| 摘 要： | A new type of crystalline antimonic acid Sb2O5 ·3H2O was synthesized. The composition, crystal structure, the equilibrium distribution coefficients for sodium and potassium ions and the ion-exchange capacity of this exchanger were determined. With this exchanger, sodium ions were removed from potassium chloride, and the content of sodium chloride was reduced from 3.24 % to 0.02% .Compared with other ion-exchange materials, the crystalline antimonic acid gives an unusual selectivity for potassium and sodium ions . The different compositions and properties of antimonic acid exchangers are obtained through different preparing conditions and its crystalline formula of Sb2O5 ·4H2O[2](C-SbA1) is currently accepted. This paper reports a new type of crystalline antimonic acid-Sb2O65·3H2O(C-SbA2), synthesized by an improved Kuzin's method[3]. Sodium ions are removed from potassium chloride with C-SbA2. The exchange efficiency is better than that of C-SbA1.
|
