Solid‐liquid extraction behavior of trivalent rare earths by tributyl phosphate at high temperatures

Zhao, Shuang; Yang, Wu; Gao, Jinzhang

doi:10.1002/(sici)1098-2728(1999)11:4<229::aid-lra8>3.0.co;2-#

Cited by 1 publication

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“…In recent years, extraction and separation of rare earth elements have drawn extensive attention. , Many kinds of extraction systems have been investigated and applied to rare earth elements extraction, e.g., acidic organophosphorous extractants, , neutral organophosphorous extractants, , amines, etc. Among these extractants, tributyl phosphate (TBP), di-(2-ethylhexyl)phosphoric acid (D2EHPA), HEH(EHP), , and bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272) , are widely used for the extraction of rare earth elements in industry.…”

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confidence: 99%

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

Zhang

Guo

Meng

et al. 2010

Ind. Eng. Chem. Res.

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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 H 2 SO 4 concentration in the leaching liquor, saturated loaded extraction, and stoichiometric quantity of H 2 O 2 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, CeF 3 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.

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