LEWATIT® SP 120

Summary

Product identification

LEWATIT® SP 120 is a strongly acidic, very highly crosslinked, macroporous cation exchange resin of standard bead size distribution.

Applications

• Condensate polishing
• Softening of water under arduous conditions
• Treatment of electroplating rinse waters
• Extraction of heavy metals in hydrometallurgical processes

General Description

• Ionic form as shipped: Na⁺
• Functional group: sulfonic acid
• Matrix: crosslinked polystyrene
• Structure: macroporous
• Appearance: beige, opaque

Physical and Chemical Properties

• Uniformity Coefficient: max. 1.8
• Bead size: > 94 % from 0.315 - 1.25 mm
• Effective size: 0.50 mm (+/- 0.08 mm)
• Bulk density: approx. 800 g/l (+/- 5 %)
• Density: approx. 1.20 g/ml
• Water retention: 50 - 55 wt. %
• Total capacity: min. 1.4 eq/l
• Volume change (Na⁺ --> H⁺): max. 5 vol. %
• Stability (pH-range): 0 - 14
• Stability (temperature range): -20 - 120 °C
• Storability (product): max. 2 years
• Storability (temperature range): -20 - 40 °C

Recommended Operating Conditions

• Operating temperature: max. 120 °C
• Operating pH-range: 0 - 14
• Bed depth: min. 800 mm
• Specific pressure drop (15 °C): approx. 1.5 kPa*h/m²
• Pressure drop: max. 250 kPa
• Linear velocity (operation): max. 40 m/h
• Linear velocity (backwash, 20 °C): approx. 14 - 18 m/h
• Bed expansion (20 °C, per m/h): approx. 4.5 vol. %
• Freeboard (backwash, extern/intern): 80 - 100 vol. %

Regeneration (Counter-current)

• Regenerant: HCl, H₂SO₄
• Level (HCl): approx. 60 g/l
• Level (H₂SO₄): approx. 80 g/l
• Concentration (HCl): 4 - 6 wt. %
• Concentration (H₂SO₄): 1.5/3** wt. %
• Linear velocity (regeneration): approx. 5 m/h
• Linear velocity (rinsing): approx. 5 m/h
• Rinse water requirement (slow/fast): approx. 5 BV

Regeneration (Co-current)

• Regenerant: HCl, H₂SO₄
• Level (HCl): approx. 100 g/l
• Level (H₂SO₄): approx. 150 g/l
• Concentration (HCl): approx. 6 - 10 wt. %
• Concentration (H₂SO₄): approx. 1.5/3** wt. %
• Linear velocity (regeneration): approx. 5 - 8 m/h
• Linear velocity (conditioning): approx. 5 - 8 m/h
• Linear velocity (rinsing): approx. 5 - 8 m/h

Additional Information

• Safety precautions: Strong oxidants, e.g. nitric acid, can cause violent reactions. Observe the safety data sheet.
• Storage: Store above freezing point, under roof, dry, and out of direct sunlight. If frozen, allow to thaw gradually before handling or use.

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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