MECHANISM OF COMPETITIVE REACTION IN ANTAGONISTIC EXTRACTION OF CADMIUM AND ZINC WITH DI(2-ETHYLHEXYL) DITHIOPHOSPHORIC ACID-DIOCTYLAMINE

ZHANG Dali; KE Jiajun; LU Lizhu

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MECHANISM OF COMPETITIVE REACTION IN ANTAGONISTIC EXTRACTION OF CADMIUM AND ZINC WITH DI(2-ETHYLHEXYL) DITHIOPHOSPHORIC ACID-DIOCTYLAMINE

更新时间：2025-12-10

- MECHANISM OF COMPETITIVE REACTION IN ANTAGONISTIC EXTRACTION OF CADMIUM AND ZINC WITH DI(2-ETHYLHEXYL) DITHIOPHOSPHORIC ACID-DIOCTYLAMINE
- CIESC Journal Issue 2, (2002)
- 作者机构：
  
  1. 北京联合大学化学工程学院
  2. 中国科学院过程工程研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 February 2002，
  
  Published：25 February 2002
- 稿件说明：
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ZHANG Dali, KE Jiajun, LU Lizhu. MECHANISM OF COMPETITIVE REACTION IN ANTAGONISTIC EXTRACTION OF CADMIUM AND ZINC WITH DI(2-ETHYLHEXYL) DITHIOPHOSPHORIC ACID-DIOCTYLAMINE[J]. CIESC Journal, 2002, (2).
DOI：

ZHANG Dali, KE Jiajun, LU Lizhu. MECHANISM OF COMPETITIVE REACTION IN ANTAGONISTIC EXTRACTION OF CADMIUM AND ZINC WITH DI(2-ETHYLHEXYL) DITHIOPHOSPHORIC ACID-DIOCTYLAMINE[J]. CIESC Journal, 2002, (2). DOI：

摘要

研究了二 (2 -乙基己基 )二硫代磷酸 -二辛胺协同萃取剂萃取镉锌的竞争反应机理 .根据协萃图

该混合体系萃取镉锌均为反协萃效应 .等摩尔系列法和饱和法的实验结果表明镉和锌的萃合物为CdA2 和ZnA2 .萃取机理可归结为 3个反应

计算结果表明它们对萃取的贡献随水相酸性而变化

由此可解释萃镉的U型曲线 .该类协萃体系在中浸液酸度下的镉锌分离性能及镉的反萃性能显著优于有机二硫代磷萃取剂

Abstract

The antagonistic extractions of cadmium and zinc with di(2-ethlhexyl)dithiophosphoric acid (D2EHDTPA)-dioctylamine (DOA) were investigated. The diagram of synergistic extraction showed that the extraction of cadmium and zinc are antagonistic.The extracted complexes were CdA 2 and ZnA 2.There were three reactions in the extraction

their contributions to the extraction changed with pH

and the U shaped curve of lg D -pH in the extraction of cadmium could be explained with the three reactions.

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