LEWATIT® S 8229 DRY

Summary

Product Identification

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

Applications

• Decarbonisation and softening of drinking water
• Brewery water treatment
• Use in household filter systems
• Treatment of liquids used as foodstuffs or in the production of foodstuffs

General Description

• Ionic form as shipped: H⁺/Na⁺
• Functional group: Carboxylic acid
• Matrix: Crosslinked polyacrylate
• Structure: Macroporous
• Appearance: White, opaque

Physical and Chemical Properties

• Uniformity Coefficient: max. 1.8
• Bead size: > 90 % between 0.4 mm and 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 (product): max. 1 year
• Storability (temperature range): -20 °C 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): Not specified
• 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

• Avoid contact with strong oxidants (e.g., nitric acid) as violent reactions may occur.
• Consult the safety data sheet for detailed information on product description, transport, storage, handling, safety, and ecology.

Disposal

• Ion exchange resins must be disposed of according to European waste nomenclature within the European Community.

Storage

• Store above the freezing point of water, under roof, in dry conditions, and out of direct sunlight.
• If frozen, allow to thaw gradually at ambient temperature before handling or use. Do not accelerate thawing.

---

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