Amberlite IRC748

Summary

Product identification

AMBERLITE™ IRC748 Industrial Grade Chelating Resin for Metals Removal

Description: AMBERLITE IRC748 is an iminodiacetic acid chelating cation exchange resin with high selectivity for calcium, magnesium, and strontium in chloralkali brines. It also exhibits high selectivity for heavy metal cations over alkali metal ions in various process and waste streams. The resin is based on a macroreticular styrene divinylbenzene matrix with iminodiacetic acid functional groups. It is supplied in the Na⁺ form as opaque, beige beads.

Typical Properties

These properties are typical but do not constitute specifications.

• Matrix: Macroporous styrene divinylbenzene
• Functional groups: Iminodiacetic acid
• Physical form: Opaque, beige beads
• Ionic form as shipped: Na⁺
• Total exchange capacity [1]: ≥ 1.35 eq/L (Na⁺ form)
• Moisture holding capacity [1]: 60.0 to 65.0 % (Na⁺ form)
• Shipping weight: 750 g/L (46.8 lb/ft³)
• Particle size:
  • Harmonic mean size [1]: 0.50 - 0.65 mm
  • Uniformity coefficient: ≤ 1.7
  • Fines content [1] (< 0.300 mm): 1.0 % max.
  • Coarse beads (> 1.100 mm): 5.0 % max.
• Typical reversible swelling:
  • H⁺ → Na⁺: 30 %

[1] Contractual value. Test methods are available on request.

Suggested Operating Conditions

• Maximum operating temperature: 90°C (195°F)
• pH range: 1.5 to 14 (depending on applications)
• Service flow rate: 6 to 32 BV*/h (0.75 to 4 gpm/ft³)

Regenerant:

• Acid: HCl or H₂SO₄
  • Concentration: 5 to 10 %
  • Flow rate: 2 to 4 BV/h (0.25 to 0.50 gpm/ft³)
• Sodium form conversion: 1 - 4 % NaOH, flow rate: 2 to 4 BV/h

*1 BV (Bed Volume) = 1 m³ solution per m³ of resin

Selectivity

The apparent selectivity of any ion exchange resin for a given metal depends upon concentration, the presence of other species, and pH. Generally, the selectivity follows the order: Na⁺ << Ca²⁺ < Mn²⁺ < Fe²⁺ < Co²⁺ < Cd²⁺ < Zn²⁺ < Ni²⁺ < Pb²⁺ < Cu²⁺ < Hg²⁺ < Fe³⁺. The affinity for H⁺ at pH 4 is situated between Pb²⁺ and Cu²⁺. For metals with selectivities less than Cu²⁺, the resin should be in the salt form (e.g., Na⁺ form) to minimize metal leakage. At a pH of 2, the resin will be extensively in the H⁺ form and will efficiently remove Fe³⁺, Cu²⁺, and Hg²⁺.

Applications

• Purification of brine in the chloralkali industry
• Electronics industry (printed wiring boards)
• Purification of process streams containing trace metals
• Electroplating industry
• Recovery of heavy metals from hydrometallurgical leach streams

Hydraulic Characteristics

• Bed expansion is shown as a function of backwash flow rate and temperature (see Figure 1 in original document).
• Pressure drop profile in brine is provided (see Figure 2 in original document).

Limits of Use

AMBERLITE IRC748 is suitable for industrial uses. For specific applications such as pharmaceutical, food processing, or potable water applications, it is recommended to seek advice from Rohm and Haas. All products are produced in ISO 9002 certified manufacturing facilities.

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