Factory-direct supply of molecular sieves, alumina media, and tower packings engineered for petrochemical refineries, gas processing plants, and industrial water treatment systems globally.
Zeolite 3A (Type A synthetic crystalline potassium-aluminosilicate) represents the global standard for selective water co-adsorption. In an era defined by energy transition, strict dew-point requirements in natural gas pipelines, and zero-moisture tolerances in fuel ethanol production, selecting a reliable Chinese manufacturer with controlled pore-size distribution is vital to operating efficiency.
Pingxiang City in Jiangxi Province has evolved into China's central manufacturing cluster for environmental chemical packing, industrial ceramics, and synthetic zeolites. By consolidating high-purity kaolin clay reserves, synthetic binder synthesis, state-of-the-art rotary calcination kilns, and automated bead-forming lines within a single regional industrial zone, Chinese manufacturers like Pingxiang Zhongtai Environmental Chemical Packing Co., Ltd. (established in 2003) offer unmatched production scale, pricing efficiency, and quality consistency.
Global demand for fuel ethanol requires dehydration down to <0.5% v/v. Zeolite 3A's unique 3 Å pore size allows water molecules (2.6 Å) to enter while strictly excluding ethanol (4.4 Å), eliminating co-adsorption fuel losses.
Ethylene and propylene crackers rely on Zeolite 3A to dry cracked gas streams prior to cryogenic fractionation. Preventing hydrocarbon co-adsorption avoids green-oil formation and bed-polymarization downtime.
Architectural glass manufacturing demands zero moisture inside double-pane sealed units. Zeolite 3A desiccant prevents condensation, frost formation, and chemical fogging without trapping air or noble gases like Argon.
Synthesized by partial ion-exchange of potassium cations into a Type 4A (Sodium LTA) aluminosilicate framework, Zeolite 3A achieves an effective pore opening of approximately 3 Ångströms (0.3 nm). Understanding the underlying crystallographic structure is crucial for process engineers sizing fixed-bed adsorbers.
The chemical composition of premium Zeolite 3A is expressed as:
x K₂O · (1-x) Na₂O · Al₂O₃ · 2 SiO₂ · w H₂O (where x ≈ 0.40 – 0.45)
Because the potassium ion ($K^+$) possesses a larger ionic radius ($1.33 \text{ \AA}$) than the sodium ion ($Na^+, 0.98 \text{ \AA}$), substituting sodium with potassium narrows the pore windows of the LTA cage from $4 \text{ \AA}$ to $3 \text{ \AA}$. This precise size exclusion mechanism allows water to diffuse inside the supercage while rejecting larger hydrocarbons.
| Molecule Target | Kinetic Diameter (Å) | Adsorption Status on 3A Zeolite | Industrial Significance |
|---|---|---|---|
| Water (H₂O) | 2.65 Å | Fast Adsorption | Target molecule; achieves dew points below -100°C. |
| Helium / Hydrogen (He / H₂) | 2.60 Å | Co-Adsorbed (Minimal) | Used in trace gas drying under high pressure. |
| Carbon Dioxide (CO₂) | 3.30 Å | Excluded | Prevents CO₂ co-adsorption during natural gas dehydration. |
| Ethylene (C₂H₄) | 3.90 Å | Excluded | Prevents ethylene polymerization & bed coking. |
| Ethanol (C₂H₅OH) | 4.40 Å | Excluded | Enables liquid-phase and vapor-phase ethanol dehydration. |
From refinery cracked gas units to food-grade solvent purification, standardizing on premium Zeolite 3A extends bed operational lifecycles from 3 years up to 5-8 years under optimized thermal regeneration schedules.
In olefin cracking plants, moisture causes hydrocarbon hydrate formation in sub-zero fractionating columns. Zhongtai’s Zeolite 3A features low green-oil activity, high crush strength, and ultra-low dust, protecting cold-box heat exchangers from freeze-ups.
Conventional distillation cannot break the ethanol-water azeotrope (95.6% ethanol). Pressure Swing Adsorption (PSA) or Temperature Swing Adsorption (TSA) units filled with 3A beads dehydrate crude ethanol up to 99.9% purity for fuel blending.
Refrigeration systems utilizing HFCs and HCFCs (e.g., R-134a, R-410A) require deep drying to prevent valve icing and acid corrosion. Zeolite 3A desiccant cores selectively adsorb moisture without adsorbing the refrigerant gas.
Formulated with high initial moisture capacity and low static air adsorption, specialized 3A beads absorb water trapped inside sealed glass cavities, maintaining extreme low dew points (< -60°C) over decades of weathering.
Transparency in pricing and physical metrics allows procurement managers to balance performance vs. capital expenditure. Below is the technical baseline and realistic wholesale pricing breakdown from factory direct production.
| Property Parameter | Sphere Bead (4x8 Mesh) | Sphere Bead (8x12 Mesh) | Extrusate Pellet (1/16") | Extrusate Pellet (1/8") |
|---|---|---|---|---|
| Nominal Diameter | 3.0 – 5.0 mm | 1.6 – 2.5 mm | 1.5 – 1.7 mm | 3.0 – 3.2 mm |
| Bulk Density (g/ml) | ≥ 0.68 | ≥ 0.70 | ≥ 0.66 | ≥ 0.65 |
| Crush Strength (N) | ≥ 80 N / bead | ≥ 40 N / bead | ≥ 35 N / pellet | ≥ 55 N / pellet |
| Water Adsorption (25°C, RH 60%) | ≥ 21.0 wt% | ≥ 21.5 wt% | ≥ 21.0 wt% | ≥ 20.5 wt% |
| Attrition Rate (wt%) | ≤ 0.10 % | ≤ 0.12 % | ≤ 0.15 % | ≤ 0.15 % |
| Package Moisture (wt%) | ≤ 1.0 % | ≤ 1.0 % | ≤ 1.0 % | ≤ 1.0 % |
*Note: Prices vary depending on raw material costs, potassium exchange percentage, binder type (Clay vs. Binderless grade), and order volume. Contact sales for live quotes.
| Grade / Application | Order Tier (MOQ) | Packaging Type | FOB Price Estimate (USD/MT) |
|---|---|---|---|
| Standard Industrial Grade 3A | 1 – 5 Metric Tons | 25 kg Cartons / Drums | $1,350 – $1,650 / MT |
| Standard Industrial Grade 3A | > 20 Metric Tons (FCL) | 1000 kg Jumbo Super Sacks | $1,180 – $1,400 / MT |
| Ethanol Dehydration Specialty 3A | > 10 Metric Tons | Airtight Steel Drums (150kg) | $1,550 – $1,850 / MT |
| Insulated Glass High-Speed 3A | > 20 Metric Tons | 25 kg Vacuum Bags | $1,250 – $1,480 / MT |
At Pingxiang Zhongtai, quality control is executed at every manufacturing phase—from raw clay slurry analysis to final batch calcination in automated rotary kilns.
Every lot is tested according to international standard test methods: ASTM D4179 for single-pellet crush strength, ASTM D2854 for apparent bulk density, and HG/T 2524-2014 for static water adsorption.
We issue full Certificates of Analysis (COA) detailing exact moisture levels, bulk density, crush strength, and pore size integrity. You can file our data sheets directly into your plant's ISO quality management system.
Our Zeolite products comply with EU REACH registration standards, OSHA health safety norms, and heavy metal limit directives, enabling seamless customs clearance across Western markets.
Zeolite 3A is an aggressive moisture desiccant. If packaged incorrectly, it can adsorb atmospheric humidity during ocean transit, deactivating the media before it reaches your site. We use multi-layer barrier packaging to ensure zero activity loss.
150 kg net iron drums sealed with double gasket clamps and internal polyethylene liners. Recommended for overseas air/sea shipment where storage times exceed 6 months.
1000 kg ton bags equipped with aluminum foil barrier inner bags to prevent humidity ingress. Ideal for direct loading into refinery vessel hoppers via bottom discharge spouts.
Reinforced double-wall cardboard boxes containing vacuum-sealed PE inner bags. Perfect for plant maintenance teams needing manual handling access inside tight vessel spaces.
Common inquiries answered by our senior chemical engineers and export specialists.
Discover our broad selection of mass transfer, heat recovery, and catalytic support products manufactured in Pingxiang.
Need technical support for bed sizing, pressure drop calculations, or formal FOB/CIF price quotations? Contact our engineering sales team in Pingxiang today.
