| 摘要 |
PURPOSE:To obtain a fumic acid type adsorbent prevented from the elution of fumic acids into a liquid phase and excellent in adsorbing characteristics, by constituting the same from a reaction substance obtained by bonding fumic acids to a vegetable fiber activated through the addition of epichlorohydrine. CONSTITUTION:The titled adsorbent is constituted of a reaction substance prepared by adding fumic acids such as natural fumic acid or nitrofumic acid to a vegetable fiber activated through the addition of epichlorohydrine. Generally, when fumic acids are added to the vegetable fiber, a spacer such as diamines is introduced to facilitate the stereochemical addition of fumic acids. In addition, as a practicial adsorbent, fumic acid content is pref. adjusted to 10-25%. By this method, the elution of fumic acids into a liquid phase can be prevented and the functional groups possessed by fumic acids are not reduced and a fumic acid type adsorbent having excellent adsorbing characteristics can be obtained.
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