23Na and 27Al NMR study of the products from carbonation of a Bayer liquor

Timothy J. Bastow, Peter J. Dirken, Mark E. Smith, Terence W. Turney

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

A multinuclear magnetic resonance methodology combining magic angle spinning, cross-polarisation and double angle rotation has been used to characterise the product from the carbonation of a Bayer liquor as predominantly well ordered NaAlCO3(OH)2 (dawsonite). The NMR spectra are dominated by resonances from this phase, but accurate simulation requires additional minor components, most likely a mixture of a poorly ordered aluminium hydroxide gel and an amorphous phase related to NaHCO3, which is not observed by X-ray diffraction. Thermal decomposition of dawsonite at 350°C proceeds through partial loss of CO2 and OH with concomitant formation of disordered materials containing sodium species, four-, five- and six-fold coordinate Al sites, and two types of residual carbonate.

Original languageEnglish
Pages (from-to)521-525
Number of pages5
JournalJournal of Materials Chemistry
Volume5
Issue number3
DOIs
Publication statusPublished - 1 Jan 1995
Externally publishedYes

Cite this

Bastow, Timothy J. ; Dirken, Peter J. ; Smith, Mark E. ; Turney, Terence W. / 23Na and 27Al NMR study of the products from carbonation of a Bayer liquor. In: Journal of Materials Chemistry. 1995 ; Vol. 5, No. 3. pp. 521-525.
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23Na and 27Al NMR study of the products from carbonation of a Bayer liquor. / Bastow, Timothy J.; Dirken, Peter J.; Smith, Mark E.; Turney, Terence W.

In: Journal of Materials Chemistry, Vol. 5, No. 3, 01.01.1995, p. 521-525.

Research output: Contribution to journalArticleResearchpeer-review

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