THERMAL TREATMENT ON COMPOSITE -ZIRCONIUM PHOSPHATE-SILICA

摘要: The inorganic ion exchangers had own interest in fifties nuclear industry, because of their extremely good resistance against ionisation radiation. These materials were generally amorphous. Among them the zirconium phosphate (hereafter α-ZrP) favoured interest. Later, 1964 α-ZrP was synthesised crystalline form and its layered structure investigated detail [1]. In following years this material widely by various laboratories. scope these works became clear that are as acid catalyst, especially due to presence P–OH groups on surface [2, 3]. Connection with recognition many researches already been carried out between 1979–2000. greater part mentioned initially restricted amorphous [4, 5], then [6–13]. Relatively little consideration has given γ-zirconium γ-ZrP), other modification phosphate, although it known since 1968 [14]. reason could be chemical formulation elucidated recently [15]. To use catalyst reactions going at a relatively higher temperature there necessary know thermal behaviour. connection item found only few [16–19]. Only Yamanaka et al. reported [20, 21]. One problems using phosphates is low specific area. increase prepared composite SiO2. paper presented data corresponds treatment comparison for γ-ZrP.