Simulation of Dual Temperature Ion-Exchange Separation Process Taking into Account Complex Formation in Solution
| Autor: | Andrei A. Zagorodni, Nikolai A. Tikhonov |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Ion exchange
Process Chemistry and Technology General Chemical Engineering Inorganic chemistry Kinetics Analytical chemistry Non-equilibrium thermodynamics chemistry.chemical_element Filtration and Separation Fraction (chemistry) General Chemistry Amberlite Copper Separation process chemistry.chemical_compound chemistry Sulfate |
| Zdroj: | Separation Science and Technology. 33:633-653 |
| ISSN: | 1520-5754 0149-6395 |
| DOI: | 10.1080/01496399808544780 |
| Popis: | A mathematical modeling of a dual temperature ion-exchange separation system is reported. The nonlinear nonequilibrium model created takes into account the following physicochemical processes: kinetics, ion-exchange reactions, complex formation accomplishing the chemical equilibria. The model was applied for a system containing Cu2+ and Zn2+ in acidic sulfate solutions and the iminodiacetic ion-exchange resin Amberlite IRC-718. Good agreement to the experimental data was found. The dependence of the separation efficiency on different factors was tested. The advantage of nonequilibrium operations for the effective separation was shown. The optimal separation cycle was calculated for a sulfate solution containing 2.5 mM Cu and 20 mM Zn at pH 2.05. An ion-exchange column can process 207 bed volumes of the treated solution during one cycle. The effluent is separated for three fractions. The first fraction (75 bed volumes) is the solution containing the 9 times reduced Cu concentration. The second one... |
| Databáze: | OpenAIRE |
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