Abstract
Abstract Various samples of tin(IV) boratomolybdate, tin(IV) boratotungstate, tin(IV) boratophosphate, tin(IV) arsenatoborate and tin(IV) boratosulfate has been synthesized by mixing aqueous solutions of appropriate reagents in different volume ratios at pH=1. One of the samples of tin(IV) boratomolybdate has been studied in greater detail for its ion-exchange capacity, thermal and chemical stability, pH-titration and chemical composition. A comparison of few properties of tin(IV) boratomolybdate has been made with other tin(IV) salts of different heteropolyanions. Distribution coefficients of 24 metal ions on tin(IV) boratomolybdate in water, nitric acid, water–dioxane, and nitric acid–dioxane systems have been determined. The effect of temperature on the sorption behaviour of metal ions has also been studied. It has been found that Kd value increases in general with the increase in temperature. The differential selectivity of metal ions on tin(IV) boratomolybdate reveals that tin(IV) boratomolybdate is a useful ion exchanger for the separation of metal ions. As a result ten important separations have been quantitatively achieved on the columns of this ion-exchange material.
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