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Thermal behavior of Ca2+ and Cu2+ oxalates obtained by precipitation in homogeneous solution from dimethyl oxalate hydrolysis

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Abstract

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.

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Acknowledgements

The author thanks Prof. Jorge Lourenço Rosa (LME-DEMAR/EEL-USP) for SEM images and EDX analysis, and Prof Dr. Edson Cocchieri Botelho (DMT-FEG/UNESP) for TG and DTA analysis.

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Authors and Affiliations

  1. Departamento Engenharia Mecânica, Faculdade de Engenharia de Guaratinguetá, UNESP – Univ Estadual Paulista, São Paulo, Brazil

    Myrian F. Castello & Carolina V. Grupioni

  2. Departamento Física e Química, Faculdade de Engenharia de Guaratinguetá, UNESP – Univ Estadual Paulista, São Paulo, Brazil

    Ronaldo S. Nunes & José Marques Luiz

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  1. Myrian F. Castello
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  2. Carolina V. Grupioni
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  3. Ronaldo S. Nunes
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  4. José Marques Luiz
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Correspondence to José Marques Luiz.

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Castello, M.F., Grupioni, C.V., Nunes, R.S. et al. Thermal behavior of Ca2+ and Cu2+ oxalates obtained by precipitation in homogeneous solution from dimethyl oxalate hydrolysis. J Therm Anal Calorim 117, 1145–1150 (2014). https://doi.org/10.1007/s10973-014-3926-9

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  • DOI: https://doi.org/10.1007/s10973-014-3926-9

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