Method of preparing metal element adsorbent and method of adsorbing and separating metal element using the same
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United States of America Patent
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Jun 14, 1994
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N/A
app pub date -
Jun 26, 1992
filing date -
Jul 9, 1991
priority date (Note) -
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Abstract
A metal element adsorbent in the form of a hydrogel prepared by treating a condensed tannin with a base, in the presence or absence of an aldehyde so as to avoid precipitation of cross-linked tannin and produce a hydrogel. The inventive adsorbent exhibits high adsorption properties for metal elements and a low flow resistivity when used in a packed column. Methods for use of the inventive adsorbent are disclosed.
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