Ammonia → Zirconium phosphate

Participants

Reaction Conditions

Reaction Steps

80 g of 6% aqueous oxalic acid solution was added to an aqueous solution prepared by dissolving 116.5 g of zirconium oxychloride (ZrOCl2.8H2O) and 2.9 g of ammonium chloride in 183 g of pure water under stirring, and 19 g of 85% phosphoric acid was further added. The reaction mixture was adjusted to pH 3.5 with an aqueous ammonia solution and heated and refluxed at 97° C. for 78 hours. Then, the precipitate was subjected to filtration and washing with water until the electric conductivity EC of the filtrate reached 100 μS/cm or less. The residue was dried at 110° C. for 12 hours and then disintegrated to a given particle size by a disintegrator to obtain zirconium phosphate [(NH4)Zr2 (PO4)3 ] having a network structure.

Provenance & Evidence