LEWATIT® S 7968

Summary

Product identification

• Product Name: Lewatit® S 7968
• Type: Food grade, macroporous adsorber resin without functional groups. Monodisperse (uniform size beads).
• Matrix: Styrenic
• Structure: Macroporous
• Common Description: Neutral
• Delivery Form: White, opaque beads
• Edition: 2021-02-05

Applications

This resin can be used in the extraction/purification of natural or synthetic organic products in the food industry. It is also suitable for adsorption/removal of:

• Anionic, cationic, and nonionic surfactants
• Chlorinated and nitrated hydrocarbons
• Colorants or inert organic materials
• Non-polar organic ingredients of low molecular mass from landfill leachates
• Debittering of fruit juices

Key Features

• Very good mechanical stability and low attrition
• Longer resin life time and better regeneration efficiency compared to activated carbon
• High adsorption capacity, especially at medium and high feed concentrations
• Good kinetic performance during adsorption and elution

Physical and Chemical Properties

• Bulk density (shipment, +/- 5%): 600 g/L
• Density (approx.): 1.0 g/mL
• Water retention (delivery form, approx.): 54-63% by weight
• Surface (BET, approx.): 800 m²/g
• Pore volume (approx.): 1.2 cm³/g
• Pore diameter (approx.): 5-10 nm
• Uniformity coefficient (max.): 1.1
• Mean bead size (d₅₀): 0.44-0.54 mm

Operating Limits

• Stability pH range: 0-14
• Stability temperature range: 1-120 °C
• Operating temperature (max.): 120 °C
• Operating pH range (during exhaustion): 0-14
• Bed depth (single column, min.): 1000 mm
• Backwash bed expansion (per m/h at 20°C): 40% (at 15°C)
• Specific pressure loss (at 15°C): 1.5 kPa*h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate (max.): 5 BV/h

Regeneration

• HCl Regeneration:
  • Concentration (approx.): 4-6 wt.%
  • Quantity co-current (min. g/L resin): 100
  • Quantity counter-current (min. g/L resin): 55-65
• H₂SO₄ Regeneration:
  • Concentration (approx.): 1.5-3 wt.%
  • Quantity co-current (min. g/L resin): 150
  • Quantity counter-current (min. g/L resin): 80
• NaOH Regeneration:
  • Concentration (approx.): 2-6 wt.%
  • Quantity co-current (min. g/L resin): 100
  • Quantity counter-current (min. g/L resin): 60
• Regeneration contact time (min.): 30 minutes
• Slow rinse (at regeneration flow rate): 2 BV
• Fast rinse (at service flow rate): 4 BV

Storage and Handling

• Storage Time (after delivery, max.): 2 years
• Storage Temperature range: -20 to +40 °C
• Recommended Storage: Above freezing point of water, under roof, dry, and out of direct sunlight.
• Frozen Resin: Allow to thaw gradually at ambient temperature before handling or use. Do not mechanically handle.
• Packaging Stability: Limited to 24 months under recommended storage conditions. Check packaging condition regularly thereafter.
• Safety: Observe Safety Data Sheet. Avoid contact with strong oxidants.
• Disposal: Dispose according to European waste nomenclature.

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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