SEPARATION OF CADMIUM AND ZINC WITH MIXTURE OF DI-（2-ETHYLHEXYL）-DITHIOPHOSPHORIC ACID AND TRIOCTYLAMINE

Lu Lizhu; Zhang Dali; Ke Jiajun; Xie Huiqin（Institute of Chemical Metallurgy

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SEPARATION OF CADMIUM AND ZINC WITH MIXTURE OF DI-（2-ETHYLHEXYL）-DITHIOPHOSPHORIC ACID AND TRIOCTYLAMINE

更新时间：2025-12-16

- SEPARATION OF CADMIUM AND ZINC WITH MIXTURE OF DI-（2-ETHYLHEXYL）-DITHIOPHOSPHORIC ACID AND TRIOCTYLAMINE
- CIESC Journal Issue 5, (1998)
- 作者机构：
  
  中国科学院化工冶金研究所!北京100080,中国科学院化工冶金研究所!北京100080,中国科学院化工冶金研究所!北京100080,中国科学院化工冶金研究所,北京,100080
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q02
- Online First：25 October 1998，
  
  Published：25 October 1998
- 稿件说明：
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Lu Lizhu, Zhang Dali, Ke Jiajun, et al. SEPARATION OF CADMIUM AND ZINC WITH MIXTURE OF DI-（2-ETHYLHEXYL）-DITHIOPHOSPHORIC ACID AND TRIOCTYLAMINE[J]. CIESC Journal, 1998, (5).
DOI：

Lu Lizhu, Zhang Dali, Ke Jiajun, et al. SEPARATION OF CADMIUM AND ZINC WITH MIXTURE OF DI-（2-ETHYLHEXYL）-DITHIOPHOSPHORIC ACID AND TRIOCTYLAMINE[J]. CIESC Journal, 1998, (5). DOI：

摘要

分别应用二（2-乙基己基）二硫代磷酸（D2EHDTPA）和D2EHDTPA-三辛胺（TOA）协萃体系进行了锌、镉分离的研究。D2EHDTPA萃取锌和镉的等摩尔系列法、红外光谱、核磁共振的测试结果表明，萃合物的组成可能为CdA_2和ZnA_2。应用D2EHDTPA-甲苯体系时，镉容易完全萃取，但有机相中的镉很难反萃下来。应用D2EHDTPA和TOA组成的协萃体系时，镉能从硫酸锌溶液中选择性萃取，也能很容易地从有机相中反萃下来，实现镉与锌的分离。萃取速度的控制步骤是界面反应。

Abstract

The extraction and stripping of cadmium and zinc with di-（2-ethylhexyl)-dithiophosphoric acid（D2EHDTPA）in toluene and by D2EHDTPA-trioctylamine in toluene were investigated.The constant molar extraction

infrared spectrum analysis and nuclear magnetic resonance spectrum analysis confirmed that the probable structures of extracted complexes were CdA_2 and ZnA_2.Cadmium can be extracted very easily by D2EHDTPA.Cadmium is almost completely extracted

but stripping of cadmium from the organic phase is very difficult.With the newly developed synergistic extraction system of D2EHDTPA-TOA

high selectivity for the extraction of cadmium from zinc sulfate solution and easy stripping of cadmium from the organic phase can be obtained.Kinetic study showed that the interfacial reactions were the extraction rate determining steps of the extraction process.

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