Mass transfer characteristics of cobalt and nickel in di(2-ethylhexyl)Phosphoric acid under steady-state extraction conditions
1985; Elsevier BV; Volume: 14; Issue: 3 Linguagem: Inglês
10.1016/0304-386x(85)90040-4
ISSN1879-1158
Autores Tópico(s)Minerals Flotation and Separation Techniques
ResumoAbstract The mass-transfer characteristics of cobalt and nickel in di(2-ethylhexyl)phosphoric acid have been studied using a gradientless or steady-state stirred cell contactor. The effects of contacting conditions, stirrer Reynolds number, extractant concentration and organic phase loading were investigated. The results showed that under the conditions studied overall transfer rates could be considered diffusion or mass-transfer controlled. There was, however, evidence of an interfacial or chemical resistance as shown by the effect of contacting conditions on values of the overall mass-transfer coefficient, Korg. This was confirmed when experimental Korg values were compared with individual phase mass-transfer coefficient values predicted from correlations proposed in the literature by Lewis and by McManamey et al.
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