Weak Base Anion Resinic for Precious Metal Refining

Weak base Anion Resin is usually a polymer skeleton formed by copolymerization of styrene and divinylbenzene, with weakly alkaline functional groups grafted onto it, such as primary amine group (- NH ₂) or secondary amine group (- NRH). These functional groups carry positive charges in acidic environments and can attract and bind anions in solution. Weak base anion resin has high selectivity for certain precious metal ions (such as Au ³ ⁺, Ag ⁺, Pt ⁴⁺, Pd ² ⁺, etc.) and can preferentially adsorb these ions in complex solutions. Compared to strong base anion resins, weak base anion resins have higher exchange capacity under certain conditions, especially in acidic environments. Weak alkaline anion resin is stable under acidic conditions, not easily degraded, and suitable for use in various chemical environments.