用P507从硫酸镍溶液中萃取分离铜、锌、钴
有色金属科学与工程第9卷第2期
2018年4月Vol.9，No.2 Apr.2018
Nonferrous Metals Science and Engineering 文章编号：1674-9669（2018）02-0019-06
DOI：10.13264/https://www.wendangku.net/doc/7c18986833.html,ki.ysjskx.2018.02.004
硫酸镍是一种重要的工业原料，广泛地应用于化工、轻工、机械、石油、电子及其它工业领域中[1-3].在铜电解精炼过程中，铜电解液中的镍含量会随着电解液的不断循环而富集，当浓度达到一定时采用冷冻结
用P507从硫酸镍溶液中萃取分离铜、锌、钴
邬建辉1，董波1，张献鹏1，叶逢春2，王红军2，
纪宏巍2，郭方颖2，邱士伟2，刘志东2
（1.中南大学冶金与环境学院，长沙410083；2.江西瑞林稀贵金属科技有限公司，江西丰城331100）
摘要：对去除铁、砷、钙、镁后的硫酸镍溶液，采用钠皂化的P507萃取剂分离铜、锌、钴.考察了皂化率、P507体积分数、平衡pH值、相比、时间、温度以及逆流萃取级数对萃取效果的影响.同时考察了负载有机相反萃过程中硫酸浓度、反萃相比、时间对铜、锌、钴反萃效果的影响.结果表明，当萃取有机相组成为35%P507+65%磺化煤油，钠皂化率为65%，相比（V O/V A）为1∶1，平衡pH值为4，25℃，萃取时间为5min，经3级逆流萃取，铜、锌、钴的萃取率分别为96.73%、99.87%、94.17%.对负载有机相经过酸性去离子水（pH=3~4）洗涤后，用1mol/L硫酸溶液，时间为5min，反萃相比（V O/V A）为1∶1.
在此条件下，铜、锌、钴的反萃率分别为99.94%、99.94%、99.86%.
关键词：硫酸镍溶液；P507；溶剂萃取；分离
中图分类号：TF803.23文献标志码：A
Solvent extraction of Cu,Zn,Co from nickel sulphate
solution applying P507
WU Jianhui1,DONG Bo1,ZHANG Xianpeng1,YE Fengchun2,WANG Hongjun2,
JI Hongwei2,GUO Fangying2,QIU Shiwei2,LIU Zhidong2
(1.School of Metallurgy and Environment,Central South University,Changsha410083,China；
2.Jiangxi Nerin Precious Metals Technology Co.,Fengcheng331100,China)
Abstract:Fornickel sulfate solution after the removing of iron,arsenic,calcium and magnesium,sodium-saponified P507extractant was used to separate copper,zinc,cobalt.The effects of saponification efficiency, P507volume fraction,equilibrium pH,phase ratio,time,temperature and countercurrent extraction stage on extraction and separation were investigated.The effects of sulfuric acid concentration,stripping ratio and time on the recovery rate of copper,zinc and cobalt were also investigated.Experimental results showed that,with the extractant of35%P507+65%sulfonated kerosene,the saponification rate of sodium of65%,the phase ratio of1:1,the equilibrium pH of4,the reaction temperature of25℃for5min,the extraction rates of copper, zinc,cobalt after three-stage countercurrent extraction were96.73%,99.87%and94.17%,respectively.The loaded organic phase after extraction was washed with acidic deionized water(pH=3~4)and then stripping with 1mol/L sulfuric acid solution for5min under the stripping ratio（V O/V A）of1:1.Under these reaction conditions,the stripping rates of copper,zinc,and cobalt were99.94%,99.94%and99.86%,respectively. Keywords:nickel sulphate solution;P507;solvent extraction;separation
收稿日期：2017-12-13
基金项目：江西省科技计划资助项目（20152ACE50023）
通信作者：邬建辉（1966-），男，博士，副教授，主要从事难冶有色金属资源的高效利用及特种粉体材料制备方面研究，E-mail:wujianhui218@https://www.wendangku.net/doc/7c18986833.html,.
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