Patent ID: 7297547
Filing Date: 2007-11-20
Classification: B01J,C22B,G01N,Y02P,Y10T

Abstract:
1. A method of neutralizing the matrix of an acidic solution including at least one metal using a weak anion exchange resin, comprising: activating the weak anion exchange resin with a weakly acidic metal complexing reagent, the weakly acidic metal complexing reagent partially disassociating into protons and metal complexing anions, whereby some functional groups in the weak anion exchange resin are protonated and bind with the metal complexing anions; and neutralizing a sample of the acidic solution with the activated weak anion exchange resin, wherein the bound metal complexing anions disassociate with the weak anion exchange resin and bind with the at least one metal, whereby the at least one metal is stabilized in a resulting neutralized sample.