LEWATIT® S 2568

Summary

Product Identification

• Product Name: LEWATIT® S 2568
• Product Type: Strongly acidic cation exchange resin
• Matrix: Styrene-divinylbenzene copolymer
• Structure: Macroporous, monodisperse
• Functional Group: Sulfonic acid
• Common Description: Na⁺
• Appearance: Beige-gray, opaque
• Delivery Form: Na⁺

Applications

LEWATIT® S 2568 is especially applicable for:

• Decationization of solutions of organic products (e.g., sugar beet, sugar cane, starch sugar, glycerine, gelatine, food acids).
• Extraction of amino acids (e.g., lysine).
• Softening of solutions, especially of sugar thin juices.

The resin offers features such as:

• High exchange flow rates during regeneration and loading.
• Good utilization of capacity.
• Low rinse water demand.
• Homogeneous throughput of regenerants, water, and solutions.
• Nearly linear pressure drop gradient allowing for higher bed depth.
• Good separation behavior in mixed bed applications.

Specified Data

• Uniformity coefficient: max. 1.1
• Mean bead size (d50): 0.60-0.70 mm
• Total capacity (delivery form): min. 1.7 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (+/- 5%): 740 g/L
• Density (approx.): 1.2 g/mL
• Water retention (delivery form): approx. 50-55 wt. %
• Volume change (Na⁺ - H⁺): max. approx. 10 %
• Stability pH range: 0-14
• Stability temperature range: 1-120 °C
• Storage time (after delivery): max. 2 years
• Storage temperature range: -20 - +40 °C

Operating Parameters

• Operating temperature (max.): 120 °C
• Operating pH range during exhaustion: 0-14
• Bed depth for single column (min.): 800 mm
• Backwash bed expansion (per m/h at 20°C): 4 %
• Specific pressure loss (at 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. vol. %): 80-100 %

Regeneration Parameters

HCl Regeneration:

• Concentration: approx. 4-6 wt. %
• Quantity co-current (min.): 100 g/L resin
• Quantity counter-current (min.): 55-65 g/L resin

H₂SO₄ Regeneration:

• Concentration: approx. 1.5-3 wt. %
• Quantity co-current (min.): 150 g/L resin
• Quantity counter-current (min.): 100 g/L resin

NaCl Regeneration:

• Concentration: approx. 8-10 wt. %
• Quantity co-current (min.): 200 g/L resin
• Quantity counter-current (min.): 100 g/L resin

General Regeneration:

• 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: Avoid contact with strong oxidants. Observe safety data sheet.
• Disposal: According to European waste nomenclature.
• Storage: Recommended above freezing point, dry, under roof, out of direct sunlight. If frozen, thaw gradually at ambient temperature.
• Packaging stability: Limited to 24 months under recommended storage conditions.

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