Ion adsorbent for metals having a coordination number greater th

Details Ion adsorbent for metals having a coordination number greater th Ion adsorbent for metals having a coordination number greater th

1983-01-27

1983-12-27

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

536 56, 536102, 536112, 521 27, 521 25, B01J 3918

Patent

active

044231580

ABSTRACT:
Metal ion adsorbent that is formed by an organic polymer having a hydrophilic character through a content of an average of at least 0.5 substituents per monomer unit of any of the following types: OH, O, CO, NH.sub.2, NH or N, so that the concentration of these groups is at least 25 mol-percent. The polymer in a non-aqueous state contains at least 10 .mu.mol of metal binding groups per gram of adsorbent. The metal binding group has 5 coordinating ligand atoms, two of which are nitrogen atoms and three of which are carboxylic acid groups.

REFERENCES:
patent: 3899472 (1975-08-01), Aya et al.
patent: 4152493 (1979-05-01), Yotsunoto et al.
patent: 4277566 (1981-07-01), Kataoka et al.
patent: 4343920 (1982-08-01), Kahovec
J. Porath et al., Nature 258 (1975), pp. 598 and 599.
J. Porath, J. Chromatogr. 159 (1978), p. 23.
F. Helfferich, Macmillan Journals Ltd. (1961), pp. 418 to 420.

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