LEWATIT® S 8227

Summary

Product identification

Lewatit® S 8227 is a food grade, macroporous, weakly acidic cation exchange resin based on a crosslinked polyacrylate. It is bead-shaped and has a special bead size distribution.

Applications

• Decarbonisation and softening of drinking water (in hydrogen form)
• Brewery water treatment
• Household filter systems
• Technical drinking water plants

Properties

Common Description

• Delivery form: H⁺
• Functional group: Carboxylic acid
• Matrix: Crosslinked polyacrylate
• Structure: Macroporous
• Appearance: white, opak

Specified Data

• Uniformity coefficient: max. 1.8
• Range of size for >90 vol% of all beads: 0.4-1.6 mm
• Effective size (d₁₀): 0.46-0.56 mm
• Total capacity (delivery form): min. 4.3 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 770 g/L
• Density: approx. 1.2 g/mL
• Water retention (delivery form): approx. 47-53 weight %
• Volume change (H⁺ - Na⁺): max. approx. 70 %
• 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 at 20°C): 5 %
• Specific pressure loss (at 15°C): 1.1 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

Rinsing

• Regeneration contact time: min. 20 minutes
• Slow rinse: 2 min. BV (at regeneration flow rate)
• Fast rinse: 2 min. BV (at service flow rate)

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

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

Storage

Store under roof in dry conditions above freezing point and without 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.

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