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Highly selective for multivalent cations including Ca²⁺, Mg²⁺, and heavy metals in low-conductivity water streams.
Superior kinetic performance due to uniform spherical bead morphology and optimized particle size distribution (0.3–1.2 mm).
Excellent chemical and osmotic stability, enabling reliable long-term operation in demanding industrial demineralization cycles.
Low pressure drop characteristics suitable for both fixed-bed and moving-bed ion exchange systems.
Sulfonated polystyrene-divinylbenzene matrix with high total exchange capacity (≥ 2.0 eq/L in Na⁺ form).
Pretreatment of boiler feedwater in power generation plants requiring ultra-low hardness and silica carryover control.
Heavy metal removal from process wastewater in electroplating and metal finishing facilities.
Softening and polishing of ultrapure water (UPW) for semiconductor manufacturing rinse applications.
Cation exchange polishing step in pharmaceutical-grade purified water (PW) and water-for-injection (WFI) systems.
Decalcification of food-grade process streams such as sugar beet juice and dairy effluents.
| Chemical Type | Strongly acidic cation exchanger (sulfonic acid group) |
| Product Form | Na⁺ form (ready-to-use), fully regenerated |
| Appearance | Uniform amber, spherical gel-type beads |
| Particle Size Range | 0.3 – 1.2 mm |
| Moisture Content | 45 – 50 % (as supplied) |
| Total Exchange Capacity (H⁺ form) | ≥ 2.1 eq/L (dry resin) |
| Maximum Operating Temperature | 120 °C |
| pH Stability Range | 0 – 14 |
Q1: What is the primary functional group and ionic form of LEWATIT NM 60 SG?
A: LEWATIT NM 60 SG is a strongly acidic cation exchange resin based on a sulfonated polystyrene-divinylbenzene matrix, supplied in the sodium (Na⁺) form for general water softening and demineralization applications.
Q2: Is this resin suitable for use in pharmaceutical or food-grade water purification systems?
A: Yes — LEWATIT NM 60 SG is manufactured and tested to meet requirements for use in high-purity water production, including pharmaceutical and food processing applications, provided it is properly regenerated and validated according to site-specific quality and regulatory protocols.
Q3: How does NM 60 SG differ from standard gel-type strong acid cation resins?
A: NM 60 SG features a macroporous structure with enhanced physical stability and superior resistance to organic fouling and osmotic shock compared to conventional gel-type resins, making it especially suitable for challenging feedwaters containing oxidants or natural organic matter.
Q4: What regeneration chemicals and typical conditions are recommended?
A: Sodium chloride (NaCl) is the standard regenerant, typically applied at concentrations between 8–12% w/w. Regeneration efficiency depends on flow rate, temperature, and bed depth; optimal performance is achieved under controlled, low-flow conditions consistent with standard ion exchange design practices.
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