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    The dissolution behaviour of titanium oxide phases in synthetic Bayer liquors at 90 C

    116179_The%20dissolution%20behaviour%20of%20titanium%20oxide.pdf (754.8Kb)
    Access Status
    Open access
    Authors
    Chester, Ryan
    Jones, Franca
    Loan, Mitch
    Oliveira, Allan
    Richmond, William
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Chester, Ryan and Jones, Franca and Loan, Mitch and Oliveira, Allan and Richmond, William. 2009. The dissolution behaviour of titanium oxide phases in synthetic Bayer liquors at 90 C. Hydrometallurgy. 96 (3): pp. 215-222.
    Source Title
    Hydrometallurgy
    DOI
    10.1016/j.hydromet.2008.10.009
    ISSN
    0304386X
    Faculty
    Department of Applied Chemistry
    Science and Engineering
    School
    Nanochemistry Research Institute (Research Institute)
    Remarks

    Copyright © 2009 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/28571
    Collection
    • Curtin Research Publications
    Abstract

    Many of the bauxites currently being processed to alumina contain titanium minerals, yet little fundamental knowledge is available regarding their dissolution behaviour in Bayer liquors. In this paper the dissolution of various titanium oxide phases (anatase, rutile, sodium titanate and calcium titanate) are presented. It is shown that rutile, calcium titanate and sodium titanate have the expected dissolution behaviour, which increases with free caustic concentration. Anatase, too, generally increases in dissolution with free caustic concentration. However, anatase is shown to have an anomalous behaviour when gibbsite co-precipitates. In this case, the dissolution of anatase does not follow the expected free caustic trend. According to the data presented, the most probable cause is an impervious aluminium/sodium titanate surface layer hindering further dissolution.

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