3A Potassium A
- Beads: 8×12 (≈1.6–2.4 mm), 4×8 (≈3–5 mm)
- Pellets: 1/16″ (≈1.6 mm), 1/8″ (≈3.2 mm)
- Powder: ~200 mesh (<75 µm)
- Use: Drying polar solvents; excludes H2O only
Molecular Sieves — Precision Moisture & Gas Control
Fast reference for popular zeolite grades used across drying, purification and gas separation.
For enquires, email us at sales@desicco.com.au
Jump to size tableWhat are molecular sieves?
Molecular sieves are synthetic zeolites with uniform pore sizes that selectively adsorb molecules by size and polarity. Common grades include 3A, 4A, 5A and 13X, each named for its approximate pore opening (≈3–10 Å). They’re widely used to dry gases and liquids, remove CO2/H2S, and purify process streams. Sieves are regenerable by heating or purging, making them reusable in PSA/TSA systems.
4A Sodium A
- Beads: 8×12 (≈1.6–2.4 mm), 4×8 (≈3–5 mm)
- Pellets: 1/16″ (≈1.6 mm), 1/8″ (≈3.2 mm)
- Powder: ~200 mesh (<75 µm)
- Use: General-purpose drying & purification
5A Calcium A
- Beads: 8×12 (≈1.6–2.4 mm), 4×8 (≈3–5 mm)
- Pellets: 1/16″ (≈1.6 mm), 1/8″ (≈3.2 mm)
- Use: Normal paraffin separation (PSA), drying, H2 cleanup
13X NaX / Zeolite X
- Beads: 8×12 (≈1.6–2.4 mm), 4×8 (≈3–5 mm), 10×18 (≈1–2 mm)
- Pellets: 1/16″ (≈1.6 mm), 1/8″ (≈3.2 mm)
- Use: Air pre-purification, CO2/H2S removal, gas drying
| Grade | Mesh Sizes (Beads) | Approx. mm Range | Other Forms |
|---|---|---|---|
| 3A | 8×12, 4×8 | 1.6–2.4 mm; 3–5 mm | Pellets 1/16″, 1/8″; Powder ~200 mesh |
| 4A | 8×12, 4×8 | 1.6–2.4 mm; 3–5 mm | Pellets 1/16″, 1/8″; Powder ~200 mesh |
| 5A | 8×12, 4×8 | 1.6–2.4 mm; 3–5 mm | Pellets 1/16″, 1/8″ |
| 13X | 8×12, 4×8, 10×18 | 1–2 mm; 1.6–2.4 mm; 3–5 mm | Pellets 1/16″, 1/8″ |
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About Desicco
Desicco is an Australian supplier of desiccants and adsorbents. We specialise in silica gel, molecular sieves and related products for packaging, industrial drying and gas purification.