English
Español
tiếng việt
русский
High-capacity strong acid cation exchange resin based on sulfonated polystyrene-divinylbenzene matrix.
Optimized for high selectivity and efficient removal of multivalent cations (e.g., Ca²⁺, Mg²⁺, Fe³⁺) in softening and demineralization applications.
Excellent physical and chemical stability across wide pH range (0–14) and resistant to osmotic shock during regeneration cycles.
Uniform spherical bead morphology ensures low pressure drop and consistent hydraulic performance in fixed-bed systems.
Regenerable with standard sodium chloride or acid solutions, supporting sustainable operation and reduced operational costs.
Industrial water softening for boiler feedwater and cooling tower makeup.
Pretreatment in reverse osmosis (RO) and mixed-bed polishing systems.
Removal of hardness ions and heavy metals from process water in food & beverage production.
Cation exchange in pharmaceutical-grade purified water (PW) and water-for-injection (WFI) systems.
Effluent treatment for metal recovery and wastewater conditioning in electroplating and metal finishing industries.
| Chemical Type | Strongly acidic cation exchanger (sulfonic acid group) |
| Product Form | Moist, spherical beads |
| Appearance | Opaque amber to brown beads |
| Functional Group | –SO₃H |
| Matrix Structure | Polystyrene crosslinked with divinylbenzene (DVB) |
| Ion Form | Sodium form (Na⁺) |
| Moisture Content | Approx. 46–50% (w/w) |
| Particle Size Range | 0.315–1.25 mm (95% retained between sieves) |
Q1: What is the primary functional group and ionic form of LEWATIT S 5528?
A: LEWATIT S 5528 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, making it suitable for softening and selective cation removal applications.
Q2: Can LEWATIT S 5528 be used in food-grade or pharmaceutical water treatment systems?
A: Yes — LEWATIT S 5528 is manufactured and tested to meet requirements for use in potable water and process water applications where regulatory compliance for indirect food contact is required. Its suitability for specific food or pharma applications depends on system validation, regeneration protocols, and local regulatory assessment.
Q3: How does LEWATIT S 5528 compare to standard gel-type strong acid cation resins in terms of kinetics and capacity?
A: As a macroporous resin, LEWATIT S 5528 offers improved kinetic performance and greater resistance to fouling compared to conventional gel-type resins, especially in waters containing organic matter or suspended solids. Its total exchange capacity is slightly lower than high-capacity gel resins, but its operational stability under challenging feed conditions is enhanced.
Q4: What regeneration chemicals and typical dosage ranges are recommended for LEWATIT S 5528?
A: Sodium chloride (NaCl) is the standard regenerant for softening service. Regeneration efficiency depends on flow rate, concentration, and contact time — typical NaCl dosage ranges from 60 to 150 g/L of resin volume. Acid (e.g., HCl or H₂SO₄) may be used for full H⁺ form conversion when needed for demineralization duty.
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
