Abstract
The ion-exchange characteristics of amminated Pt(II) and Pd(II) ions in the synthetic zeolites Na-X, Na-Y and sodium mordenite were measured. Equilibrium studies were conducted at 25°C and at a total solution normality of 0.1 g equiv. dm −3. Highly selective isotherms, exhibiting partial exchange, were observed in all cases. For both the [Pt(NH 3) 4] 2+ and the [Pd(NH 3) 4] 2+ ions, the selectivity sequence was observed to be MOR>Y> X. The results are compared with other recent work on ion-exchange in zeolites involving amminated transition or noble metal ions.
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