LEWATIT® A 8071

Summary

Product identification

Lewatit® A 8071 is a strongly basic, gelular anion exchange resin (type I) based on an acrylic-divinylbenzene copolymer of special bead size distribution. It is particularly effective for the adsorption and desorption of naturally occurring organic substances.

Common Description

• Delivery form: Cl⁻
• Functional group: quaternary ammonium, type 1
• Matrix: acrylic
• Structure: gel
• Appearance: ivory, opaque

Specified Data

• Uniformity coefficient: max. 1.8
• Effective size (d10): 0.50 - 0.75 mm
• Total capacity (delivery form): min. 1.35 eq/L

Applications

Lewatit® A 8071 is especially suitable for:

• Demineralizing water for industrial steam generation using co- or counter-current systems (e.g., Lewatit® Liftbed System or Lewatit® Rinsebed System).
• The removal of organic matter, especially from surface water.
• Extending the lifetime of acid baths in the finishing industry (acid retardation process).

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 740 g/L
• Density: approx. 1.09 g/mL
• Water retention (delivery form): approx. 48-55 % by weight
• Volume change (Cl⁻ to OH⁻): max. approx. 25 %
• Stability pH range: 0-14
• Storage time (after delivery): max. 2 years
• Storage temperature range: -20 to +40 °C

Operating Conditions

• Operating temperature: max. 35 °C
• Operating pH range during exhaustion: 0-12
• Bed depth for single column: min. 800 mm
• Backwash bed expansion (at 20°C): 10 % per m/h
• Specific pressure loss (at 15°C): 1.1 kPa*h/m²
• Max. pressure loss during operation: 150 kPa
• Specific flow rate: max. 60 BV/h

Regeneration

• NaOH regeneration concentration: approx. 2-6 % by weight
• NaOH regeneration quantity (co-current): min. 80 g/L resin
• NaOH regeneration quantity (counter-current): min. 40 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. 4 BV

Additional Information

• Safety: Strong oxidants can cause violent reactions. Observe the safety data sheet.
• Disposal: Dispose according to European waste nomenclature.
• Storage: Recommended to store above freezing point, dry, under roof, out of direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling. Packaging stability is limited to 24 months.

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