LEWATIT® MonoPlus S 108 H

Summary

Product identification

Lewatit® MonoPlus S 108 H is a strongly acidic, gelular cation exchange resin with beads of uniform size (monodisperse) based on a styrene-divinylbenzene copolymer, in fully regenerated form.

Key Features and Applications

This resin is designed for high performance in demineralization processes, offering:

• Extreme resistance to chemical, osmotic, and mechanical stress.
• Very low leachables even under critical conditions (high temperatures, oxidants, external regeneration).
• Long life cycles due to its special ion exchange resin matrix, even with short cycle times.
• High total capacity resulting in high operating capacities with low ionic leakage and high regenerant utilization.
• Low pressure losses and efficient, cost-optimized operation due to high monodispersity and low fines content.

It is especially suitable for:

• Demineralization of water for industrial steam generation using co-current or modern counter-current systems (e.g., Lewatit WS System, Lewatit Liftbed System, Lewatit Rinsebed System).
• Polishing applications using the Lewatit Multistep System or conventional mixed beds in combination with specific anion resins (Lewatit® MonoPlus M 500 MB, Lewatit® MonoPlus M 800, Lewatit® MonoPlus M 600, Lewatit® MonoPlus MP 500, Lewatit® MonoPlus MP 800, Lewatit® MonoPlus MP 600).

Additional features include:

• High flow rates during regeneration and loading.
• High operating capacity at low regenerant consumption.
• Low demand for rinse water.
• Homogeneous throughput, resulting in a homogeneous operating zone.
• Virtually linear pressure drop gradient, allowing for higher bed depths.
• Low TOC emission and high resistance to oxidative stress.
• Good separation of components in mixed bed applications.

Specified Data

• Uniformity coefficient: max. 1.1
• Mean bead size (d₅₀): 0.65 ±0.05 mm
• Total capacity (delivery form): min. 2.0 eq/L
• Functional group: Sulfonic acid
• Matrix: Styrenic
• Structure: Gelular
• Delivery form: H⁺
• Appearance: Black

Typical Physical and Chemical Properties

• Bulk density for shipment (±5%): 790 g/L
• Density (approx.): 1.22 g/mL
• Water retention (delivery form): approx. 47-53 % by weight
• Volume change (H⁺ - Na⁺) (max. approx.): -10 %
• Stability pH range: 0-14
• Storage time (after delivery) (max.): 2 years
• Storage temperature range: -20 to +40 °C

Operation

• Operating temperature (max.): 140 °C
• Operating pH range during exhaustion: 2-14
• Bed depth for single column (min.): 800 mm
• Bed depth per component in mixed bed (min.): 500 mm
• Backwash bed expansion per m/h (20°C): 4.5 %
• Specific pressure loss (15°C): 1 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate (max.): 60 BV/h

Regeneration

• HCl regeneration concentration (approx.): 4-6 wt. %
• HCl regeneration quantity co-current (min.): 100 g/L resin
• HCl regeneration quantity counter-current (min.): 55 g/L resin
• H₂SO₄ regeneration concentration (approx.): 1.5-8 wt. %
• H₂SO₄ regeneration quantity co-current (min.): 120 g/L resin
• H₂SO₄ regeneration quantity counter-current (min.): 80 g/L resin
• Regeneration contact time (min.): 20 minutes
• Slow rinse at regeneration flow rate (min.): 2 BV
• Fast rinse at service flow rate (min.): 2 BV

Additional Information & Regulations

• Safety precautions: Strong oxidants, e.g., nitric acid, can cause violent reactions if they come into contact with ion exchange resins.
• Toxicity: The safety data sheet must be observed.
• Disposal: Ion exchange resins must be disposed of according to the European waste nomenclature.
• Storage: Store in dry conditions, protected from direct sunlight, above the freezing point of water. If frozen, allow to thaw gradually at ambient temperature before handling or use.
• Packaging: Packaging stability is limited to 24 months under recommended storage conditions.

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