Investigating the impact of anatase on the dissolution of boehmite
MetadataShow full item record
NOTICE: This is the author’s version of a work that was accepted for publication in Hydrometallurgy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Hydrometallurgy, Vol. 147-148. (2014). http://doi.org/10.1016/j.hydromet.2014.06.002
The dissolution of boehmite in synthetic Bayer liquors is inhibited in the presence of anatase. It has been suggested both by us and others (e.g. Loan et al., 2005) that dissolved titanate adsorbs onto the surface of the boehmite limiting its dissolution. This manuscript reports on digestion, X-ray diffraction (XRD) and transmission electron microscopy (TEM) investigations of boehmite solids partially dissolved in synthetic Bayer liquor in the presence of anatase. Energy filtered transmission electron microscopy (EFTEM) is used to obtain elemental distribution maps, which support the adsorption hypothesis and show enrichment of titanium on the boehmite crystals. Interestingly, the aluminium also becomes associated with some of the Ti-rich particles.
Showing items related by title, author, creator and subject.
The effect of anatase, rutile and sodium titanate on the dissolution of boehmite and gibbsite at 90CDudek, Kamila; Jones, Franca; Radomirovic, Tomoko; Smith, P. (2009)Industrial plants that refine bauxite to alumina using the high temperature process have always held thebelief that anatase was detrimental to the extraction of boehmite while rutile was not. This study shows that this ...
Determination of the structure of y-alumina using empirical and first principle calculations combined with supporting experimentsPaglia, Gianluca (2004)Aluminas have had some form of chemical and industrial use throughout history. For little over a century corundum (α-Al2O3) has been the most widely used and known of the aluminas. The emerging metastable aluminas, including ...
Amiri, Amirpiran (2013)The alumina industry provides the feedstock for aluminium metal production and contributes to around A$6 billion of Australian exports annually. One of the most energy-intensive parts of alumina production, with a strong ...