LEWATIT® ASB 1

Summary

Product identification

• Product Name: Lewatit® ASB 1
• Product Type: Premium grade, gel, strong base, Type 1, anion exchange resin
• Polymer Base: Styrene / DVB
• Particle Size Distribution: Heterodispersed
• Appearance: Yellow, translucent spherical beads
• Fines Content: Minimum amount, resulting in low pressure losses
• Supplied Form: Fully swollen moist bead form, in chloride (Cl⁻) form
• Alternative Form: Available in hydroxide (OH⁻) form, designated as Lewatit® ASB 1 OH.

Operating limits

• Stability pH range: 0-14
• Operating temperature (max.): 70 °C
• Operating pH range during exhaustion: 0-12
• Maximum pressure loss during operation: 200 kPa

Feed water

• Application Suitability: High purity separate bed, or mixed bed applications where silica reduction is critical.

Product water

• Key Feature: Effective for silica reduction.

Mechanical / hydraulic

• Uniformity coefficient (max.): 1.6
• Range of size for >90 vol% of all beads: 0.3 - 1.25 mm
• Effective size (d₁₀): 0.49 mm (+/- 0.07 mm)
• Bulk density for shipment (+/- 5%): 700 g/L
• Density (approx.): 1.09 g/mL
• Water retention (delivery form) (approx. weight %): 43-48 %
• Volume change (Cl⁻ - OH⁻) (max. approx. %): 20 %
• 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): 11 %
• Specific pressure loss (15°C): 1 kPa*h/m²
• Specific flow rate (max.): 60 BV/h

Chemical properties

• Total capacity (delivery form) (min.): 1.4 eq/L
• Functional group: Quaternary ammonium, Type 1

Regeneration

• NaOH regeneration concentration (approx. wt. %): 2-6 %
• NaOH regeneration quantity co-current (min.): 100 g/L resin
• NaOH regeneration quantity counter-current (min.): 50 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.): 2 BV

Storage

• Storage time (after delivery) (max.): 2 years
• Storage temperature range: -20 - +40 °C
• Recommended storage conditions: Above freezing point of water, under roof, in dry conditions, without direct sunlight.
• Frozen resin handling: Allow to thaw gradually at ambient temperature before handling or use. Do not accelerate thawing.
• Packaging stability: 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