LEWATIT® K 2640

Summary

Product identification

Lewatit® K 2640 is a strongly acidic, macroporous, polymer-based ion exchange resin with sulfonic acid groups, supplied in spherical bead form. It is hyper-activated for increased acidity and reactivity.

Applications

This resin is ideally suited as a heterogeneous catalyst for organic reactions and for processing aqueous and organic liquids, particularly for:

• Phenol alkylation with olefins
• Olefin oligomerizations
• Etherification and alkylation of larger polar and non-polar molecules

Note: For reactions involving the use or formation of water, Lewatit® K 2620 is recommended. Lewatit® K 2640 is the dried form of Lewatit® K 2620.

Physical and Chemical Properties

• Ionic form as shipped: H⁺
• Functional group: Sulfonic acid
• Matrix: Crosslinked polystyrene
• Structure: Porous beads
• Total capacity: min. 5.2 eq/kg (dry)
• Bead size: > 90 % between 0.4 - 1.25 mm
• Fines (< 0.315 mm): max. 4 vol. %
• Bulk density: approx. 570 g/l (± 5 %)
• Residual water: max. 2 wt. %
• Surface area (BET): approx. 33 m²/g
• Pore volume: approx. 0.45 cm³/g
• Average pore diameter: 41 nm

Operating limits

• Stability temperature range: -20 to 140 °C
• Storability temperature range: -20 to 40 °C

Additional Information

• Safety: Avoid contact with strong oxidants like nitric acid, which can cause violent reactions. Observe the Safety Data Sheet for detailed information.
• Disposal: Dispose of ion exchange resins according to European waste nomenclature within the European Community.
• Storage: Store above freezing point of water, under roof, in dry conditions, away from direct sunlight. If frozen, allow to thaw gradually at ambient temperature before handling or use.

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