IMAC HP555

Summary

Product identification

IMAC HP555 is a macroporous strongly basic anion exchange resin containing quaternary ammonium groups. It has been specially developed for selective nitrate removal from potable waters.

Properties

• Matrix: Styrene divinylbenzene copolymer
• Functional groups: Quaternary ammonium
• Physical form: Cream beads
• Ionic form as shipped: Chloride
• Total exchange capacity: ≥ 0.9 eq/L (Cl- form) [1]
• Moisture holding capacity: 50 to 56 % (Cl- form) [1]
• Shipping weight: 720 g/L
• Specific gravity: 1.055 to 1.085 (Cl- form)
• Particle size:
  • Harmonic mean size: 650 to 850 µm
  • Uniformity coefficient: ≤ 1.5
  • Fines content: < 0.300 mm : 0.3 % max [1]
  • Coarse beads: > 1.180 mm : 5.0 % max
• Reversible swelling: Cl- → NO₃⁻ : negligible

[1] Contractual value

Suggested operating conditions

• Maximum operating temperature: 80°C (Cl⁻ form)
• Minimum bed depth: 700 mm
• Service flow rate: 5 to 40 BV*/h
• Maximum linear velocity: 50 m/h

Regenerant: NaCl

• Level: 125 to 250 g/L
• Flow rate: 2 to 8 BV/h
• Concentration: 5 to 10 %
• Minimum contact time: 30 minutes

Rinse:

• Slow rinse: 2 to 5 BV
• Fast rinse: 2 to 8 BV

*1 BV (Bed Volume) = 1 m³ solution per m³ resin

Applications

IMAC HP555 is recommended for waters containing more sulphate than nitrate, where it offers a higher operating capacity compared to conventional resins. The relative affinities towards anions are: NO₃⁻ > SO₄²⁻ > Cl⁻ > HCO₃⁻. The nitrate level in the effluent will not exceed the influent level after breakthrough.

Commissioning

IMAC HP555 is ready to use, provided it is stored at < 25°C, protected from UV radiation, and used within 6 months of the production date. Upon commissioning, perform a full regeneration cycle followed by a rinse with at least 20 bed volumes of water.

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