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›› 2003, Vol. 3 ›› Issue (4): 0-0.

• 4 •    

硫代磷酸/伯胺N1923协同萃取锌和镉的机理

张大力,柯家骏,卢立柱   

  1. 1. 北京联合大学生物化学工程学院, 北京 100023;
  • 出版日期:2003-08-20 发布日期:2003-08-20

Mechanism of Extracting Zinc and Cadmium with Thiophosphoric

ZHANG Da-li1, KE Jia-jun2 , LU Li-zhu2   

  1. Col. Chem. and Chem. Eng., Central South University of Technology, Changsha, Hunan 410083, China
  • Online:2003-08-20 Published:2003-08-20

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被引次数

14

摘要： 有机硫代磷酸/伯胺N1923协同萃取锌、镉的萃取率随pH的变化较为反常，可能因伯胺N1923与硫酸作用进而聚为反向胶束. 实验表明，如以(N1923)n.H2SO4表示反向胶束的实验式，N1923与H2SO4比值n多为3左右，可能与空间效应相关. 萃取机理为: M2+(a) +2BHA(o) + (2/n)SO42–(a) = MA2(o) + (2/n)(Bn.H2SO4)(o) + 2(1–2/n)H+(a)， n=3, 4, 5.

关键词: 有机硫代磷酸, 伯胺N1923, 溶剂萃取, 锌, 镉, 反向胶束

Abstract: A new anion-exchange chromatographic method was developed for the separation of cobalt from zinc, cadmium and copper. Experimental results showed that, in a 2 mol/L sodium chloride, 0.1 mol/L sodium sulphite and initial pH 4.5 solution, copper(II) was reduced to copper(I) and pH was decreased to 4.0. As the solution was driven through a 201′7 anion-exchange chromatographic column, zinc, cadmium and copper were effectively separated and the loss of cobalt was about 0.7%. This method is simple, rapid and effective, and has been successfully applied to the separation of cobalt in leach liquor of a zinc plant residue after sulphated calcination.

Key words: thio-substituted organophosphorus acid, primary amine N1923, solvent extraction, zinc, cadmium, reversed micelle

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