LEWATIT® MDS TP 208

Summary

Product identification

• Product Name: Lewatit® MDS TP 208
• Common Description: Weakly acidic, macroporous cation exchange resin with chelating iminodiacetic acid groups. Small bead variant of Lewatit® MonoPlus TP 208 with excellent kinetic performance.
• Functional group: Iminodiacetic acid
• Matrix: Styrenic
• Structure: Macroporous
• Delivery form: Na⁺ form
• Appearance: Beige, opaque

Operating limits

• Stability pH range: 0-14
• Stability temperature range: 1-80 °C
• Storage temperature range: -20 - +40 °C
• Operating temperature: max. 80 °C
• Operating pH range during exhaustion: 2-12
• Max. pressure loss during operation: 250 kPa

Feed water

• Application: Selective removal of alkaline earth cations (Ca²⁺, Mg²⁺, Ba²⁺, Sr²⁺), heavy metal cations (e.g., Cu²⁺, VO²⁺, UO₂²⁺, Pb²⁺, Ni²⁺, Zn²⁺, Cd²⁺, Co²⁺, Fe²⁺, Be²⁺, Mn²⁺), and fine polishing of brine fed to chloralkali membrane cells. Suitable for diluted and concentrated brine solutions, and for process, waste, and potable water streams.

Product water

• Advantages: Up to 100 % higher operating capacity without requiring additional regenerant chemicals, lower leakage levels, improved Strontium and Barium removal efficiency.

Electrical

No information available in the extract.

Mechanical / hydraulic

• Uniformity coefficient: max. 1.15
• Mean bead size (d₅₀): 0.38 (± 0.04) mm
• Bulk density for shipment: 700 g/L (± 5%)
• Density: approx. 1.16 g/mL
• Water retention (delivery form): approx. 59-65 % by weight
• Volume change (Na⁺ - H⁺): max. approx. -35 %
• Bed depth for single column: min. 1000 mm
• Backwash bed expansion per m/h (20°C): 12 %
• Specific pressure loss (15°C): 3 kPa*h/m²
• Specific flow rate: max. 5-25 BV/h
• Freeboard during backwash: min. 100 vol. %

Regeneration

• Regeneration: HCl
  • Concentration: approx. 4-10 wt. %
  • Quantity (co-current): min. 150 g/L resin
  • Contact time: min. 20 minutes
  • Slow rinse: min. 4 BV at regeneration flow rate

Conditioning

• Conditioning: NaOH
  • Concentration: approx. 4 wt. %
  • Quantity (Di-Na⁺): min. 80-96 g/L resin
  • Contact time: min. 20 minutes
  • Slow rinse: 4 BV at conditioning flow rate

Additional Information

• Safety Precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions with ion exchange resins. Observe the safety data sheet.
• Disposal: Dispose of ion exchange resins according to European waste nomenclature.
• Storage: Store above freezing point, under roof, dry, and out of direct sunlight. If frozen, thaw gradually at ambient temperature before handling or use.
• Packaging Stability: Limited to 24 months under recommended storage conditions. Check packaging condition regularly if used beyond this timeframe.

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