L 85 Logvinenko, V. A. Study of dehydration kinetics of heteropoly molybdate and tungstate complexes of gallium(III) / V. A. Logvinenko, G. V. Gavrilova, L. G. Maksimova // Journal of Thermal Analysis. - 1991. - Vol. 37, № 5. - P953-958 : il. - Bibliogr. : p. 957-958 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГЕТЕРОПОЛИСОЕДИНЕНИЯ -- ГЕТЕРОПОЛИМОЛИБДАТЫ -- ГЕТЕРОПОЛИВОЛЬФРАМАТЫ Аннотация: The dehydration processes of heteropoly hexamolybdate and dodecatungstate complexes of gallium were investigated. The kinetics of dehydration were studied in a flow reactor, the obtained activation energy values being 50-107 kJ/mol, and the pre-exponential factor 104- 1013s -1. The nature of the external cation does not influence the dehydration kinetics essentially. The activation energy and pre-exponential factor values increase on transition from the high-hydrated tungstates to the low-hydrated molybdates Полный текст |