Strong Base Anion (SBA) Exchangers

Purolite offers an extensive range of Strong Base Anion (SBA) ion exchange resins based on a polystyrenic or polyacrylic matrix with either gel and macroporous structures. These products include Type I and Type II, as well as mixed base and ion selective functionality. They are supplied in a wide range of grades and ionic forms to optimize performance.

Type I resins have higher silica removal efficiency and are thermally more stable, while Type II have a higher operating capacity. Polystyrenic resins are more rigid and more hydrophobic compared to polyacrylic based resins. Typically, they also have higher thermal stability. These factors should be considered when choosing the proper strong base anion resin since they can affect performance in some applications.

In many cases, Purolite produces equivalent strong base anion products in both gel and macroporous structures. Generally, gel resins have a higher breaking weight and offer higher activity levels (working capacity). Due to their pores, macroporous resins have better resistance to osmotic shock attrition, better access to the active sites and greater resistance to fouling due to the large surface area.

Product	Type	Ionic Form	Total Volume Capacity (min.) (eq/l)	Moisture Retention (%)	Specific Gravity	Reversible Swelling (max. %)	Remarks & Applications
A400	Type I Gel Polystyrenic	Cl⁻	1.3	48−54	1.08	Cl⁻→OH⁻ 30	Used primarily in industrial water treatment in warmer climates due to its higher temperature stability. Offers the best silica removal even in co-flow regenerated plants. Also widely used in mixed beds as A400MB, Purofine PFA400MB or A400TL.
A444	Type I Gel Polystyrenic	Cl⁻	1.0	50−60	1.07	Cl⁻→OH⁻ 30	Alternative high moisture gel anion resin for demineralization. Offers increased resistance to organics.
A600	Type I Gel Polystyrenic	Cl⁻	1.4	43−50	1.09	Cl⁻→OH⁻ 25	Premium grade resin with high total capacity and high breaking weight. Very low silica leakage.
SUPERGEL SGA550	Type I Gel Polystyrenic	Cl⁻	1.4	43−48	1.09	Cl⁻→OH⁻ 24	Uniform particle size Supergel resin with higher resistance to mechanical and osmotic shock. Recommended for condensate polishing and make-up mixed beds, operating in conjunction with Supergel SGC650.
A500Plus	Type I Macroporous Polystyrenic	Cl⁻	1.1	54−65	1.08	Cl⁻→OH⁻ 20	Macroporous version of A400 offering greater resistance to OSA. Mainly used in condensate polishing or make-up mixed beds, where its polymer structure helps in resisting organic fouling.

出典: Purolite Product Guide p.6

Product	Type	Ionic Form	Total Volume Capacity (min.) (eq/l)	Moisture Retention (%)	Specific Gravity	Reversible Swelling (max. %)	Remarks & Applications
A504P	Type I Macroporous Polystyrenic	Cl⁻	1.2	50−60	1.07	Cl⁻→OH⁻ 15	Orthoporous resin able to remove both colloidal and dissolved silica.
A200	Type II Gel Polystyrenic	Cl⁻	1.3	45−51	1.08	Cl⁻→OH⁻ 20	High capacity resin offering good silica removal, primarily used in the production of demineralized and dealkalized water.
A300	Type II Gel Polystyrenic	Cl⁻	1.4	40−47	1.09	Cl⁻→OH⁻ 20	Premium grade high capacity resin offering good silica removal. Primarily used in the production of demineralized and dealkalized water.
A510Plus	Type II Macroporous Polystyrenic	Cl⁻	1.1	50−60	1.08	Cl⁻→OH⁻ 15	Macroporous version of A200 offering better resistance to OSA and organic fouling due to its polymer structure.
A850	Gel Polyacrylic	Cl⁻	1.2	57−62	1.09	Cl⁻→OH⁻ 20	Most widely used resin for the demineralization of high organic bearing waters, offering the best resistance to organic fouling. Higher operating capacity than Type I polystyrenic resins, while still offering very good silica leakage in co-flow and counter-flow regeneration.
A870	Gel Dual Functionality Polyacrylic	Cl⁻/Free Base (Cl⁻ form)	1.25	56−62 (Cl⁻ form)	1.08	Cl⁻→OH⁻ 10	Bifunctional resin combining weak and strong base sites on the same beads, offering the highest operating capacity and excellent resistance to organic fouling. Should not be used where the feed water contains a high weak acid anionic loading (CO₂+SiO₂). Recommended weak acid loading less than 20%.

NOTE: Most of the above products are also available in the OH⁻ form. SBA resins are temperature sensitive. This must be taken into consideration in selecting the correct product. Please consult your local Purolite office.

出典: Purolite Product Guide p.7