Macroporous Selective Chelating Resin
Functionalized macroporous chelating resins with Iminodiacetic Acid (D403) and Aminophosphonic Acid (D404) ligands for high-selectivity capture of transition heavy metals (Cu²⁺, Ni²⁺, Zn²⁺, Co²⁺) and trace alkaline-earth hardness (Ca²⁺, Mg²⁺) in concentrated chlor-alkali brine.
Polymer Architecture & Functional Chemistry Profile
Chelating Resin · 2 Standardized & Specialty GradesPolymer Matrix
Styrene-DVB Copolymer
Bead Architecture
Macroporous Chelating
Active Functional Group
Iminodiacetic / Aminophosphonic
Chemical Site / Formula
R–N(CH₂COO⁻)₂ / –CH₂PO₃²⁻
Standard Ionic / Pore Form
Na⁺
Key Benchmark
ppb-Level Heavy Metal & Brine Selectivity
Lot-specific COA issued per shipment
CHELATING RESIN · LABORATORY & PRODUCTION SPECIFICATIONS
Grade-by-Grade Technical Parameter Table
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Macroporous Selective Chelating Resin — Physical & Chemical Specifications
R–N(CH₂COO⁻)₂ / –CH₂PO₃²⁻ · Styrene-DVB · Macroporous Chelating · 2 Grades| Grade | Ionic Form | Mass Capacity (mmol/g, dry) | Volume Capacity (mmol/mL) | Water Retention (%) | Bulk Density (g/mL) | Specific Gravity (g/mL) | Particle Size Range (%) | Effective Size (mm) | Uniformity Coeff. | Whole Bead After Attrition (%) | Reversible Swelling | Color | Functional Group & Selective Applications | TDS / RFQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D403 | Na⁺ | 1.95 (Cu²⁺) | 0.6 (Cu²⁺) | 50–60 | 0.72–0.80 | 1.13–1.22 | (0.315–1.250 mm) ≥95 | 0.4–0.7 | ≤1.6 | ≥90 | H⁺ -> Na⁺ <40 | Light yellow to light grey opaque spherical beads | Macroporous iminodiacetic acid (IDA) chelating resin with high selectivity for polyvalent metal ions; used for heavy metal wastewater polishing, hydrometallurgical separation, and brine refining | |
| D404 | Na⁺ | 1.45 (Ca²⁺) | 0.5 (Ca²⁺) | 52–60 | 0.72–0.78 | 1.12–1.40 | (0.315–1.250 mm) ≥95 | 0.4–0.7 | ≤1.6 | ≥90 | H⁺ -> Na⁺ <40 | Grey-brown opaque spherical beads | Macroporous aminophosphonic acid chelating resin with strong selective adsorption of Ca²⁺ and Mg²⁺; mainly used for secondary chlor-alkali brine softening and refining to ppb levels |
Note: Selectivity order for D403: Cu²⁺ > Pb²⁺ > Ni²⁺ > Zn²⁺ > Co²⁺ > Cd²⁺ > Fe²⁺ > Mn²⁺ > Ca²⁺ >> Na⁺. Batch COA supplied with every shipment
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