Growth and characterization of borax decahydrate by cooling crystallization

Kaneko Shiro, Izumi Hirasawa

    Research output: Contribution to journalArticle

    Abstract

    The cooling crystallization of borax decahydrate has been investigated for the influence of temperatures on solubility, induction period and yield in order to establish the limits of conditions. Crystal morphology of borax decahydrate was studied by optical microscopy. Characterization of the crystals was performed by X-ray diffraction. The solubility curves were determined within the range of 0 to 25°C. The induction period was extremely short in seeded experiments compared with unseeded experiments. The yield was found to increase with decreasing temperatures. Microscopy observation revealed that as-grown crystals were significantly elongated in a direction parallel to the c-axis of the monoclinic system. The X-ray diffraction analysis indicated that the (002) plane of monoclinic system grew faster than the (120) plane at temperatures of 5 and 9°C. The results indicate that the temperature limit of borax decahydrate crystallization is 9°C.

    Original languageEnglish
    Pages (from-to)628-635
    Number of pages8
    JournalJournal of Chemical Engineering of Japan
    Volume44
    Issue number9
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    Sodium borate
    Crystallization
    Cooling
    Crystals
    Solubility
    Temperature
    X ray diffraction analysis
    Optical microscopy
    Microscopic examination
    Experiments
    X ray diffraction
    borax

    Keywords

    • Batch cooling crystallization
    • Borax decahydrate
    • Environmental studies
    • Growth from solutions

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)

    Cite this

    Growth and characterization of borax decahydrate by cooling crystallization. / Shiro, Kaneko; Hirasawa, Izumi.

    In: Journal of Chemical Engineering of Japan, Vol. 44, No. 9, 2011, p. 628-635.

    Research output: Contribution to journalArticle

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