Purolite A400

Summary

Product identification

Purolite A400 is a polystyrenic gel, Type I strong base anion resin in chloride form.

Typical Physical & Chemical Characteristics

• Polymer Structure: Gel polystyrene crosslinked with divinylbenzene
• Appearance: Spherical Beads
• Functional Group: Type I Quaternary Ammonium
• Ionic Form: Cl⁻
• Total Capacity: 1.3 eq/L (28.4 Kgr/ft³) (Cl⁻ form)
• Moisture Retention: 48 - 54 % (Cl⁻ form)
• Particle Size Range: 300 - 1200 µm
• < 300 µm (max.): 1 %
• Uniformity Coefficient (max.): 1.7
• Reversible Swelling, Cl⁻ → OH⁻ (max.): 20 %
• Specific Gravity: 1.08
• Shipping Weight (approx.): 680 - 715 g/L (42.5 - 44.7 lb/ft³)
• Temperature Limit (Cl⁻ form): 100 °C (212.0 °F)
• Temperature Limit (OH⁻ form): 60 °C (140.0 °F)

Principal Applications

• Demineralization - Industrial
• Silica Removal

Advantages

• High operating capacity
• Efficient regeneration
• Good kinetic performance

Hydraulic Characteristics

Backwash

During up-flow backwash, the resin bed should be expanded between 50 and 70% for at least 10 to 15 minutes. Proper bed expansion helps remove particulate matter, clear bubbles and voids, and reclassify resin particles, minimizing flow resistance. Initial service startup may require approximately 30 minutes of expansion for bed classification. Bed expansion is influenced by flow rate and influent fluid temperature. Caution is advised to prevent resin loss due to over-expansion.

Pressure Drop

The pressure drop across an ion exchange resin bed is dependent on particle size distribution, bed depth, void volume, flow rate, and influent solution viscosity. Factors such as filtered particulate matter, abnormal resin compressibility, or incomplete bed classification can lead to increased head loss. Service flow rates can range from 10 to 40 BV/h, depending on influent water quality, application, and plant design.

Regulatory Approvals

• IFANCA Halal Certified
• LPPOM MUI Halal Certified
• Kosher Certified

Typical Packaging

• 1 ft³ Sack
• 25 L Sack
• 5 ft³ Drum (Fiber)
• 1 m³ Supersack
• 42 ft³ Supersack

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