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›› 2012, Vol. 12 ›› Issue (3): 415-419.

• 反应与分离 • 上一篇    下一篇

P507与Cyanex272协同萃取分离溶液中钴镍离子

刘美荣 周桂英 温建康   

  1. 北京有色金属研究总院 生物冶金国家工程实验室 北京有色金属研究总院生物冶金国家工程实验室 北京有色金属研究总院生物冶金国家工程实验室
  • 收稿日期:2012-03-12 修回日期:2012-04-19 出版日期:2012-06-20 发布日期:2012-06-20
  • 通讯作者: 周桂英

Separation of Divalent Cobalt and Nickel Ions Using a Synergistic Solvent Extraction System with P507 and Cyanex272

LIU Mei-rong ZHOU Gui-ying WEN Jan-kang   

  1. National Engineering Laboratory of Bio-hydrometallurgy, General Research Institute for Nonferrous Metals National Engineering Lab. of Biohydrometallurgy, General Research Institute for Nonferrous Metals National Engineering Lab. of Biohydrometallurgy, General Research Institute for Nonferrous Metals
  • Received:2012-03-12 Revised:2012-04-19 Online:2012-06-20 Published:2012-06-20
  • Contact: ZHOU Gui-ying

摘要: 采用P507与Cyanex272协同萃取分离回收浸出液中的Ni2+, Co2+,考察了初始pH值、有机相复配比(P/C)和水油相比(A/O)的影响. 结果表明,协萃优化条件为:有机相皂化率50%,皂化时间30 min;有机相组成为10%复配萃取剂[P507:Cyanex272为3:2(j)]+85%磺化煤油+5% TBP;相比为3:1,水相pH值为2.5. 在此条件下,Co2+的一级萃取率为92.96%. 利用200 g/L硫酸反萃负载有机相,在相比2:3、振荡强度225 r/min、时间4 min的条件下,Co2+的反萃率为98.68%,实现了低pH值下Ni2+和Co2+的萃取分离.

关键词: 钴镍分离, P507, Cyanex272, 协同萃取

Abstract: Separation and recovery of divalent nickel and cobalt ions from a bioleaching solution were studied using a synergistic extraction system with P507and Cyanex272. The effects of initial pH value, volumetric ratio of P507 to Cyanex272 (P/C) in organic phase, and ratio of aqueous to organic phase (A/O) on the separation of divalent cobalt and nickel ions were studied. The results showed that the optimal conditions for the separation were: the saponification rate of organic phase 50% and saponification time 30 min, the organic phase composed of 10% [P507:Cyanex272 at 3:2 (volume ratio)], 85% sulphonated kerosene and 5% TBP, A/O 3 to 1 and initial pH value 2.5. In these conditions, the extraction rate of divalent cobalt ion is 92.96%. At the A/O of 2 to 3, turbulence intensity of 225 r/min, time of 4 min, 98.68% of stripping rate of divalent cobalt ion could be obtained with 200 g/L of H2SO4 as the stripping agent, the separation of divalent nickel and cobalt ions was realized under the low initial pH value.

Key words: cobalt-nickel separation, P507, Cyanex272, synergistic extraction

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