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Highly stable macroporous polystyrene matrix with uniform bead structure for consistent hydraulic performance.
Optimized for selective removal of heavy metal cations, including Cu²⁺, Ni²⁺, and Zn²⁺, even from low-concentration streams.
Excellent chemical resistance to oxidizing agents, acids, and alkalis, enabling robust operation in demanding industrial environments.
Fast kinetics and high exchange capacity due to engineered functionalization with iminodiacetic acid chelating groups.
Low pressure drop and high mechanical strength, supporting long service life and reduced operational downtime.
Electroplating rinse water treatment for heavy metal recovery and wastewater compliance.
Pharmaceutical process water polishing to meet stringent USP/EP conductivity and metal ion limits.
Electronic-grade ultrapure water (UPW) pretreatment for semiconductor manufacturing.
Hydrometallurgical leach solution purification in battery metal recycling operations.
Food and beverage ingredient water softening where trace metal control is critical for product stability.
| Chemical Type | Chelating resin — iminodiacetic acid functionalized macroporous polystyrene-divinylbenzene copolymer |
| Product Form | Moist, spherical beads |
| Appearance | Light yellow to amber, translucent beads |
| Primary Applications | Heavy metal removal, selective cation separation, ultrapure water polishing |
| Key Features | Macroporous structure, high selectivity for transition metals, pH-stable functionality |
| Benefits | Reduced regeneration frequency, minimal leaching, compatibility with automated IX systems |
| Functional Group Capacity (dry basis) | ~2.1 – 2.3 mmol/g |
| Particle Size Range | 0.315 – 1.25 mm (≥95% retained on 0.315 mm sieve) |
Q1: What is the primary functional group and ionic form of LEWATIT K 2420?
A: LEWATIT K 2420 is a strongly basic anion exchange resin with quaternary ammonium functional groups, supplied in the chloride (Cl⁻) ionic form.
Q2: Is LEWATIT K 2420 suitable for food-grade or pharmaceutical water purification applications?
A: Yes — it is commonly selected for high-purity water treatment in food, beverage, and pharmaceutical manufacturing where strict control of anions (e.g., nitrate, sulfate, silica) is required. Users should verify compliance with applicable local regulatory requirements and validate performance under their specific process conditions.
Q3: How does LEWATIT K 2420 compare to gel-type anion resins in terms of selectivity and kinetics?
A: As a macroporous resin, K 2420 offers enhanced kinetic performance and improved resistance to fouling compared to conventional gel-type anion exchangers — particularly in solutions containing organic matter or suspended solids. Its structure supports more consistent ion removal across variable feedwater qualities.
Q4: What regeneration chemicals are typically used for LEWATIT K 2420?
A: Sodium hydroxide (NaOH) is the standard regenerant for restoring the resin’s capacity. Optimal concentration, contact time, and flow rate depend on system design and operational parameters such as service cycle length and influent water quality.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
