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Highly selective chelating resin with iminodiacetate functional groups for preferential binding of heavy metal cations.
Excellent chemical and physical stability across broad pH range (1–12), enabling robust performance in aggressive process streams.
Fast kinetics and high exchange capacity for transition metals including Cu²⁺, Ni²⁺, Zn²⁺, and Co²⁺.
Low pressure drop and uniform spherical bead structure ensure consistent hydraulic performance in fixed-bed and moving-bed systems.
Regenerable with dilute acid solutions (e.g., 5% H₂SO₄ or HCl), supporting sustainable closed-loop operation.
Heavy metal removal from industrial wastewater in electroplating and metal finishing facilities.
Recovery of valuable metals (e.g., copper, nickel) from leachates in hydrometallurgical processes.
Pretreatment of feed water for boiler systems to prevent heavy metal-induced corrosion and scaling.
Polishing step in semiconductor-grade ultrapure water (UPW) production to meet stringent trace metal specifications.
Decolorization and metal ion scavenging in pharmaceutical and fine chemical synthesis effluents.
| Chemical Type | Chelating cation exchanger — iminodiacetate functionalized polystyrene-divinylbenzene matrix |
| Product Form | Moist, spherical beads (sodium form supplied) |
| Appearance | Light beige to pale yellow, translucent beads |
| Particle Size Range | 300–1200 µm (95% retained on 16 mesh, passes 50 mesh) |
| Moisture Content | 45–50% (as shipped) |
| Ion Exchange Capacity (total) | ≥ 2.0 eq/L (dry resin) / ≥ 0.9 eq/L (volumetric, as shipped) |
| pH Stability Range | 1–12 (short-term exposure up to pH 13 possible) |
| Maximum Operating Temperature | 100 °C (continuous), 120 °C (short-term) |
Q1: What is the primary functional group and ion exchange mechanism of LEWATIT PH 7061?
A: LEWATIT PH 7061 is a strongly acidic cation exchange resin based on a sulfonated polystyrene-divinylbenzene matrix. It operates via reversible H⁺/Na⁺ (or other cation) exchange in aqueous systems, enabling effective removal or selective substitution of metal cations during processing.
Q2: Is LEWATIT PH 7061 suitable for food-grade or pharmaceutical applications?
A: LEWATIT PH 7061 is designed for industrial water treatment and process purification. While it meets general regulatory expectations for polymer-based ion exchangers used in indirect contact scenarios, formal food-contact or pharmaceutical-grade certification (e.g., USP, EP, or FDA-listed status) is not claimed for this specific grade. Customers requiring such compliance should consult Lanxess technical support for appropriate certified alternatives.
Q3: How does LEWATIT PH 7061 differ from standard gel-type strong acid cation resins?
A: PH 7061 features a macroporous structure, offering enhanced physical stability, superior resistance to organic fouling, and consistent performance across variable pH and temperature conditions compared to conventional gel-type resins. This makes it especially suited for challenging feed streams containing oxidants, suspended solids, or moderate levels of natural organic matter.
Q4: What regeneration protocol is recommended for optimal service life?
A: Regeneration is typically performed using a 2–6% w/w sodium chloride solution at ambient temperature. Flow rate, contact time, and rinse volume should be optimized based on system design and service cycle requirements. Acid regeneration (e.g., with dilute HCl or H₂SO₄) is possible but generally reserved for specialized applications requiring full H⁺ form recovery.
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