Gibbsite to boehmite transformation in strongly caustic and nitrate environments

Xiaoyi Gong, Zimin Nie, Maoxu Qian, Jun Liu, Larry A. Pederson, David T. Hobbs, Norton G. McDuffie

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The transformation of gibbsite to boehmite in strongly caustic solutions was studied using quantitative X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy techniques. Under hydrothermal conditions, we identified two transformation mechanisms: (1) dehydration and in situ nucleation and (2) dissolution and nucleation. If the reaction container was not completely sealed, dehydration of gibbsite followed by in situ nucleation of boehmite was the preferred mechanism. Boehmite produced fibrous boehmite particles within the amorphous matrix of the decomposed gibbsite particles, which exhibited a poorly crystalline structure and a smaller size than the initial gibbsite particles. In a closed environment, the preferred mechanism was the dissolution of gibbsite along (001) planes. The final boehmite particles were not morphologically related to the initial gibbsite particles and could be many times larger than the gibbsite particles.

Original languageEnglish
Pages (from-to)2163-2170
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume42
Issue number10
Publication statusPublished - 14 May 2003
Externally publishedYes

Fingerprint

boehmite
Caustics
gibbsite
Nitrates
Nucleation
nitrate
Dehydration
Dissolution
Infrared transmission
nucleation
Fourier transform infrared spectroscopy
Containers
dehydration
Crystalline materials
Transmission electron microscopy
X ray diffraction
dissolution
aluminum oxide hydroxide
FTIR spectroscopy
particle

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Gong, X., Nie, Z., Qian, M., Liu, J., Pederson, L. A., Hobbs, D. T., & McDuffie, N. G. (2003). Gibbsite to boehmite transformation in strongly caustic and nitrate environments. Industrial and Engineering Chemistry Research, 42(10), 2163-2170.

Gibbsite to boehmite transformation in strongly caustic and nitrate environments. / Gong, Xiaoyi; Nie, Zimin; Qian, Maoxu; Liu, Jun; Pederson, Larry A.; Hobbs, David T.; McDuffie, Norton G.

In: Industrial and Engineering Chemistry Research, Vol. 42, No. 10, 14.05.2003, p. 2163-2170.

Research output: Contribution to journalArticle

Gong, X, Nie, Z, Qian, M, Liu, J, Pederson, LA, Hobbs, DT & McDuffie, NG 2003, 'Gibbsite to boehmite transformation in strongly caustic and nitrate environments', Industrial and Engineering Chemistry Research, vol. 42, no. 10, pp. 2163-2170.
Gong X, Nie Z, Qian M, Liu J, Pederson LA, Hobbs DT et al. Gibbsite to boehmite transformation in strongly caustic and nitrate environments. Industrial and Engineering Chemistry Research. 2003 May 14;42(10):2163-2170.
Gong, Xiaoyi ; Nie, Zimin ; Qian, Maoxu ; Liu, Jun ; Pederson, Larry A. ; Hobbs, David T. ; McDuffie, Norton G. / Gibbsite to boehmite transformation in strongly caustic and nitrate environments. In: Industrial and Engineering Chemistry Research. 2003 ; Vol. 42, No. 10. pp. 2163-2170.
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