Dowex MR-3 mixed

Summary

Product identification

DOWEX MR-3 LC NG is a mixed ion exchange resin designed for demineralization in nuclear and high purity water applications. It is a 1:1 equivalent mixture of DOWEX HGR NG (H⁺ form cation) and DOWEX SBR LC NG (OH⁻ form anion) resins.

Key Features

• High purity cation and anion components for high-quality water production.
• Suitable for radwaste treatment, pond water treatment, reactor coolant cleanup, and high purity mixed-bed demineralization.
• Residual chloride and sulfate levels are each less than 0.1% of the total ionic sites of the anion resin.

Guaranteed Sales Specifications

OH⁻ form

• Total exchange capacity: min. 1.2 eq/l (26.2 kgr/ft³ as CaCO₃)
• Water content: 60% max.
• Bead size distribution (>1.2 mm, max.): 2%
• Bead size distribution (<0.42 mm, max.): 1%
• Bead size distribution (<0.3 mm, max.): 0.2%
• Whole uncracked beads: min. 95%
• Crush strength (Average, min.): 350 g/bead
• Crush strength (>200 g/bead, min.): 95%

H⁺ form

• Total exchange capacity: min. 2.0 eq/l (43.7 kgr/ft³ as CaCO₃)
• Water content: 46 - 52%
• Bead size distribution (>1.2 mm, max.): 2%
• Bead size distribution (<0.42 mm, max.): 1%
• Bead size distribution (<0.3 mm, max.): 0.1%
• Whole uncracked beads: min. 95%
• Crush strength (Average, min.): 500 g/bead
• Crush strength (>300 g/bead, min.): 95%

Ionic Conversions

• Cation resin (H⁺): 99.7% min.
• Anion resin (OH⁻): 95% min.
• Anion resin (Cl⁻): 0.1% max.
• Anion resin (CO₃²⁻): 5% max.
• Anion resin (SO₄²⁻): 0.1% max.

Trace metals (ppm dry resin, max.)

Product Composition

• Resin Ratio: 1:1 by equivalents (cation:anion)
• Matrix: Styrene-DVB, gel
• Functional group: Sulfonic acid (cation) and quaternary amine (anion)

Recommended Operating Conditions

• Maximum operating temperature: 60°C (140°F)
• pH range: 0-14
• Bed depth, min.: 800 mm (2.6 ft)

Typical Physical and Chemical Properties

Packaging

• 50 liter or 5 cubic feet fiber drums.

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