LEWATIT® ASB 1 OH

Summary

Product identification

Lewatit® ASB-1 OH is a premium grade, gel, strong base, Type 1, anion exchange resin based on a styrene/DVB polymer. It is supplied in the hydroxide form (OH⁻) and is also available in the chloride form as Lewatit® ASB-1. It is prepared with a high degree of conversion to the hydroxide form and a minimum amount of fines for low pressure losses.

Applications

Lewatit® ASB-1 OH is especially suited for:

• High purity separate bed applications
• Mixed bed applications
• Applications where silica reduction in the final treated water is critical.

Physical and Chemical Properties

• Ionic form as shipped: OH⁻
• Functional group: Quaternary amine
• Matrix: DVB / Styrene
• Structure: Gel
• Appearance: Clear translucent
• Uniformity Coefficient: max. 1.6
• Bead size: 0.3 - 1.25 mm
• Effective size: 0.52 (+/- 0.06) mm
• Bulk density: 655 (+/- 5 %) g/l
• Density: approx. 1.08 g/ml
• Water retention: 55 - 60 wt. %
• Total capacity: min. 1.15 eq/l
• Volume change (Cl⁻ --> OH⁻): max. 20 vol. %
• Stability (pH-range): 0 - 14
• Stability (temperature range): 1 - 60 °C

Storability

• Duration: max. 6 months
• Temperature range: 4 - 24 °C

Recommended Operating Conditions

• Operating temperature: max. 60 °C
• Operating pH-range: 0 - 14
• Bed depth: min. 800 mm
• Pressure drop: max. 200 kPa (200 psi/ft bed)
• Linear velocity (exhaustion): 5 - 25+ m/h
• Bed expansion (backwash at 20 °C): approx. 4 % per m/h
• Freeboard (backwash): 80 - 100 vol. %
• Volumetric flow rate (exhaustion): 8 - 32+ BV/h

Regeneration

• Regenerant type: NaOH
• Regenerant level: approx. 64 - 240 g/l
• Regenerant concentration: approx. 3 - 6 wt. %
• Linear velocity (regeneration): approx. 1 - 10 m/h
• Linear velocity (rinse, slow / fast): 1 - 10 / 12 - 25 m/h
• Volumetric flow rate (regeneration): 1.5 - 4 BV/h
• Volumetric flow rate (rinse, slow / fast): approx. 1.5 - 4 / 8 - 32 BV/h
• Rinse water requirement (slow / fast): approx. 1 - 2.5 / 3 - 8 BV

Additional Information

• Safety: Avoid contact with strong oxidants. Observe the safety data sheet for product description, transport, storage, handling, safety, and ecology.
• Disposal: Dispose of according to the European waste nomenclature.
• Storage: Store above freezing point of water, under roof, in dry conditions, without direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use.

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