Polyacrylic Acid-Assisted Crystallization Phenomena of Carbonate Crystals

Hiroto Watamura, Yuko Sonobe, Izumi Hirasawa

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    The effects of polyacrylic acid (PAA) on the crystallization of carbonates were investigated, revealing a great influence of PAA on the shape, size and polymorph type of the carbonate crystals. Carbonate crystallization was performed through reaction crystallization in a single-jet system. The obtained crystals were measured and characterized by scanning electron microscopy and X-ray diffraction. In lithium carbonate, PAA especially influenced the growth phase, inhibited agglomeration and changed the crystal shape into high-aspect rods. In addition, the degree of the growth inhibition effect was molecular weight dependent and the inhibition effect was also different on each face. In calcium carbonate, an improvement of the monodispersity was observed with miniaturization, under particular conditions. Elongated calcite was found under a slow supersaturation rate. In addition, the molecular weight of PAA affected the polymorph selectivity. Therefore, PAA affected the crystallization phenomena of carbonates, and prospected crystals were obtained by changing the operation conditions.

    Original languageEnglish
    Pages (from-to)1422-1426
    Number of pages5
    JournalChemical Engineering and Technology
    Volume37
    Issue number8
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    carbopol 940
    Carbonates
    Crystallization
    Crystals
    Acids
    Calcium Carbonate
    Polymorphism
    Molecular weight
    Lithium Carbonate
    Supersaturation
    Calcite
    Calcium carbonate
    Lithium
    Agglomeration
    X ray diffraction
    Scanning electron microscopy

    Keywords

    • Industrial crystallization
    • Microparticles
    • Polyelectrolyte additive
    • Precipitation

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)
    • Industrial and Manufacturing Engineering

    Cite this

    Polyacrylic Acid-Assisted Crystallization Phenomena of Carbonate Crystals. / Watamura, Hiroto; Sonobe, Yuko; Hirasawa, Izumi.

    In: Chemical Engineering and Technology, Vol. 37, No. 8, 2014, p. 1422-1426.

    Research output: Contribution to journalArticle

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