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Thermal analysis of hydrotalcite synthesised from aluminate solutions

Frost, Ray L., Palmer, Sara J., & Grand, Laure-Marie (2011) Thermal analysis of hydrotalcite synthesised from aluminate solutions. Journal of Thermal Analysis and Calorimetry, 103(2), pp. 473-478.

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Abstract

The aluminate hydrotalcites are proposed to have either of the following formulas: Mg4Al2(OH)12(CO3 2-)·xH2O or Mg4Al2(OH)12(CO3 2-, SO4 2-)·xH2O. A pure hydrotalcite phase forms when magnesium chloride and aluminate solns. are mixed at a 1:1 volumetric ratio at pH 14. The synthesis of the aluminate hydrotalcites using seawater results in the formation of an impurity phase bayerite. Two decompn. steps have been identified for the aluminate hydrotalcites: (1) removal of interlayer water (230 °C) and (2) simultaneous dehydroxylation and decarbonation (330 °C).

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ID Code: 40011
Item Type: Journal Article
Keywords: hydrotalcite, aluminate, Bayer liquor, spectroscopy, thermal analysis
DOI: 10.1007/s10973-010-1004-5
ISSN: 1388-6150
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Springer
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 11 Feb 2011 08:34
Last Modified: 11 Feb 2011 16:17

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