Effect of temperature on the extraction of octahedral and tetrahedral cobalt(II) by 8-hydroxyquinoline and/or dibenzo-18-crown-6 or dibenzylamine |
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| Authors: | F A Shehata S I El-Dessouky H F Aly |
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| Institution: | (1) Hot Laboratories Centre, Atomic Energy Authority, 13759 Cairo, Egypt |
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| Abstract: | The extraction behavior of octahedral and tetrahedral cobalt(II) complexes from aqueous nitrate medium was studied in the
system 8-hydroxyquinoline (HOX) and dibenzo-18-crown-6 (Db 18C6) or dibenzylamine (DBA) in chloroform at different temperatures
to evaluate the thermodynamic functions as well as the equilibrium constants of each reaction. The stoichiometry of the extracted
organic phase species were established to be Co(OX)2·Db18C6 for the octahedral cobalt and Co(OX)2·DBA for the tetrahedral cobalt. |
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