Patent ID: 6890496
Filing Date: 2005-05-10
Classification: C22B,Y02P

Abstract:
1. A method for selectively extracting one or more metal anion complexes from an aqueous solution, the method comprising: contacting the aqueous solution with an organic solution including a diquaternary amine, wherein the diquaternary amine has two diquaternary nitrogens spaced at a distance of less than about 10 Å, wherein the aqueous solution comprises anion complexes of one or more target metals and anion complexes of one or more other metals; selectively binding the one or more target metal anion complexes to the diquaternary amine; and then separating the organic solution from the aqueous solution, wherein the diquaternary amine having the selectively bound target metal anion complexes are concentrated in the organic solution.