LEWATIT® CNP 80

Summary

Product identification

• Product Name: Lewatit® CNP 80
• Description: Weakly acidic, macroporous, acrylic-based cation exchange resin of standard bead size distribution.
• Edition: 2020-11-26

Applications

• Dealkalization of industrial water by co-current systems
• Decationization step in demineralization of water (in combination with a strong acidic cation exchange resin, e.g. Lewatit® MonoPlus S 108)
• Removal of temporary hardness (hardness associated with alkalinity)
• Polisher in a single bed unit downstream of a demineralization unit for removal of cations present as hydroxides at high flow rates
• Produced water softening (as single filter unit or polisher in combination with Lewatit® S 1567)
• Removal/extraction of heavy metals (copper, nickel, zinc) from electroplating rinse waters at pH > 5, in its sodium-form, in the absence of calcium and complexing agents.

Specified Data

• Common Description:
  • Delivery form: H⁺
  • Functional group: Carboxylic acid
  • Matrix: Crosslinked polyacrylate
  • Structure: Macroporous
  • Appearance: Yellow, white
• Uniformity coefficient: max. 1.8
• Range of size for >90 vol% of all beads: 0.315 - 1.6 mm
• Effective size (d₁₀): 0.43 - 0.58 mm
• Total capacity (delivery form): min. 4.3 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 740 g/L
• Density (approx.): 1.2 g/mL
• Water retention (delivery form): 41 - 47 % by weight
• Volume change (H⁺ - Na⁺): max. 70 %
• Stability pH range: 0 - 14
• Storage time (after delivery): max. 2 years
• Storage temperature range: -20 - +40 °C

Operation

• Operating temperature: max. 95 °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): 4 %
• Specific pressure loss (at 15°C): 1.3 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate: max. 40 BV/h
• Freeboard during backwash: min. 100 vol. %

Regeneration

• HCl regeneration concentration: approx. 3 - 6 wt. %
• HCl regeneration quantity (co-current): min. 70 g/L resin
• H₂SO₄ regeneration concentration: approx. 0.5 - 0.8 wt. %
• H₂SO₄ regeneration quantity (co-current): min. 90 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

Additional Information & Regulations

• Safety: Strong oxidants can cause violent reactions. Observe the safety data sheet.
• Disposal: Follow European waste nomenclature.
• Storage: Store dry, under roof, above freezing point, protected from sunlight. If frozen, thaw gradually at ambient temperature before use.
• Packaging: Packaging stability limited to 24 months under recommended storage conditions. Use within this timeframe or check packaging condition regularly.

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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