Weak Base Anion (WBA) Exchangers

Purolite manufactures gel and macroporous weak base anion resins. Our weak base anion gel products have an acrylic backbone while our weak base anion macroporous products have either an acrylic or styrenic backbone.

Weak base anions are more chemically stable than strong base anions and are used for the removal of mineral acids, organic acids and other organic materials. They are highly resistant to organic fouling. The applications for weak base anion ion exchange resins are extensive — well beyond classic industrial water treatment. Tertiary amine/quaternary ammonium, pure tertiary amine, primary amine and polyamine functionalities are available.

Product	Type	Ionic Form	Total Volume Capacity (min.) (eq/l)	Moisture Retention (%)	Specific Gravity	Reversible Swelling (max. %)	Remarks & Applications
A100Plus	Macroporous Polystyrenic	Free Base	1.3	53−62 (Cl⁻ form)	1.04	Free Base→Cl⁻ 22	Most widely used WBA in IWT due to its good resistance to organic fouling and high operating capacity.
A103Plus	Macroporous Polystyrenic	Free Base	1.5	51−58 (Cl⁻ form)	1.04	Free Base→Cl⁻ 25	S grade used in the food industry for demineralization and decolorization.
A133	Macroporous Polystyrenic	Free Base	1.7	46−54 (Cl⁻ form)	1.04	Free Base→Cl⁻ 25	Suitable for demineralization and decolorization of sugar solutions. Very high capacity WBA resin.
A111	Macroporous Polystyrenic	Free Base	1.7	56−62 (Cl⁻ form)	1.02	Free Base→Cl⁻ 45	High moisture, high capacity WBA resin without any quaternary ion exchange groups. Can offer significant advantages for high organic bearing waters and sweeteners solutions.
A110	Macroporous Polystyrenic	Free Base	2.0	60−66 (Cl⁻ form)	1.05	Free Base→Cl⁻ 50	Special WBA resin with primary amine groups. High capacity. Can be used for the adsorption of CO₂.
A848	Gel Polyacrylic	Free Base	1.4	59−65 (Cl⁻ form)	1.07	Free Base→Cl⁻ 15	First choice acrylic WBA resin for IWT offering higher capacity than polystyrenic resins and good rinse characteristics. Good reversible removal of organics due to more hydrophilic acrylic polymer.
A830	Macroporous Polyacrylic	Free Base	2.75	50−56 (Cl⁻ form)	1.10	Free Base→Cl⁻ 20	Very high exchange capacity polyamine resin.

出典: Purolite Product Guide p.8