Datasheet summary
Amberlyst A21
PDF datasheet mirror for Amberlyst A21 (Rohm & Haas). Verify with OEM before design.
Summary
Product identification
- Product Name: AMBERLYST A21
- Type: Industrial Grade Weakly Basic Polymeric Resin
- Form: Bead form
- Ionic form as shipped: Free Base (FB)
AMBERLYST A21 is designed for the removal of acidic materials from product streams. It can be used for removing acidic materials from organic solvents and for removing phenol from benzene and inhibitors (hydroquinone (HQ), hydroquinone mono-ethyl ether (MEHQ), tertiary butyl catechol (TBC)) from monomers. It is also used in the adsorption of SO₂ from gas streams.
Properties
- Physical form: Opaque spherical beads
- Concentration of active sites: ≥ 1.30 eq/L; ≥ 4.6 eq/kg
- Moisture holding capacity (FB form): 54 to 60 %
- Shipping weight: 660 g/L (41.2 lbs/ft³)
Particle size
- Harmonic mean size: 0.490 - 0.690 mm
- Uniformity coefficient: ≤ 1.80
- Fines content (< 0.300 mm): 1.0 % max
- Coarse beads (> 1.180 mm): 2.0 % max
Textural properties
- Nitrogen BET Surface area: 35 m²/g
- Average pore diameter: 110 Å
- Total pore volume: 0.10 cc/g
Shrinkage
- Water to phenol: 77 %
Suggested Operating Conditions (Chemical Processing)
- pH range: 0 to 14
- Maximum operating temperature: 100°C (210°F)
- Minimum bed depth: 600 mm (24 inches)
- Service flow rate: 8 to 40 BV/h (1 to 5 gpm/ft³)
Regeneration
- Regenerants: NaOH, NH₄OH, Na₂CO₃
- Flow rate (BV/h): 4 to 8
- Flow rate (gpm/ft³): 0.5 to 1.0
- Concentration (%): 2 to 4 (NaOH, NH₄OH); 4 to 8 (Na₂CO₃)
- Level: 120 % of ionic load
- Minimum contact time: 30 minutes
- Slow rinse: 2 BV (15 gal/ft³) at regeneration flow rate
- Fast rinse: 2 to 4 BV (15 to 30 gal/ft³) at service flow rate
Hydraulic Characteristics
Refer to the official PDF for Figures 1 (Bed expansion) and 2 (Pressure drop) which illustrate these characteristics as a function of backwash flow rate, service flow rate, and water temperature.
Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.