LEWATIT® MonoPlus S 108 KR

Summary

Product identification

• Product Name: LEWATIT® MonoPlus S 108 KR
• Product Type: Strongly acidic, gel-type cation exchange resin with uniform bead size (monodisperse).
• Special Features: Highly regenerated, purified (extremely low content of desorbable chloride ions) to meet nuclear industry specifications. Outstanding mechanical and chemical stability, high osmotic stability, excellent hydrodynamic properties, very low pressure losses due to high monodispersity and low fines content.

Applications

• Removal of cations, including radioactive isotopes, from aqueous solutions.
• pH control through adsorption of excess ⁷Li.
• Decontamination of circuits in nuclear reactor plants.
• Removal of radioactive cations such as ⁷³⁷Cs (fuel cooling).
• Treatment of primary coolant in pressure water reactors.
• Purification of steam generator blowdown.
• Removal of activated cleavage or corrosion products, including mechanical filtration of suspended impurities.
• Polishing in primary and secondary sections as a mixed bed component with Lewatit MonoPlus® M 800 KR or Lewatit MonoPlus® MP 800 KR.

Operating limits

• Operating Temperature: Max. 140 °C
• Operating pH Range (during exhaustion): 2-14
• Stability pH Range: 0-14
• Max. Pressure Loss (during operation): 250 kPa

Feed water

• Regeneration:
  • HCl Concentration: approx. 4-6 wt.%
  • HCl Quantity (co-current): min. 100 g/L resin
  • HCl Quantity (counter-current): min. 55 g/L resin
  • H₂SO₄ Concentration: approx. 1.5-8 wt.%
  • H₂SO₄ Quantity (co-current): min. 120 g/L resin
  • H₂SO₄ Quantity (counter-current): min. 80 g/L resin
  • Regeneration Contact Time: min. 20 minutes
• Rinse:
  • Slow Rinse: min. 2 BV (at regeneration flow rate)
  • Fast Rinse: min. 2 BV (at service flow rate)

Product water

• See the official PDF for exact tabulated values.

Electrical

• Not applicable.

Mechanical / hydraulic

• Uniformity Coefficient: max. 1.1
• Mean Bead Size (d₅₀): 0.65 (+-0.05) mm
• Bulk Density (for shipment): 790 g/L (+/- 5%)
• Density: approx. 1.22 g/mL
• Water Retention (delivery form): approx. 47-53 wt.%
• Volume Change (H⁺ - Na⁺): max. approx. -10 %
• Friability (average g/bead): 600 (min. 95 vol % >200 g/bead)
• Bed Depth (single column): min. 800 mm
• Bed Depth (mixed bed component): min. 500 mm
• Backwash Bed Expansion (per m/h at 20°C): 4.5 %
• Specific Pressure Loss: 1 kPa*h/m² (at 15°C)
• Specific Flow Rate: max. 100 BV/h

Chemical properties

• Functional Group: Sulfonic acid
• Matrix: Styrenic
• Structure: Gel
• Total Capacity (delivery form): min. 2.0 eq/L
• Ionic Conversion (H⁺): min. 99.9 % eq. %

Trace Impurities (max. mg/kg dry resin)

• Na: 50
• Fe: 30
• Cu: 5
• Al: 5
• Co: 5
• Pb: 10
• Hg: 5
• SiO₂: 20
• Organic Chloride: 60

Storage and Handling

• Storage Temperature Range: -20 to +40 °C
• Storage Time (after delivery): max. 2 years
• Recommended Storage: Store above freezing point of water, under roof, in dry conditions, without direct sunlight.
• Frozen Resin: Thaw gradually at ambient temperature before handling or use.
• Safety Precautions: Avoid contact with strong oxidants (e.g., nitric acid). Observe safety data sheet.
• Disposal: Follow European waste nomenclature for ion exchange resins.

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