LEWATIT® S 8528

Summary

Product identification

Lewatit® S 8528 is a food-grade, macroporous, weakly acidic cation exchange resin based on a crosslinked polyacrylate. It has a special bead size distribution.

Applications

• Standard co-current regenerated system
• Standard mixed bed system
• Applications in the food industry and for drinking water production

The resin is suitable for the decationisation and softening of tap water, sugar solutions, and solutions of organic products (e.g., sugar beet, sugar cane, starch sugar, glycerin, gelatine). It is particularly economical for the decarbonisation of drinking water and liquids used as foodstuffs or in their production due to its low regenerant requirement.

Product Information

• Common Description: Lewatit® S 8528
• Delivery form: H⁺ (Hydrogen form)
• Functional group: Carboxylic acid
• Matrix: Crosslinked polyacrylate
• Structure: Macroporous
• Appearance: Yellow, opaque

Specified Data

• Uniformity coefficient: max. 1.8
• Range of size for >90 vol% of all beads: 0.4-1.6 mm
• Effective size (d₁₀): 0.48-0.58 mm
• Total capacity (delivery form): min. 4.3 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 750 g/L
• Density: approx. 1.2 g/mL
• Water retention (delivery form): approx. 43-48 wt%
• Volume change (H⁺ ↔ Na⁺): max. approx. 70%
• Stability pH range: 0-14
• Stability temperature range: 1-70 °C
• Storage time (after delivery): max. 0.5 years
• Storage temperature range: -20 - +40 °C

Operation

• Operating temperature: max. 75 °C
• Operating temperature (without oxygen): max. 95 °C
• Operating pH range during exhaustion: 5-14
• Bed depth for single column: min. 800 mm
• Bed depth per component in mixed bed: min. 500 mm
• Backwash bed expansion per m/h (20°C): 4%
• Specific pressure loss (15°C): 1.1 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate: max. 5 BV/h
• Freeboard during backwash: min. 60-80 vol%

Regeneration

• HCl regeneration concentration: approx. 3-6 wt%
• HCl regeneration quantity co-current: min. 120 g/L resin
• H₂SO₄ regeneration concentration: approx. 0.5 - 0.8 wt%
• H₂SO₄ regeneration quantity co-current: min. 150 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. 4 BV

Additional Information & Regulations

• Safety precautions: Strong oxidants, e.g., nitric acid, can cause violent reactions. Observe the safety data sheet.
• Disposal: Dispose of according to the European waste nomenclature.
• Storage: Store above freezing point, under roof, dry, and out of direct sunlight. If frozen, allow to 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.

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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