Effect of Washing L-Threonine Seed Crystals on Surface Nucleation of D-Threonine

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Surfaces of L-Threonine (L-Thr) seed crystals placed in a supersaturated DL-Thr solution were observed under an optical microscope and an AFM to understand the effect of washing seed crystals with water on the purity drop during preferential crystallization. Similarly to a previous study, thin plate-like crystals of D-Thr were found to appear by the surface nucleation mechanism on the {210} faces of the seed crystals, when they had not been washed. For the case of washing, the {210} faces disappeared, and the {110} and {100} faces appeared in place of the {210} faces, and they grew to recover to form {210} faces. During the recovery, thin D-Thr crystals did not appear, but after the complete recovery were found to exist on the surface. From these observations, surface nucleation as the retardation mechanism of purity drop by the washing of seed crystals was proposed.

収録刊行物

  • Journal of chemical engineering of Japan  

    Journal of chemical engineering of Japan 41(5), 350-353, 2008-05-01 

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10021110203
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    00219592
  • NDL 記事登録ID
    9498234
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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