Solvent extraction studies of cobalt in aqueous thiocyanate solutions using Aliquat-336 |
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| Authors: | Curtis McDonald Carina M. Alfaro-Franco |
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| Affiliation: | Department of Chemistry, Texas Southern University, Houston, Texas 77004 U.S.A. |
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| Abstract: | Cobalt ions in aqueous thiocyanate solution react with Aliquat-336-xylene solution to form anion-association complex which is easily extracted into the organic phase. A typical extraction procedure involves extracting a solution which is 10 ppm in cobalt and 0.06 M, 5. Stripping of Cobalt from 2% Aliquat-336-Xylene Solutions | Strippant | Cobalt stripped (%) | | Na2S (M) 1.0 | 18.3 | | 2.0 | 10.7 | | Na2SO3 (M) 0.1 | 10.7 | | 0.5 | 49.6 | | 1.0 | 52.9 | | EDA (%) 2.5 | 76.6 | | NaOH (M) 0.1 | 4.1 | | 0.5 | 74.1 | | 1.0 | 90.8 | | 2.0 | 76.8 | | NH4OH (M) 0.1 | 24.1 | | 0.5 | 91.8 | | 1.0 | 97.5 | | 2.0 | 99.9 | | EDTA (M) 0.02 | >99.9 | | 0.05 | >99.9 | | 0.1 | >99.9 | | EDTA (%) 0.1 | >99.9 | | 0.5 | >99.9 | | 1.0 | >99.9 |
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| Keywords: | To whom correspondence should be addressed. |
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