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Highly stable macroporous strong acid cation exchange resin with sulfonic acid functional groups.
Exceptional resistance to oxidation, osmotic shock, and mechanical attrition under demanding industrial service conditions.
Optimized for high-efficiency softening and demineralization in continuous or batch operation modes.
Low sodium leakage and excellent regeneration efficiency with standard acid regenerants (e.g., HCl or H₂SO₄).
Consistent spherical bead morphology ensuring uniform hydraulic flow distribution and minimal pressure drop.
Industrial boiler feedwater pretreatment for steam generation systems.
Pharmaceutical-grade purified water (PW) and water-for-injection (WFI) production support.
Food & beverage processing water softening and dealkalization.
Power plant condensate polishing and high-purity make-up water treatment.
Electronics manufacturing ultrapure water (UPW) primary cation removal stage.
| Chemical Type | Strong Acid Cation (SAC), Macroporous Polystyrene-DVB with Sulfonic Acid Groups |
| Product Form | Moist, spherical beads |
| Appearance | Amber to light brown, uniform spherical beads |
| Functional Group | –SO₃H (Sulfonic acid) |
| Ion Form | H⁺ (Hydrogen form, standard packaging) |
| Particle Size Range | 0.3–1.2 mm (ASTM D2187) |
| Moisture Content | 45–50 % (w/w) |
| Maximum Operating Temperature | 120 °C |
Q1: What is the primary functional group and ionic form of LEWATIT S 7468?
A: LEWATIT S 7468 is a strongly acidic cation exchange resin based on a styrene-divinylbenzene matrix, functionalized with sulfonic acid groups. It is supplied in the sodium (Na⁺) form, enabling efficient removal of multivalent cations such as calcium and magnesium from aqueous streams.
Q2: In which industrial applications is this resin most commonly deployed?
A: LEWATIT S 7468 is widely used for softening and demineralization in high-purity water production, particularly in pharmaceutical, biotechnology, and power generation facilities. Its high selectivity for hardness ions and excellent physical stability make it suitable for continuous-duty service in fixed-bed and moving-bed ion exchange systems.
Q3: How does LEWATIT S 7468 compare to standard gel-type strong acid cation resins in terms of kinetic performance?
A: As a macroporous resin, LEWATIT S 7468 offers significantly improved mass transfer kinetics—especially in solutions containing suspended solids or organic foulants—compared to conventional gel-type resins. Its rigid, porous structure provides enhanced resistance to osmotic shock and better regeneration efficiency under variable operating conditions.
Q4: What are the recommended storage and handling precautions?
A: Store in original sealed packaging at temperatures between 5 °C and 40 °C, away from direct sunlight and strong oxidizing agents. Avoid freezing, as ice formation may damage the bead structure. When handling dry resin, use appropriate PPE to minimize dust inhalation; pre-hydrate before loading into columns to prevent air entrapment and channeling.
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E-mail: wangxingqiang@ericwchem.com
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