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vol.58 número2PARALLEL DETERMINATION OF DESOGESTREL AND 17α-ETHINYLESTRADIOL IN PHARMACEUTICAL FORMULATION BY DERIVATIVE SPECTROPHOTOMETRYSYNTHESIS AND NMR STRUCTURE DETERMINATION OF NEW LINEAR GERANYLPHENOLS BY DIRECT GERANYLATION OF ACTIVATED PHENOLS índice de autoresíndice de assuntospesquisa de artigos
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Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

BASUALTO, C et al. STUDY OF THE SOLVENT EXTRACTION OF THE LIGHTER LANTHANIDE METAL IONS BY MEANS OF ORGANOPHOSPHORUS EXTRACTANTS. J. Chil. Chem. Soc. [online]. 2013, vol.58, n.2, pp.1785-1789. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072013000200032.

In recent years there has been a great demand for rare earth metals because of their unique physical and chemical properties as new constituents for electronic, optical and magnetic devices. Because oftheir extremely similar chemical and physical properties, it is very difficult to separate them. A study ofsolvent extraction oflighter lanthanide metal ions with a family of organophosphorus extractants, commercially known as D2EPHA, PC88A, CYANEX 272 and CYANEX 301, was made. In general it was found that praseodymium ions were extracted with all the extractants, while in decreasing order neodymium, cerium and lanthanum were extracted less efficiently. Moreover, the D2EHPA and PC88A showed higher extraction efficiencies over the whole pH range used, but they did not allow an effective separation ofREE ions. Furthermore, with CYANEX 301 some degree ofseparation ofthe metal ions was achieved, but the extraction efficiencies were comparatively lower. On the contrary, using the CYANEX 272 extractant, medium efficiencies of extraction were achieved, but with a lower ability to separate the REE ions.

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