LEWATIT® S 6368 A SO4

Summary

Product identification

Lewatit® S 6368 A SO4 is a food grade, macroporous, monodisperse, strongly basic (type I) anion exchange resin based on a styrene-divinylbenzene copolymer.

It is specially applicable for:

• Removal of acid and simultaneous decolorisation of solutions of organic substances (e.g., sugar, gelatine, glycerine, grape must, whey, fruit concentrates) in its hydroxide (OH⁻) form.
• Decolorisation of sugar syrup (beet or cane), glycerine, grape must, and fruit juices in its chloride (Cl⁻) form.

The macroporous structure allows for good adsorption of organic substances (e.g., colorants) and partial adsorption of organic and mineral acids. Desorption is achieved by regeneration with caustic soda solution (OH⁻ form) or alkalized brine solution (Cl⁻ form).

Special care should be given to the initial cycles when treating potable water or the listed aqueous solutions. Recommended start-up conditions are available on request.

Product Information

• Common Description:
  • Delivery form: SO₄²⁻
  • Functional group: Quaternary ammonium, Type 1
  • Matrix: Styrenic
  • Structure: Macroporous
  • Appearance: Beige, opaque
• Specified Data:
  • Uniformity coefficient: max. 1.1
  • Mean bead size (d₅₀): 0.58-0.68 mm
  • Total capacity (delivery form): min. 1.0 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 680 g/L
• Density: approx. 1.1 g/mL
• Water retention (delivery form): approx. 60-65 % by weight
• Volume change (Cl⁻ - OH⁻): max. approx. 22 %
• Stability pH range: 0-14
• Stability temperature range: 1-85 °C (Cl⁻); 0-14 (not specified for OH⁻)
• Storage time (after delivery): max. 2 years
• Storage temperature range: -20 - +40 °C

Operation

• Operating temperature: max. 85 °C (Cl⁻); 70 °C (OH⁻)
• Operating pH range during exhaustion: 0-12
• 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): 12 %
• Specific pressure loss (15°C): 0.8 kPa*h/m²
• Max. pressure loss during operation: 300 kPa
• Specific flow rate: max. 5 BV/h
• Freeboard during backwash: min. 80-100 vol. %

Regeneration

• NaCl Regeneration:
  • Concentration: approx. 10 wt. %
  • Quantity (co-current): min. 200 g/L resin
  • Quantity (counter-current): min. 200 g/L resin
• NaOH Regeneration:
  • Concentration: approx. 2-6 wt. %
  • Quantity (co-current): min. 90 g/L resin
  • Quantity (counter-current): min. 50 g/L resin
• NaCl/NaOH Regeneration:
  • Concentration: 10 wt. % NaCl / 1-2 wt. % NaOH
  • Quantity (co-current): 200 g/L resin / 20 g/L resin
  • Quantity (counter-current): 200 g/L resin / 20 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. 4 BV

Additional Information & Regulations

• Safety Precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions. Observe the safety data sheet.
• Disposal: Dispose of ion exchange resins according to European waste nomenclature.
• Storage: Store under roof in dry conditions, above freezing point, without direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use. Do not accelerate thawing.
• Packaging: Packaging stability is limited to 24 months under recommended storage conditions. Use product within this timeframe or check packaging condition regularly.

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