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

Authors
  • Castello, Myrian F.
  • Grupioni, Carolina V.
  • Nunes, Ronaldo S.
  • Luiz, Jose Marques
Publication Date
Sep 01, 2014
Source
Repositório Institucional UNESP
Keywords
Language
English
License
Unknown
External links

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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