Simultaneous Recovery of Cerium and Fluorine from Bastnaesite leach liquor by Mixtures of Cyanex 923 and HEH(EHP)

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• 作者：Zhifeng Zhang ; Fuqiang Guo ; Shulan Meng ; Qiong Jia ; Hongfei Li ; Deqian Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：49
• 期：13
• 页码：6184-6188
• 全文大小：162K
• 年卷期：v.49,no.13(July 7, 2010)
• ISSN：1520-5045

文摘

In this paper, studies were carried out on the extraction and recovery of cerium and fluorine by mixtures of Cyanex923 and HEH(EHP) (2-ethylhexylphosphonic mono-2-ethylhexyl ester) from a bastnaesite sulphuric leaching solution. The effects of different variables on the extraction such as the H₂SO₄ concentration in the leaching liquor, saturated loaded extraction, and stoichiometric quantity of H₂O₂ were investigated. Results indicated that the capacity of Ce(III) and F extraction with HEH(EHP) was negligible and Ce(IV) could be strongly extracted by both Cyanex923 and HEH(EHP); on the other hand, CeF₃ had been produced at the stripping stage. Furthermore, appropriate technical parameters of the extraction system have been provided for industry applications and have also been confirmed by multistage countercurrent extraction. On the basis of the above results, the integrated flow of separation and recovery of rare earths from bastnaesite has been provided.