LEWATIT® S 5221

Summary

Product identification

Lewatit® S 5221 is a food grade, macroporous, weakly basic anion exchange resin based on a crosslinked polyacrylate. It combines good physical stability and excellent resistance to mechanical osmotic shocks with an exceptionally high total capacity.

Product information

• Common Description: Free base
• Delivery form: Yellow, white, opaque beads
• Functional group: Polyamine
• Matrix: Acrylic
• Structure: Macroporous
• Mean bead size (d₅₀): 0.4 - 1.6 mm
• Effective size (d₁₀): 0.50-0.75 mm
• Uniformity coefficient: max. 1.8
• Total capacity (delivery form): min. 2.8 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 740 g/L
• Density (approx.): 1.1 g/mL
• Water retention (delivery form): 52-63 wt.%
• Volume change (free base - Cl⁻): max. 26 %
• Stability pH range: 0-14
• Stability temperature range: 1-60 °C
• Storage time (after delivery): min. 2 years
• Storage temperature range: -20-+40 °C

Operation

• Operating temperature (max.): 60 °C
• Operating pH range during exhaustion: 0-8
• Bed depth for single column (min.): 800 mm
• Backwash bed expansion per m/h (20°C): 17 %
• Specific pressure loss (15°C): 1 kPa*h/m²
• Max. pressure loss during operation: 200 kPa
• Specific flow rate (max.): 5 BV/h
• Freeboard during backwash (min. vol. %): 80-100 %

Regeneration

• NaOH regeneration concentration: approx. 2-5 wt.%
• NaOH regeneration quantity co-current (min.): 160 g/L resin
• NaOH regeneration quantity counter-current (min.): 100 g/L resin
• Regeneration contact time (min.): 30 minutes
• Slow rinse at regeneration flow rate (min.): 2 BV
• Fast rinse at service flow rate (min.): 4 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. The safety data sheet must be observed.
• Disposal: Ion exchange resins must be disposed of according to the European waste nomenclature.
• Storage: Store above freezing point of water, under roof, dry, and out of direct sunlight. If frozen, thaw gradually at ambient temperature before handling or use.
• Packaging: Packaging stability is limited to 24 months under recommended storage conditions. Use product 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