LEWATIT® S 8229

Summary

Product identification

Lewatit® S 8229 is a food-grade, weakly acidic, macroporous cation exchange resin based on crosslinked polyacrylate. It is bead-shaped with a special bead size distribution.

Applications

• Decarbonisation and softening of drinking water (e.g., brewery water treatment)
• Use in household filter systems
• Use in technical drinking water plants
• Decarbonisation of liquids used as foodstuffs or in foodstuff production

Physical and Chemical Properties

• Ionic form as shipped: H⁺/Na⁺
• Functional group: carboxylic acid
• Matrix: crosslinked polyacrylate
• Structure: macroporous
• Appearance: white, opaque
• Uniformity Coefficient: max. 1.8
• Bead size: > 90 % from 0.4 to 1.6 mm
• Effective size: 0.53 (± 0.05) mm
• Bulk density: 770 (± 5 %) g/l
• Density: approx. 1.18 g/ml
• Water retention: 48 - 56 wt. %
• Total capacity: min. 4.2 eq/l
• Volume change (H⁺ --> Ca²⁺): max. 7 vol. %
• Stability (pH-range): 0 - 14
• Storability: max. 1 year
• Storage temperature range: -20 to 40 °C

Recommended Operating Conditions

• Operating temperature: max. 70 °C
• Operating pH-range: 5 - 14
• Bed depth: min. 800 mm
• Specific pressure drop (15 °C): approx. 1.3 kPa·h/m²
• Pressure drop: max. 250 kPa
• Linear velocity (operation): max. - m/h
• Linear velocity (backwash, 20 °C): approx. 12 - 14 m/h
• Bed expansion (20 °C, per m/h): approx. 5 vol. %
• Freeboard (backwash, external/internal): 60 - 80 vol. %

Regeneration (HCl / H₂SO₄)

• Counter current regeneration level: approx. 70 g/l (HCl) / 90 g/l (H₂SO₄)
• Counter current regeneration concentration: 3 - 6 wt.% (HCl) / 0.5 - 0.8 wt.% (H₂SO₄)
• Co-current regeneration level: approx. 70 g/l (HCl) / 90 g/l (H₂SO₄)
• Co-current regeneration concentration: approx. 3 - 6 wt.% (HCl) / 0.5 - 0.8 wt.% (H₂SO₄)
• Linear velocity (regeneration): approx. 5 - 20 m/h
• Linear velocity (rinsing): approx. 5 - 20 m/h
• Rinse water requirement (slow/fast): approx. 3.5 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 for detailed information on transport, storage, handling, safety, and ecology.

Disposal

In the European Community, ion exchange resins must be disposed of according to the European waste nomenclature.

Storage

Store ion exchange resins above the freezing point of water, in dry conditions, and protected from direct sunlight. Frozen resin should thaw gradually at ambient temperature before handling or use; do not accelerate thawing.

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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