Crystalline insoluble salts of polybasic metals - III. Preparation and ion exchange properties of cerium(IV) phosphate of various crystallinities

Abstract

The effects of temperature, digestion time, PO4 Ce ratio in solution and order of mixing the reactants on the composition and degree of crystallinity of cerium phosphate are reported. Four different cerium phosphate materials have been obtained; (1) amorphous CeP with PO4 Ce {reversed tilde equals} 1·7, (2) microcrystalline CeP with PO4 Ce = 1·15, (3) microcrystalline CeP with PO4 Ce = 1·55, and (4) fibrous crystalline CeP with PO4 Ce ∼ 2. Preparative procedures and some ion exchange properties of these materials are reported and discussed. Fibrous CeP has been employed for the preparation of inorganic ion exchange papers or membranes containing no binder. © 1968.