Thermal behavior of Ca2+ and Cu2+ oxalates obtained by precipitation in homogeneous solution from dimethyl oxalate hydrolysis
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Data
2014-09-01
Autores
Castello, Myrian F. [UNESP]
Grupioni, Carolina V. [UNESP]
Nunes, Ronaldo S. [UNESP]
Luiz, Jose Marques [UNESP]
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Editor
Springer
Resumo
Mixed calcium and copper oxalates, with different proportions of Ca2+ and Cu2+ ions, were precipitated by dimethyl oxalate hydrolysis in homogeneous solution. The compounds were evaluated by means of scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetry (TG), and differential thermal analysis (DTA). The results suggested quantitative precipitation without solid solution formation. From the TG and DTA curves, it was possible to evaluate the Ca2+ ion proportion in the solid phase and to confirm the precipitation of the individual species.
Descrição
Palavras-chave
Calcium oxalate, Copper oxalate, Dimethyl oxalate, Thermal analysis
Como citar
Journal Of Thermal Analysis And Calorimetry. Dordrecht: Springer, v. 117, n. 3, p. 1145-1150, 2014.