Interfacial resistances in the liquid extraction of inorganic nitrates
| Autor: | W.J. McManamey |
|---|---|
| Rok vydání: | 1961 |
| Předmět: |
Chemistry
Applied Mathematics General Chemical Engineering Butanol Inorganic chemistry Extraction (chemistry) chemistry.chemical_element General Chemistry Chemical reaction Industrial and Manufacturing Engineering Nickel chemistry.chemical_compound Reaction rate constant Mass transfer Phase (matter) Cobalt |
| Zdroj: | Chemical Engineering Science. 15:210-219 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/0009-2509(61)85024-0 |
| Popis: | Studies of the extraction of divalent copper, cobalt and nickel nitrates from water by n -butanol at 25° C in a stirred mass transfer cell showed that the mass transfer process is influenced by an interfacial resistance due to the reaction at the water-solvent phase boundary, in addition to the water and solvent individual phase resistances. This interfacial resistance does not vary with the time of contact of the phases, and the relationships between the interfacial resistance rate constants and the nitrate concentrations at the interface are of the form predicted from the kinetics of the chemical reaction for nitrate extraction. Under the conditions in the transfer cell used the interfacial resistance was between 40 and 60 per cent of the total resistance to mass transfer. Interfacial turbulence was observed during the transfer of all nitrates from n -butanol to water and, as a result the measured mass transfer rates are higher than those predicted from the water and solvent individual phase resistances. The interfacial resistances found for the extraction of cobalt and nickel nitrates by n -butanol from a mixture of these two nitrates in water are of the same order as the values found for the extraction of each individual nitrate. |
| Databáze: | OpenAIRE |
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