CJCU

Chem. J. Chinese Universities ›› 1980, Vol. 1 ›› Issue (2): 14.

• Articles • Previous Articles     Next Articles

STRUCTURAL CHANGE DURING THE SAPONIFICATION OF ORGANOPHOSPHORIC ACID EXTRACTANTS AND THE COMPOSITION OF THE EXTRACTED SPECIES

Wu Jinguang, Chen Dian, Gao Hongcheng, Jin Tianzhu, Li Shengchong, Xu Guangxian   

  1. Department of Chemistry, Beijing University
  • Received:1980-02-11 Online:1980-12-24 Published:1980-12-24

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Abstract: The change of structure during the saponification of D2EHPA and other organophosphoric acid extractants has been studied.It was found that the saponification is a process of the formation of a microemulsion of water-in-oil type,while the extraction of rare earth ions is a process of ion exchange in the water-oil interface forming a metal chelate,thus destroying the microemulsion.When 100% saponified D2EHPA was used to extract divalent metal ions,we obtained extracted species of composition MA2,instead of M(HA2)2,thus doubling the extraction capacity of D2EHPA.

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