A review of the development of the synthetic inorganic ion exchangers during the 1970–1976 period has been made. Synthesis, properties, and analytical applications of the hydrated oxides, acidic salts of multivalent metals, heteropolyacid salts, and synthetic zeolite-type materials that are used as ion-exchangers have been included in the survey. Only the more important contributions during the 1970–1976 period are included

Synthetic Inorganic Ion-Exchangers

Synthetic inorganic ion-exchange materials—XXIII

Synthetic inorganic ion-exchange materials—XXV: Change in the ion-exchange selectivity by thermal treatment of crystalline antimonic(V) acid toward alkali metal ions

Synthetic inorganic ion-exchange materials—XXIX Ion-exchange equilibria of crystalline antimonic(V) acid with organic cations

The electrophoretic behavior of 19 metal ions on thorium phosphate papers is described. Seven background electrolytes were used for these studies to allow different time intervals. On the basis of the differential mobilities of the metal ions, which depend on the ion exchange properties of thorium phosphate and the nature of the complexes formed with the electrolyte, some important binary, ternary, and quaternary separations have been achieved.

Studies on synthetic inorganic ion exchangers. IV. Electrophoretic behavior of metal ions on thorium phosphate papers

Zirconium phosphate is perhaps the first insoluble salt of a polybasic metal to be used as an ion exchanger. It is the most studied and probably the most useful of all the materials of this type. These materials are prepared by combining oxides of group IV with the more acidic oxides of groups V and VI of the periodic table, as shown in Table 1.

J. P. Gupta

Papers

Recent progress in ion-exchange studies on insoluble salts of polybasic metals.