LEWATIT® S 5128

Summary

Product identification

Lewatit® S 5128 is a food grade, gelular, strongly basic anion exchange resin (type I) based on an acrylic-divinylbenzene copolymer of a special bead size distribution. It is suitable for the treatment and demineralization of process water used in the food industry and for the removal of organic matter (NOM), especially from surface water.

Operating limits

• Stability pH range: 0-14
• Operating temperature: max. 30 °C
• Operating pH range during exhaustion: 0-12
• Storage temperature range: -20 - +40 °C
• Storage time (after delivery): max. 2 years

Feed water

• Effective adsorption and desorption of naturally occurring organic substances due to its acrylic structure.
• Suitable for removal of organic matters (NOM), especially from surface water.

Product water

• Low silica leakage is required for demineralization applications.

Mechanical / hydraulic

• Common Description:
  • Delivery form: Cl⁻
  • Functional group: Quaternary ammonium type 1
  • Matrix: Acrylic
  • Structure: Gel
  • Appearance: Ivory, opaque
• Specified Data:
  • Uniformity coefficient: max. 1.8
  • Effective size (d₁₀): 0.50-0.75 mm
  • Fines (less than 0.315 mm): max. 0.5 vol %
  • Total capacity (delivery form): min. 1.35 eq/L
• Typical Physical and Chemical Properties:
  • Bulk density for shipment (+/- 5%): 730 g/L
  • Density (approx.): 1.09 g/mL
  • Water retention (delivery form): 48-55 % (weight)
  • Volume change (Cl⁻ - OH⁻): max. 25 %
• Operation:
  • Bed depth for single column: min. 800 mm
  • Backwash bed expansion per m/h (20°C): 10 %
  • Specific pressure loss (15°C): 1.1 kPa*h/m²
  • Max. pressure loss during operation: 150 kPa
  • Specific flow rate: max. 5 BV/h
  • Freeboard during backwash: min. 80-100 vol %
• Regeneration:
  • NaOH regeneration concentration: approx. 2-6 wt. %
  • NaOH regeneration quantity co-current: min. 100 g/L resin
  • NaOH regeneration quantity counter-current: min. 70 g/L resin
  • Regeneration contact time: min. 20 minutes
  • Slow rinse at regeneration flow rate: min. 4 BV
  • Fast rinse at service flow rate: min. 8 BV

Additional Information & Regulations

• Safety precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions with ion exchange resins. Observe the safety data sheet.
• Disposal: Dispose according to European waste nomenclature in the European Community.
• Storage: Store above freezing point of water, in dry conditions, under roof, away from direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use. Do not accelerate thawing.
• Packaging: Packaging stability is limited to 24 months under recommended storage conditions. Use within this timeframe or check packaging condition regularly.

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