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Highly selective chelating resin with iminodiacetate functional groups for preferential binding of heavy metal ions.
Exceptional chemical and osmotic stability across broad pH range (1–12), enabling robust performance in aggressive regeneration environments.
Optimized bead uniformity and mechanical strength to minimize pressure drop and resist attrition in continuous industrial service.
Low sodium leakage and high regeneration efficiency, reducing rinse water consumption and operational costs.
Compliant with FDA 21 CFR §173.25 for indirect food contact applications when properly regenerated and rinsed.
Removal of copper, nickel, zinc, cobalt, and cadmium from electroplating rinse waters and metal finishing effluents.
Recovery of valuable metals from hydrometallurgical leachates and spent catalyst solutions.
Pretreatment of boiler feedwater and ultrapure water systems to eliminate trace transition metals that catalyze corrosion.
Polishing step in pharmaceutical water systems (PW, WFI) to meet stringent USP <731> and EP 2.2.48 metal limits.
Decolorization and metal ion stabilization in sugar refining and organic acid production streams.
| Chemical Type | Chelating cation exchanger (iminodiacetate) |
| Product Form | Moist, spherical beads |
| Appearance | Beige to light brown, translucent beads |
| Functional Group | Iminodiacetic acid |
| Ion Form | Sodium form (Na⁺) |
| Particle Size Range | 0.3 – 1.2 mm (≥95% retained on 0.3 mm sieve) |
| Moisture Content | 45 – 55% (w/w) |
| Temperature Limit | Max. 100 °C (short-term); 60 °C (continuous) |
Q1: What is the primary functional group and ion exchange capacity of LEWATIT NM 3367?
A: LEWATIT NM 3367 is a strongly basic anion exchange resin with quaternary ammonium functional groups (Type I). Its total exchange capacity is typically in the range of 1.2–1.4 mmol/mL (dry), depending on regeneration history and operating conditions.
Q2: Is this resin suitable for pharmaceutical or food-grade applications?
A: LEWATIT NM 3367 is designed for high-purity water treatment and process streams where low leachables and high chemical stability are required. While it meets general industrial purity standards, formal food-contact or pharmaceutical regulatory compliance must be verified case-by-case through end-product testing and relevant documentation from the resin manufacturer.
Q3: How does NM 3367 compare to standard gel-type strong base anion resins in terms of silica removal performance?
A: Due to its macroporous structure and optimized functional group density, NM 3367 offers improved kinetics and higher residual silica capacity—especially in low-conductivity service cycles—compared to conventional gel-type resins, making it well-suited for polishing applications in ultrapure water systems.
Q4: What are the recommended storage conditions to maintain resin integrity before use?
A: Store in original sealed packaging at temperatures between 5 °C and 35 °C, away from direct sunlight and strong oxidants. Avoid freezing; if exposed to sub-zero temperatures, allow gradual warming to room temperature before opening. Keep moist—do not allow the resin to dry out prior to commissioning.
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