Separation of cadmium and zinc with mixture of di-(2-ethylhexyl)-dithiophosphoric acid and trioctylamine

被引：0
|
作者：
Lu, Lizhu [1 ]
Zhang, Dali [1 ]
Ke, Jiajun [1 ]
Xie, Huiqin [1 ]
机构：
[1] Inst of Chemical Metallurgy, Chinese Acad of Sciences, Beijing, China
来源：
Huagong Xuebao/Journal of Chemical Industry and Engineering (China) | 1998年 / 49卷 / 05期
关键词：
Cadmium; -; Separation; Zinc;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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 CdA2 and ZnA2. Cadmium can be extracted 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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页码：574 / 580
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