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    Effect of Benzoic Acids on Barite and Calcite Precipitation

    19893.pdf (3.594Mb)
    Access Status
    Open access
    Authors
    Freeman, Sandra
    Jones, Franca
    Ogden, Mark
    Oliveira, Allan
    Richmond, William
    Date
    2006
    Type
    Journal Article
    
    Metadata
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    Citation
    Freeman, Sandra and Jones, Franca and Ogden, Mark and Oliveira, Allan and Richmond, William. 2006. Effect of Benzoic Acids on Barite and Calcite Precipitation. Crystal Growth and Design 6 (11): 2579-2587.
    Source Title
    Crystal Growth and Design
    DOI
    10.1021/acs.cgd.7b01391
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    URI
    http://hdl.handle.net/20.500.11937/26814
    Collection
    • Curtin Research Publications
    Abstract

    The effect of various benzoic acids on the precipitation of barite (BaSO4) and calcite (CaCO3) was investigated. The acids varied in the number of carboxylate groups, from dibenzoic acids (phthalic, isophthalic, and terephthalic) through to the hexabenzoic acid (mellitic acid). It was found that the stereochemistry of the dibenzoic acids was important, as was the pH of the solution (trimesic acid was used as a test case and showed that greatest inhibition was achieved with all carboxylate groups deprotonated). Interestingly, for both the calcite and barite systems, mellitic acid was found to be both a potent inhibitor and a significant crystal growth modifier. In the case of barite, the presence of mellitic acid produced nanoparticles that agglomerated. The nanoparticles were found to be 20 nm in size from X-ray diffraction (XRD) line width analysis and 20-50 nm from transmission electron microscopy (TEM). Humic acid was also tested and found to form bundled fibers of barium sulfate.

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