LEWATIT® S 4328

Summary

Product identification

• Product Name: LEWATIT® S 4328
• Edition: 2017-08-10
• Type: Macroporous, heterodisperse, medium basic anion exchange resin
• Base Material: Styrene-divinylbenzene copolymer
• Form: Bead-shaped
• Special Features: Special bead size distribution
• Applications:
  • Lewatit® WS system (fluidized bed)
  • Lewatit® VWS system (compound fluidized bed)
  • Standard co-current regenerated system
  • Removal of acid and simultaneous decolorisation of solutions of organic substances (e.g., sugar, gelatine, glycerin, grape must, whey, fruit concentrates)
  • Potable water treatment
• Functional Group: Tertiary amine / quaternary ammonium
• Matrix: Styrenic
• Structure: Macroporous
• Appearance: Beige, opaque

Operating Limits

• Stability pH Range: 0-14
• Stability Temperature Range: 1-70 °C
• Operating Temperature: Max. 70 °C
• Operating pH Range (during exhaustion): 0-8
• Max. Pressure Loss (during operation): 250 kPa
• Freeboard (during backwash): Min. 80-100 vol. %

Feed Water / Operating Parameters

• Bed depth (single column): Min. 800 mm
• Backwash bed expansion (at 20°C): 17 % per m/h
• Specific flow rate: Max. 5 BV/h

Regeneration

• Regeneration Concentration (NaOH): Approx. 2-4 wt. %
• Regeneration Quantity (NaOH, co-current): Min. 80 g/L resin
• Regeneration Quantity (NaOH, counter-current): Min. 60 g/L resin
• Regeneration Contact Time: Min. 30 minutes
• Slow Rinse: Min. 2 BV (at regeneration flow rate)
• Fast Rinse: Min. 4 BV (at service flow rate)

Physical and Chemical Properties

• Delivery Form: Free base / Cl⁻
• Uniformity Coefficient: Max. 1.6
• Range of Size (>90 vol% of all beads): 0.4-1.25 mm
• Effective Size (d₁₀): 0.50-0.60 mm
• Total Capacity (delivery form): Min. 1.4 eq/L
• Bulk Density (for shipment, +/- 5%): 605 g/L
• Density: Approx. 1.0 g/mL
• Water Retention (delivery form): Approx. 51-58 wt. %
• Volume Change (free base - Cl⁻): Max. approx. 25 %
• Volume Change (during exhaustion): Typical approx. 12 %
• Specific Pressure Loss (at 15°C): 1.1 kPa*h/m²

Storage

• Storage Time (after delivery): Max. 2 years
• Storage Temperature Range: -20 to +40 °C
• Recommended Conditions: Store above freezing point of water, under roof, in dry conditions, without direct sunlight.
• Frozen Resin: Thaw gradually at ambient temperature; do not mechanically handle until completely thawed.

Safety & Disposal

• Safety Precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions with ion exchange resins. Observe the safety data sheet.
• Disposal: According to European waste nomenclature in the European Community.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror