Crystallization of β-Sitosterol Using a Water-Immiscible Solvent Hexane

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Cooling crystallization of <I>β</I>-sitosterol that is a kind of phytosterol was carried out, where a water-immiscible solvent hexane containing a ppm level of water was used as a solvent. The initial ratio of water and <I>β</I>-sitosterol concentration adopted in this work was 330/10, 1315/10 and 645/20 ppm/(g/L), which corresponded to 0.51, 2.0, and 0.50 in water/<I>β</I>-sitosterol mole ratio, respectively. When the initial ratio of water and <I>β</I>-sitosterol concentration was 1315/10 ppm/(g/L), thin plate-like crystals were precipitated and were identified as the monohydrate crystals of <I>β</I>-sitosterol. On the other hand, when the initial ratio of water and <I>β</I>-sitosterol concentration was 645/20 ppm/(g/L), needle-like crystals of hemihydrate were precipitated. This result meant that the ppm level of water plays an important role for the pseudo-polymorphism. Since the crystal structure of <I>β</I>-sitosterol hemihydrate had never been reported, we determined it by a single crystal XRD analysis.

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  • Journal of chemical engineering of Japan  

    Journal of chemical engineering of Japan 39(8), 869-875, 2006-08-01 

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10018206234
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    8018115
  • 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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