| Summary: | 碩士 === 國立成功大學 === 資源工程學系 === 103 === Catalysts are widely used in petroleum refining and chemical industries. Among all the secondary resources, spent catalysts are undoubtedly much important because of not only their large amount and economic values, but also the environmental concerns if not disposed properly.
Separation of molybdenum, vanadium, and nickel in sulfuric acid leachate containing 0.3 g/L Mo, 1.8 g/L V and 0.5 g/L Ni was performed using ion exchange in this study. Loading behavior of the those three metals from moderate to strong acid solution was investigated using anion (IRA900_Cl) and chelating resins (IRC748 and M4195). The loading capacity of IRA900_Cl for Mo from sulfuric acid solution at pH 0.49 was 139.32 mg/ml; the loading capacity of IRA900_Cl for V anions from sulfuric acid solution at pH1.8 was 147.98 mg/ml; the loading capacity of IRC748 for V cations from sulfuric acid solution at pH 2.1 was 8.44 mg/ml; the loading capacity of M4195 of Ni from sulfuric acid solution at pH2.1 was 40.83 mg/ml. The Mo ions in the loaded resin was eluted by 3M NaOH solution; the V anions and V cations in the loaded resin were eluted by 6N H2SO4 and 3N HCl solution respectively; the Ni ions in the loaded resin was eluted by 3N HCl. Finally, adding HNO3 into the eluted solution containing Mo, MoO3 product was precipitated; adding NH4OH into the eluted solution containing of V, V2O5 product was precipitated.
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