LEWATIT® CNP-LF

Summary

Product identification

Lewatit® CNP LF is a food-grade, weakly acidic, macroporous cation exchange resin based on crosslinked polyacrylate. It is bead-shaped with a special bead size distribution.

Applications:

• Cartridges for household filter systems in combination with activated carbon.
• Decarbonisation and softening of drinking water (in hydrogen form).
• Decarbonisation of drinking water and liquids used as foodstuffs or in foodstuff production.

Physical and Chemical Properties

• Ionic form as shipped: H⁺
• Functional group: carboxylic acid
• Matrix: crosslinked polyacrylate
• Structure: macroporous
• Appearance: yellow, opaque
• Uniformity Coefficient: max. 1.8
• Bead size: > 90 % are between 0.315 - 1.6 mm
• Effective size: 0.4 ± 0.08 mm
• Bulk density: 750 g/l (± 5 %)
• Density: approx. 1.19 g/ml
• Water retention: 45 - 50 wt. %
• Total capacity: min. 4.3 eq/l
• Volume change (H⁺ --> Ca²⁺): max. 7 vol. %
• Stability (pH range): 0 - 14
• Storability (months): max. 6
• Storability (temperature range): -20 - 40 °C

Recommended Operating Conditions

• Operating temperature: max. 75 °C
• Operating pH-range: 5 - 14
• Bed depth: min. 800 mm
• Specific pressure drop (15 °C): approx. 1.3 kPa·h/m²
• Pressure drop: max. 250 kPa
• Linear velocity (backwash, 20 °C): approx. 12 - 14 m/h
• Bed expansion (20 °C, per m/h): approx. 4 vol. %
• Freeboard (backwash, external/internal): 60 - 80 vol. %

Regeneration (Counter Current):

• Regenerant: HCl or H₂SO₄
• Level: approx. 70 g/l HCl or 90 g/l H₂SO₄
• Concentration: 3 - 6 wt. % HCl or 0.5 - 0.8 wt. % H₂SO₄

Regeneration (Co Current):

• Regenerant: HCl or H₂SO₄

• Level: approx. 70 g/l HCl or 90 g/l H₂SO₄

• Concentration: approx. 3 - 6 wt. % HCl or 0.5 - 0.8 wt. % H₂SO₄

• Linear velocity (regeneration): approx. 5 - 20 m/h

• Linear velocity (rinsing): approx. 5 - 20 m/h

• Rinse water requirement (slow/fast): approx. 3.5 BV

Additional Information & Regulations

• Safety: Observe the safety data sheet for product description, transport, storage, handling, safety, and ecology.
• Disposal: Dispose according to European waste nomenclature in the European Community.
• Storage: Store above freezing point, under roof, in dry conditions, away from direct sunlight. If frozen, thaw gradually at ambient temperature before handling or use.

Disclaimer: 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