氨水沉淀反萃—水洗—酸化处理后,Sb和Bi总反萃率可达98.4%和96.5%,有机相可循环使用。Antimony and bismuth in copper electrolyte could be efficiently removed by solvent extraction. The performance of extracting antimony and bismuth with N235 was investigated by adding assisting extraction agent into copper electrolyte. The effects of various factors such as volume fraction of N235, concentration of assisting reagent, ratio of organic to aqueous phase（VO/VA） and reaction time were investigated. The results show that the single-stage extraction rates（mass fraction） of Sb and Bi are 56.1% and 96.6% respectively under the conditions that the organic phase composition is 20%N235＋10%isooctanol＋70%sulfonated kerosene, the assisting reagent concentration is 0.1 mol/L and VO/VA is 1：1. The seven-stage counter current extraction rates of Sb and Bi are 86.0% and 97.1% respectively under the conditions that the assisting reagent concentration is 0.1 mol/L and VO/VA is 2：1. The total stripping rates of Sb and Bi are up to 98.4% and 96.5% respectively after the organic phase of seven stages counter current extraction equilibrium is treated with ammonia precipitation stripping, water scrubbing and acid treatment. The organic phase can be recycled.

关 键 词：Cl- 铜电解液 N235 SB BI 

分 类 号：TF111.3[冶金工程—冶金物理化学]