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Highly selective for multivalent cations including calcium, magnesium, and heavy metals.
Exceptional chemical and osmotic stability in repeated regeneration cycles.
Optimized spherical bead morphology ensuring low pressure drop and uniform flow distribution.
Low soluble organic carbon (SOC) release, supporting stringent water purity requirements.
Compatible with standard acid and alkali regenerants (e.g., HCl, NaOH, NaCl).
Ultrapure water production for semiconductor manufacturing.
Pharmaceutical-grade water polishing in WFI (Water For Injection) systems.
Removal of trace hardness and heavy metals from process streams in fine chemical synthesis.
Final polishing step in nuclear power plant secondary coolant treatment.
Pretreatment for reverse osmosis and electrodeionization (EDI) systems requiring low ion leakage.
| Chemical Type | Strong acid cation exchange resin (sulfonated polystyrene-divinylbenzene) |
| Product Form | Moist, spherical beads |
| Appearance | Opaque amber to brown beads |
| Functional Group | Sulfonic acid (–SO₃H) |
| Ion Form | Hydrogen form (H⁺) |
| Uniformity Coefficient | ≤ 1.5 |
| Moisture Content | 48 – 52 % (w/w) |
| Maximum Operating Temperature | 120 °C |
Q1: What is the primary functional group and ionic form of LEWATIT K 6367?
A: LEWATIT K 6367 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 monovalent cation removal applications.
Q2: Can LEWATIT K 6367 be used in food-grade or pharmaceutical water treatment systems?
A: Yes — LEWATIT K 6367 is manufactured and tested to meet relevant global regulatory expectations for ion exchange resins used in water purification for food and pharmaceutical applications. It complies with general requirements for extractables and structural integrity under typical operating conditions, though end-use validation remains the responsibility of the system operator.
Q3: How does LEWATIT K 6367 compare to standard gel-type cation resins in terms of selectivity and kinetics?
A: As a macroporous resin, LEWATIT K 6367 offers enhanced kinetic performance and improved resistance to fouling compared to conventional gel-type resins. Its defined pore structure supports more consistent selectivity for Na⁺ over Ca²⁺/Mg²⁺ in high-sodium or organically challenged feedwaters, particularly in dynamic service cycles.
Q4: What regeneration protocol is recommended for optimal long-term performance?
A: Regeneration is typically performed using a sodium chloride (NaCl) brine solution. Standard practice involves 8–12% NaCl concentration at a dosage of 120–250 g NaCl per liter of resin, depending on service cycle length and loading. Slow rinse and proper backwash are essential to maintain bed uniformity and hydraulic efficiency.
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