| abstract |
PURPOSE: To concentrate and recover desired ions from a mixture with the other ions, by bringing an original solution into contact with a specific compound to form a complex, and after separation of the original solution bringing the complex into contact with a specific receiving solution. n CONSTITUTION: An original solution is brought into contact with a compound of formula (A) [Spacer is C 1-10 hydrophilic group; A is N, NH or the like; B, D, G and L are respectively NR x or (substituted) 2-pyridyl group (x is 1 when NR is pyridine ligand); a, c, g, h are 1-5; e, j are 0-5; k is 0-1; X', Y', Z' are respectively Cl, Br or the like], comprising a pyridine-containing ligand covalently bonded to a solid inorganic support, to form a complex, then the original solution is separated, the complex is brought into contact with a receiving solution (B) having a greater affinity to the metal ions than the component (A), thereby the complex is decomposed, and the desired metal ions concentrated in the component (B) are recovered. n COPYRIGHT: (C)1991,JPO |