LEWATIT® S 4328

Summary

Product identification

Lewatit® S 4328 is a macroporous anion exchange resin of medium basicity containing tertiary and quaternary amino groups, based on polystyrene. It is bead-shaped with a special bead size distribution.

General Description

• Ionic form as shipped: free base/Cl⁻
• Functional group: tertiary/quaternary amine
• Matrix: crosslinked polystyrene
• Structure: macroporous
• Appearance: beige, opaque

Physical and Chemical Properties

• Uniformity coefficient: max. 1.6
• Bead size: > 90 % between 0.4 - 1.25 mm
• Effective size: 0.55 (+/- 0.05) mm
• Bulk density: 620 (+/- 5 %) g/l
• Density: approx. 1.03 g/ml
• Water retention: 57 - 63 wt. %
• Total capacity: min. 1.4 eq/l
• Volume change (delivered --> Cl⁻): typical 22 vol. %
• Volume change (operational swelling): typical 12 vol. %
• Stability (pH-range): 0 - 14
• Storability (product): max. 2 years
• Storability (temperature range): -20 - 40 °C

Recommended Start-up Conditions (in drinking water and food applications only)

• Linear velocity: approx. 5 m/h
• Rinse water requirement: approx. 20 BV

Recommended Operating Conditions

• Operating temperature: max. 70 °C
• Operating pH-range: 0 - 8
• Bed depth: min. 800 mm
• Specific pressure loss (15 °C): approx. 1.1 kPa*h/m²
• Pressure loss: max. 250 kPa
• Linear velocity (exhaustion): max. - m/h
• Linear velocity (backwash, 20 °C): approx. 4 - 5 m/h
• Bed expansion (20 °C, per m/h): approx. 17 vol. %
• Freeboard (backwash, extern / intern): 80 - 100 vol. %

Regenerant: NaOH

• Counter current regeneration level: approx. 50 - 80 g/l
• Counter current regeneration concentration: 2 - 4 wt. %
• Co current regeneration level: approx. 50 - 80 g/l
• Co current regeneration concentration: approx. 2 - 4 wt. %
• Linear velocity (regeneration): approx. 5 m/h
• Linear velocity (rinsing): approx. 5 - 8 m/h
• Rinse water requirement (slow / fast): approx. 6 BV

Applications

Lewatit® S 4328 is suitable for:

• Removal of acid and simultaneous decolorisation of solutions of organic substances (e.g., sugar, gelatine, glycerin, grape must, whey, fruit concentrates).
• Use in Lewatit® WS system (fluidized bed).
• Use in Lewatit® VWS system (compound fluidized bed).
• Use in standard co-current regenerated systems.

Regulations and Compliance

• Complies with current German legislation on food and food-contact uses.
• Chemically in compliance with FDA regulations FCN 55.
• Complies with European Resolution ResAP (2004)3 with regard to Total Organic Carbon (TOC) release according to AFNOR test T 90-601.

Safety and Handling

• Avoid contact with strong oxidants like nitric acid, which can cause violent reactions.
• Observe the safety data sheet for detailed information on transport, storage, handling, safety, and ecology.
• Store ion exchange resins at temperatures above freezing point, under roof, in dry conditions, and out of direct sunlight.
• If the resin becomes frozen, allow it to thaw gradually at ambient temperature before handling or use. Do not accelerate the thawing process.

Disposal

• In the European Community, ion exchange resins must be disposed of according to the European waste nomenclature.

Disclaimer: 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