A new inorganic ion exchanger, Antimony (III) Silico Molybdo Tungstate [Sb(III)Si MoW] has been prepared and characterized. The ion exchange capacities, distribution coefficients of 12 metal ions, effect of temperature and electrolyte concentrations on ion exchange capacity have been studied. The exchanger has been characterized by TG, XRD and IR studies. On the basis of difference in distribution coefficients (K_d), binary separations carried out are the separation of Al (III) from Hg (II), Cu (II), Cd (II), Ni (II) and Th (IV). The importance of the exchanger is revealed by checking the formulations of different antacid samples.