LEWATIT® S 6268

Summary

Product identification

Lewatit® S 6268 is a food grade, gelular, monodisperse, strongly basic (type I) anion exchange resin based on a styrene-divinylbenzene copolymer.

• Common Description: Gel, Strongly Basic, Type I Anion Exchange Resin
• Delivery form: Chloride (Cl⁻)
• Functional group: Quaternary ammonium
• Matrix: Styrenic
• Structure: Gel
• Appearance: Yellow, translucent

Applications

Preferred applications include:

• Demineralization of waters with high organic load.
• Decolorization of sugar (cane or beet) solutions.
• Removal of acid and simultaneous decolorization of solutions of organic substances (e.g., sugar, gelatine, glycerine, grape must, whey, fruit concentrates) when in hydroxide form.
• Decolorization of sugar syrup (beet or cane), glycerine, grape must, fruit juices when in chloride form.
• Organic traps (scavengers) for treating waters with high organic concentrations.

Key Features

• High flow rates during regeneration and loading.
• Good utilization of total capacity.
• Low demand for rinse water.
• Homogeneous throughput of regenerants, water, and solutions.
• Virtually linear pressure drop gradients.
• Good separation of components in mixed bed applications.
• Higher thermal stability compared to acrylic resins.
• Outstanding physical and osmotic stability.
• Optimized kinetics due to monodisperse bead size.

Specified Data

• Uniformity coefficient: max. 1.1
• Mean bead size (d₅₀): 0.57-0.67 mm
• Total capacity (delivery form): min. 1.2 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 690 g/L
• Density: approx. 1.1 g/mL
• Water retention (delivery form): approx. 48-55% by weight
• Volume change (Cl⁻ - OH⁻): max. approx. 25%
• Stability pH range: 0-14
• Stability temperature range: 1-90 °C (Cl⁻ form)
• Storage time (after delivery): min. 2 years
• Storage temperature range: -20 - +40 °C

Operating Conditions

• Operating temperature: max. 90 °C (Cl⁻ form); max. 70 °C (OH⁻ form)
• Operating pH range during exhaustion: 0-12
• Bed depth for single column: min. 800 mm
• Backwash bed expansion (per m/h at 20°C): 11 %
• Specific pressure loss (at 15°C): 1 kPa*h/m²
• Max. pressure loss during operation: 200 kPa
• Specific flow rate: max. 5 BV/h
• Freeboard during backwash: min. 80-100 vol. %

Regeneration

• NaCl regeneration concentration: approx. 10 wt. %
• NaCl regeneration quantity (co-current): min. 200 g/L resin
• NaCl regeneration quantity (counter-current): min. 200 g/L resin
• NaOH regeneration concentration: approx. 2-6 wt. %
• NaOH regeneration quantity (co-current): min. 90 g/L resin
• NaOH regeneration quantity (counter-current): min. 50 g/L resin
• NaCl/NaOH regeneration concentration: approx. 10/1-2 wt. %
• NaCl/NaOH regeneration quantity (co-current): min. 200/20 g/L resin
• NaCl/NaOH regeneration quantity (counter-current): min. 200/20 g/L resin
• Regeneration contact time: min. 30 minutes
• Slow rinse at regeneration flow rate: min. 2 BV
• Fast rinse at service flow rate: min. 4 BV

Safety and Handling

• Avoid contact with strong oxidants like nitric acid, which can cause violent reactions.
• Observe the Safety Data Sheet for detailed product information, transport, storage, handling, safety, and ecology data.
• Store resins above the freezing point of water, under roof, in dry conditions, and out of direct sunlight.
• Frozen resin should thaw gradually at ambient temperature and not be mechanically handled until completely thawed.
• Recommended storage is within 24 months of delivery, after which packaging condition should be regularly checked.

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