LEWATIT® C 249

Summary

Product identification

• Product Name: Lewatit® C 249
• Description: Premium grade, standard cross-linked, gel, strong acid cation exchange resin based on a styrene/DVB polymer.
• Intended Use: Industrial water treatment applications, including demineralization and softening. Can be used in single bed and mixed bed applications.
• Delivery Form: Sodium form.
• Alternative (Hydrogen form): Lewatit® C 267

Specified Data

• Uniformity coefficient: max. 1.6
• Range of size for >90 vol% of all beads: 0.4 - 1.25 mm
• Effective size (d10): 0.50 (+-0.06) mm
• Total capacity (delivery form): min. 2.0 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 830 g/L
• Density (approx.): 1.26 g/mL
• Water retention (delivery form, approx. weight %): 45-48%
• Volume change (Na⁺ - H⁺) (max. approx.): 10%
• Matrix: Styrenic
• Structure: Gel
• Appearance: Brown, black
• Functional group: Sulfonic acid

Operating Limits

• Stability pH range: 0-14
• Operating temperature (max.): 140 °C
• Operating pH range during exhaustion: 2-14
• Bed depth for single column (min.): 800 mm
• Backwash bed expansion per m/h (20°C): 4.5 %
• Specific pressure loss (15°C): 1 kPa*h/m²
• Max. pressure loss during operation: 150 kPa
• Specific flow rate (max.): 50 BV/h

Regeneration

• HCl regeneration concentration (approx. wt. %): 4-6%
• HCl regeneration quantity co-current (min. g/L resin): 100 g/L
• HCl regeneration quantity counter-current (min. g/L resin): 55 g/L
• H₂SO₄ regeneration concentration (approx. wt. %): 1.5-8%
• H₂SO₄ regeneration quantity co-current (min. g/L resin): 120 g/L
• H₂SO₄ regeneration quantity counter-current (min. g/L resin): 80 g/L
• Regeneration contact time (min.): 20 minutes
• Slow rinse at regeneration flow rate (min.): 2 BV
• Fast rinse at service flow rate (min.): 2 BV

Storage

• Storage time (after delivery, max.): 2 years
• Storage temperature range: -20 - +40 °C
• Recommended Storage Conditions: Store under roof in dry conditions without exposure to direct sunlight, at temperatures above the freezing point of water.
• Frozen Resin Handling: Allow to thaw gradually at ambient temperature. Do not mechanically handle while frozen.
• Packaging Stability: Limited to 24 months under recommended storage conditions.

Safety and Disposal

• Safety Precautions: Avoid contact with strong oxidants (e.g., nitric acid) as violent reactions may occur. Consult the Safety Data Sheet for detailed information.
• Disposal: Dispose of according to European Waste Nomenclature within the European Community.

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