IRN 78

Summary

Product identification

AMBERLITE™ IRN78 is a nuclear grade strong base anion resin. It is a gel type polystyrene anion exchange resin, supplied in the hydroxide (OH⁻) form.

Properties

• Physical form: Yellow spherical beads
• Matrix: Styrene divinylbenzene copolymer
• Functional group: Trimethylammonium
• Ionic form as shipped: OH⁻
• Total exchange capacity: ≥ 1.20 eq/L (OH⁻ form)
• Moisture holding capacity: 54 to 60 % (OH⁻ form)
• Shipping weight: 690 g/L
• Particle size:
  • Uniformity coefficient: ≤ 1.2
  • Harmonic mean size: 0.580 to 0.680 mm
• Fine resin beads (< 0.300 mm): 0.2 % max
• Whole beads: ≥ 95 %
• Breaking weight (average): ≥ 350 g/bead
• Ionic conversion:
  • ≥ 95 % OH⁻
  • ≤ 5 % CO₃²⁻
  • ≤ 0.1 % Cl⁻
  • ≤ 0.1 % SO₄²⁻

Purity

The manufacturing process is controlled to minimize inorganic impurities. Special treatments remove trace soluble organic compounds.

• Impurities (mg/kg dry resin):
  • Al: ≤ 50
  • Ca: ≤ 50
  • Co: ≤ 30
  • Cu: ≤ 10
  • Fe: ≤ 50
  • Hg: ≤ 20
  • K: ≤ 40
  • Mg: ≤ 50
  • Na: ≤ 50
  • Pb: ≤ 10
  • Total Cl: ≤ 500
  • SiO₂: ≤ 100
  • Total SO₄: ≤ 600

Suggested operating conditions

• Maximum operating temperature: 60 °C
• Minimum bed depth: 800 mm
• Service flow rate: 8 to 50 BV*/h (BV = Bed Volume = 1 m³ solution per m³ resin)
• Service velocity: 60 m/h maximum

Hydraulic characteristics

• Bed expansion: For backwashing, a minimum bed expansion of 50 % is recommended. See official PDF for bed expansion curves at various temperatures and flow rates.
• Pressure drop: Pressure drop data for normal downflow operation at various temperatures and flow rates are available in the official PDF.

Applications

AMBERLITE IRN78 resin is effective in:

• Primary water treatment: Removing ¹³¹Iodine, ¹³³Iodine, chloride traces, and controlling boron levels in reactor coolant systems.
• Radwaste treatment: Removing radioactive anions such as ¹³¹Iodine and ¹³³Iodine from waste systems.
• Decontamination: Removing anionic radioactive material from spent decontaminating solutions.
• Steam generator blow down purification: Removing anionic impurities from secondary streams in the presence of ammonia, morpholine, or other amines at elevated pH.

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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