Weak base anion exchange resins refer to a type of ion exchange resin with weakly basic groups, such as primary amine groups (also known as primary amine groups) -NH2, secondary amine groups (secondary amine groups) -NHR, or tertiary amine groups (tertiary amine groups) Base)-NR2.

They can dissociate from OH- in water and become weakly alkaline. Due to poor dissociation, this resin can only adsorb other anions in the solution under neutral or acidic conditions (such as pH1-9).

The weakly basic anion exchange resin can be regenerated with Na2CO3 and NH4OH.