LEWATIT® CNP 80 WS

Summary

Product identification

• Product Name: LEWATIT® CNP 80 WS
• Common Description: Weakly acidic, macroporous, acrylic-based cation exchange resin of standard bead size distribution.
• Functional group: Carboxylic acid
• Matrix: Crosslinked polyacrylate
• Structure: Macroporous
• Delivery form: H⁺
• Appearance: Yellow, white

Applications

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

Specified Data

• Uniformity coefficient: max. 1.8
• Range of size for >90% vol of all beads: 0.4 - 1.6 mm
• Effective size (d10): 0.48 - 0.58 mm
• Total capacity (delivery form): min. 4.5 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 750 g/L
• Density: approx. 1.19 g/mL
• Water retention (delivery form): approx. 42 - 47 % weight
• Volume change (H⁺ to Ca²⁺): max. approx. 7 %
• Volume change (H⁺ to Na⁺): max. approx. 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 (20°C): 4 %
• Specific pressure loss (15°C): 1.3 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate: max. 40 BV/h

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: 2 BV
• Fast rinse at service flow rate: 2 BV

Additional Information & Regulations

• Safety precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions. Observe the safety data sheet.
• Storage: Recommended to store above freezing point, dry, under roof, out of direct sunlight. If frozen, thaw gradually at ambient temperature.
• 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