LEWATIT® MonoPlus TP 208

Summary

Product identification

Lewatit® MonoPlus TP 208 is a weakly acidic, macroporous cation exchange resin with chelating iminodiacetic acid groups. It is designed for the selective removal of alkaline earth cations. The resin features monodisperse, uniform sized beads.

Common Description

• Delivery form: Na⁺
• Functional group: Iminodiacetic acid
• Matrix: Styrenic
• Structure: Macroporous
• Appearance: Beige, opaque

Specified Data

• Uniformity coefficient: max. 1.1
• Mean bead size (d₅₀): 0.65 (+/- 0.05) mm
• Total capacity (H⁺ form): min. 2.5 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 700 g/L
• Density: approx. 1.19 g/mL
• Water retention (delivery form): approx. 58-64 % by weight
• Volume change (Na⁺ - H⁺): max. approx. -30 %
• Stability pH range: 0-14
• Stability temperature range: 1-80 °C
• Storage temperature range: -20 - +40 °C

Operation

Operating Limits

• Operating temperature: max. 80 °C
• Operating pH range during exhaustion: 2-12
• Bed depth for single column: min. 1000 mm
• Backwash bed expansion (at 20°C): 5 % per m/h
• Specific pressure loss (at 15°C): 1.0 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate: max. 5-25 BV/h
• Freeboard during backwash: min. 100 vol. %

Regeneration

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

Conditioning

• NaOH conditioning concentration: approx. 4 wt. %
• NaOH conditioning, Na⁺ quantity: min. 80-96 g/L resin
• Conditioning contact time: min. 20 minutes
• Slow rinse at conditioning flow rate: min. 4 BV

Applications

Lewatit® MonoPlus TP 208 is suitable for the adsorption of alkaline earth and heavy metal cations from diluted and concentrated brine solutions. It is used for:

• Fine polishing of brine fed to chloralkali membrane cells, for the removal of Ca²⁺, Mg²⁺, Ba²⁺, Sr²⁺, also in the presence of Fe³⁺ ions.

It is also used for the removal and recovery of heavy metals from process, waste, and potable water streams. The order of removal from neutralized waters (decreasing affinity) is: Copper > Vanadium (VO₂⁺) > Uranium (UO₂²⁺) > Lead > Nickel > Zinc > Cadmium > Cobalt > Iron (II) > Beryllium > Manganese >> Calcium > Magnesium > Strontium > Barium >>> Sodium.

Safety and Storage

Safety Precautions

• Strong oxidants, e.g. nitric acid, can cause violent reactions if they come into contact with ion exchange resins.
• Refer to the safety data sheet for additional information on product description, transport, storage, handling, safety, and ecology.

Storage

• Recommended storage: above the freezing point of water, under roof, in dry conditions, and protected from direct sunlight.
• If frozen, allow to thaw gradually at ambient temperature before handling or use. Do not accelerate thawing.
• Packaging stability is limited to 24 months under recommended storage conditions. Use within this timeframe or check packaging condition regularly.

Disposal

• In the European Community, dispose of ion exchange resins according to the European waste nomenclature.

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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