Ion adsorbent for metals having a coordination number greater than two
AssigneeGelinnovation Handelsaktiebolag
InventorJerker O. Porath
Life of this patent
Estimating the term…
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.
Claims10
Metal ion adsorbent, characterized in that it is composed of an organic polymer having a hydrophilic character through a content of an average 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 reaches at least 25 mol-percent, the polymer in a non-aqueous state containing at least 10 umol of metal binding groups per gram of adsorbent, and the metal binding group being characterized by five coordinating ligand atoms, two being nitrogen atoms and being carboxylic acid groups, the metal binding group being bound to the polymer as follows:
- ##STR12## wherein X is H or an alkyl group.
Dependencies are inferred from the claim text.