LEWATIT® S 8223

Summary

Product identification

Lewatit® S 8223 is a food-grade, macroporous, weakly acidic cation exchange resin based on a crosslinked polyacrylate. It is bead-shaped with a special bead size distribution.

Applications

• Decarbonisation and partial softening of drinking water
• Household filter systems
• Technical drinking water plants

Key Features

• Optimized polymer structure for high operating capacity
• Food grade
• Macroporous structure

Specified Data

• Common Description:
  • Delivery form: H⁺
  • Functional group: Carboxylic acid
  • Matrix: Crosslinked polyacrylate
  • Structure: Macroporous
  • Appearance: white, opaque
• Specified Data:
  • Uniformity coefficient: max. 1.9
  • Range of size for >90 vol% of all beads: 0.315-1.6 mm
  • Effective size (d₁₀): 0.45-0.65 mm
  • Total capacity (delivery form): min. 3.4 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 740 g/L
• Water retention (delivery form): approx. 53-63 % by weight
• Volume change (H⁺ - Na⁺): max. approx. 90 %
• Stability pH range: 0-14
• Stability temperature range: 1-70 °C
• Storage time (after delivery): max. 1 year
• Storage temperature range: -20 to +40 °C

Operation

• Operating temperature: max. 70 °C
• Operating pH range during exhaustion: 5-14
• Bed depth for single column: min. 800 mm
• Backwash bed expansion per m/h (20°C): 5 %
• Specific pressure loss (15°C): 1.3 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Freeboard during backwash: min. 60-80 vol. %

Regeneration

• HCl Regeneration:
  • Concentration: approx. 3-6 wt. %
  • Quantity co-current: min. 120 g/L resin
  • Quantity counter-current: min. 70 g/L resin
• H₂SO₄ Regeneration:
  • Concentration: approx. 0.5 - 0.8 wt. %
  • Quantity co-current: min. 150 g/L resin
  • Quantity counter-current: min. 90 g/L resin
• Regeneration contact time: min. 20 minutes
• Slow rinse at regeneration flow rate: min. 2 BV
• Fast rinse at service flow rate: min. 2 BV

Additional Information & Regulations

• Safety Precautions: Strong oxidants, e.g. nitric acid, can cause violent reactions if they come into contact with ion exchange resins. Observe the Safety Data Sheet.
• Disposal: In the European Community, ion exchange resins must be disposed of according to the European waste nomenclature.
• Storage: Store above the freezing point of water, under roof, in dry conditions without direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use.
• Packaging: Packaging stability is limited to 24 months. Use product within this timeframe or check packaging condition regularly.

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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