Synthesis, Characterization and Analytical Applications of Tin(IV) Tungstoborate

Abstract

A new inorganic ion exchanger of the class of multivalent metal acid salt, tin(IV) tungstoborate has been synthesized by varying the conditions and characterized based on ion exchange capacity determinations, distribution coefficients for various metal ions, pH titration curves, temperature and electrolyte impact on ion exchange capacity, FTIR spectroscopy, TGA-DTA and XRD studies. The distribution study shows that the exchanger is having selectivity for Pb²⁺, Cu²⁺, Cd²⁺, Zn²⁺, Ni²⁺, Co²⁺, Ca²⁺, Mg²⁺, Al³⁺ and negligible selectivity for Th⁴⁺. It is stable in organic solvents like ethanol, acetone, ether and in dilute mineral acids. Binary separations of Pb²⁺-Th⁴⁺, Cu²⁺-Th⁴⁺, Cd²⁺-Th⁴⁺, Co²⁺-Th⁴⁺, Ni²⁺-Th⁺, Ca²⁺-Th⁴⁺ mixtures were carried out using the exchanger column. Separations of binary mixtures using tin(IV) tungstoborate column found to be 98-100 %.