LEWATIT® MonoPlus SM 1000 KR-7Li

Summary

Product identification

Lewatit® MonoPlus SM 1000 KR-7Li is a ready-to-use mixed bed resin. It comprises a strongly acidic gel-type cation exchange resin in the ⁷Li⁺ form and a strongly basic (type I) gel-type anion exchange resin in fully regenerated form. It is a cation to anion exchanger 1:2 mixture, premium grade, and purified to meet nuclear industry specifications. Other mix ratios are available on request. Lewatit® nuclear resins (Lewatit® KR) are noted for their outstanding mechanical and chemical stability, as well as high osmotic stability. They offer excellent hydrodynamic properties allowing particularly high flow rates and result in particularly low pressure losses due to extremely high monodispersity and very low fines content.

Applications

Lewatit® MonoPlus SM 1000 KR-7Li is particularly suitable for:

• Polishing in primary sections as a mixed bed component.
• Decontamination of circuits in nuclear reactor plants.
• Treatment of primary coolant, e.g., in pressure water reactors.
• Removal of activated cleavage or corrosion products, including mechanical filtration of suspended impurities.

Product Information

Common Description

• Delivery form: Li-/OH-
• Functional group: Quaternary ammonium (anion), Sulfonic acid (cation)
• Matrix: Styrenic
• Structure: Gel
• Appearance: Black/Light brown translucent

Specified Data

• Mean bead size (SAC component) d₅₀: 0.60 (±0.05) mm
• Mean bead size (SBA component) d₅₀: 0.64 (±0.05) mm
• Total capacity (SAC component H⁺ form): min. 2.1 eq/L
• Total capacity (SBA component OH⁻ form): min. 1.2 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (±5%): 720 g/L
• Density: approx. 1.14 g/mL
• Water retention (delivery form): approx. 42-63 % by weight
• Volume change (during exhaustion): max. approx. -15 %
• Stability pH range: 0-14
• Storage time (after delivery): max. 1 year
• Storage temperature range: -20 to +40 °C
• Friability: > 95 min. vol %
• Ionic conversion OH⁻: min. 95 % (SBA)
• Ionic conversion CO₃²⁻: max. 5 % (SBA)
• Ionic conversion Cl⁻: max. 0.2 % (SBA)
• Ionic conversion SO₄²⁻: max. 0.3 % (SBA)
• Ionic conversion ⁷Li⁺: min. 99 % (SAC)

Operation

Operating Limits

• Operating temperature: max. 60 °C
• Operating pH range during exhaustion: 0-14
• Bed depth for single column: min. 800 mm
• Specific pressure loss (15°C): 1 kPa*h/m²
• Max. pressure loss during operation: 200 kPa
• Specific flow rate: max. 100 BV/h

Trace Impurities (max. mg/kg dry resin)

• Na: 50
• Fe: 30
• Cu: 5
• Al: 5
• Co: 5
• Pb: 10
• Hg: 5
• SiO₂: 50
• Total Chloride: 500
• SO₄²⁻ as Sulphur: 600 (SBA)

Additional Information & Regulations

Safety Precautions

Strong oxidants, e.g., nitric acid, can cause violent reactions if they come into contact with ion exchange resins. The safety data sheet must be observed.

Storage

Ion exchange resins should be stored above the freezing point of water, under roof, in dry conditions without direct sunlight. If resin freezes, it should thaw gradually at ambient temperature before handling or use.

Packaging

Packaging stability is limited to 24 months under recommended storage conditions. It is advised to use the product within this timeframe or ensure the packaging condition is checked regularly.

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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