LEWATIT® S 6368 A

Summary

Product identification

Lewatit® S 6368 A is a food-grade, strongly basic macroporous anion exchange resin (type I) with uniform bead size (monodisperse) based on polystyrene.

Applications

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

The macroporous structure aids in the adsorption of organic substances, which can be desorbed by regeneration with caustic soda solution (OH⁻ form) or alkalized brine solution (Cl⁻ form). Special care is recommended for the initial cycles when treating potable water and the listed aqueous solutions.

Physical and Chemical Properties

• Ionic form as shipped: chloride
• Functional group: quaternary amine, type I
• Matrix: crosslinked polystyrene
• Structure: macroporous
• Appearance: beige, opaque
• Uniformity Coefficient: max. 1.1
• Mean bead size: 0.62 mm (± 0.05 mm)
• Bulk density: 640 g/l (± 5 %)
• Density: approx. 1.06 g/ml
• Water retention: 60 - 65 wt. %
• Total capacity: min. 1.0 eq/l
• Volume change (Cl⁻ → OH⁻): max. 20 %
• Stability (pH-range): 0 - 14
• Storability: max. 2 years
• Storability temperature range: -20 - +40 °C

Recommended Operating Conditions

• Operating temperature: max. 70 °C (OH⁻ form) / 85 °C (Cl⁻ form)
• Operating pH-range: 0 - 12
• Bed depth: min. 800 mm
• Specific pressure drop (at viscosity 1 mPa·s): approx. 0.8 kPa·h/m²
• Pressure drop: max. 300 kPa
• Linear velocity (backwash at 20 °C): approx. 4 - 5 m/h
• Freeboard (backwash): 80 - 100 vol. %
• Regenerant (OH⁻ form): NaOH
• Regenerant (Cl⁻ form): NaCl/NaOH
• Counter current regeneration level (OH⁻): approx. 60-80 g/l NaOH
• Counter current regeneration level (Cl⁻): approx. 200 g/l NaCl / 20 g/l NaOH
• Counter current regeneration concentration (OH⁻): 4 wt. % NaOH
• Counter current regeneration concentration (Cl⁻): 10 wt. % NaCl / 1 wt. % NaOH
• Co-current regeneration level (OH⁻): approx. 60-80 g/l NaOH
• Co-current regeneration level (Cl⁻): approx. 200 g/l NaCl / 20 g/l NaOH
• Co-current regeneration concentration (OH⁻): approx. 4 wt. % NaOH
• Co-current regeneration concentration (Cl⁻): approx. 10 wt. % NaCl / 1 wt. % NaOH
• Linear velocity (regeneration): approx. 5 m/h
• Linear velocity (rinsing): approx. 5 m/h
• Rinse water requirement (slow / fast): approx. 4 BV

Additional Information & Regulations

• Safety precautions: Strong oxidants can cause violent reactions. Observe the safety data sheet.
• Disposal: Follow European waste nomenclature.
• Storage: Store above freezing point, under roof, dry, and out of direct sunlight. If frozen, thaw gradually at ambient temperature.

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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