| Extraction and Separation of Cadmium and Zinc with a Mixture of Di-(2-Ethylhexyl)- Dithiophosphoric Acid and Trioctyl Amine |
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| 作者姓名： | 卢立柱 张大力 谢慧琴 柯家骏 |
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| 作者单位： | InstituteofChemicalMetallurgy,ChineseAcademyofSciences,Beijing100080,China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.59474009). |
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| 摘 要： | The extractlon of cadmium and zinc with di-(2-ethylbexyi)-dithiophosphoric acid(D2EHDTPA)-toluene and D2EHDTPA-trioctyl amine(TOA)-toiuene has investiated. in-frared spectrum analsis,the nuclear magnetic resonance spectrum(NMR) analysis and conductivity measurements confirm that the probable structures of the extracted complexes are CdA2 and ZnA2, Cadmium can be extracted by D2EHDTPA very eui]y. Almost all the cadmium can be extracted, but stripping of cadmium from the organic phase is very difficult. When a mLxture of D2EHDTPA and TOA is used, selective extraction of cadmium from zinc sulfate solution can be achieved. Cad-mium can be easily stripped from the organic phase.
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| 关 键 词： | 溶剂萃取 分离 镉 锌 混合物 双-（2-乙基已基）-二硫代磷酸 三辛基胺 硫酸锌 |
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Extraction and Separation of Cadmium and Zinc with a Mixture of Di-(2-Ethylhexyl)- Dithiophosphoric Acid and Trioctyl Amine |
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| LU Lizhu,ZHANG Dali,XIE Huiqin,KE Jiajun.Extraction and Separation of Cadmium and Zinc with a Mixture of Di-(2-Ethylhexyl)- Dithiophosphoric Acid and Trioctyl Amine[J].Chinese Journal of Chemical Engineering,1999,7(2):132-138. |
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| Authors: | LU Lizhu ZHANG Dali XIE Huiqin KE Jiajun |
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| Affiliation: | Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The extraction of cadmium and zinc with di-(2-ethylhexyl)-dithiophosphoric acid(D2EHDTPA)-toluene and D2EHDTPA-trioctyl amine(TOA)-toluene has been investigated. Infrared spectrum analysis, the nuclear magnetic resonance spectrum(NMR) analysis and conductivity measurements confirm that the probable structures of the extracted complexes are CdA2 and ZnA2. Cadmium can be extracted by D2EHDTPA very easily. Almost all the cadmium can be extracted, but stripping of cadmium from the organic phase is very difficult. When a mixture of D2EHDTPA and TOA is used, selective extraction of cadmium from zinc sulfate solution can be achieved. Cadmium can be easily stripped from the organic phase. |
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| Keywords: | zinc cadmium solvent extraction thiophosphoric acid |
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