Extracción del cinc y otros metales minoritarios de soluciones concentradas de cloruro amónico con D2EHPA y Cyanex 272

S. Amer; A. Luis

doi:10.3989/revmetalm.1995.v31.i6.933

The extraction of zinc and other minor metals from concentrated ammonium chloride solutions with D2EHPA and Cyanex 272

Authors

S. Amer Centro Nacional de Investigaciones Metalúrgicas. (CSIC)
A. Luis Centro Nacional de Investigaciones Metalúrgicas. (CSIC)

DOI:

https://doi.org/10.3989/revmetalm.1995.v31.i6.933

Keywords:

Zinc, Bis(-2-ethylhexil) phosphoric acid, Cyanex 272, Solvent extraction, Concentrated ammonium chloride solutions

Abstract

A comparative study is made of the extractants D2EHPA and Cyanex 272 for the zinc and minor metal extraction from aqueous concentrated ammonium chloride solutions, as those of the leaching liquors of the CENIM-LNETI process. Extraction equilibrium data for zinc are presented as extraction isotherms at constant pH and at a temperature of 50 °C. Zinc extraction and coextraction of minor metal ions as Cu, Ca, Pb, Mg, Cd, Co, Ni and Hg are studied. Mercury does not extract from concentrated ammonium chloride solutions. Cyanex 272 shows a better selectivity for zinc with regard to the minor metals than D2EHPA, which is especially remarkable for calcium, the most coextracted element by D2EHPA. Nickel and cadmium coextraction is negligible for both extractants. The possible use of the Cyanex 272 as an alternative to D2EHPA is considered.

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Published

1995-12-30

How to Cite

Amer, S., & Luis, A. (1995). The extraction of zinc and other minor metals from concentrated ammonium chloride solutions with D2EHPA and Cyanex 272. Revista De Metalurgia, 31(6), 351–360. https://doi.org/10.3989/revmetalm.1995.v31.i6.933

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Issue

Vol. 31 No. 6 (1995)

Section

Articles

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