Desiccants Molecular Sieve 4A for Air Compressor Natural Gas Drying Manufacturer

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Product Inroduction: Desiccants Molecular Sieve 4A for Air Compressor Natural Gas Drying Manufacturer

Technical Parameter:

Model4A
ColorLight gray
Nominal   pore diameter4 angstroms
ShapeSpherePellet
Diameter   (mm)1.7-2.5 (8*12   mesh)3.0-5.0 (4*8   mesh)1.6   (1/16 inch)3.2   (1/8 inch)
Size   ratio up to grade (%)≥98≥98≥96≥96
Bulk   density (g/ml)≥0.70≥0.70≥0.68≥0.68
Wear   ratio (%)≤0.20≤0.20≤0.40≤0.40
Crushing   strength (N)≥35/piece≥85/piece≥30/piece≥70/piece
Static H2O adsorption (%)≥21.5≥21.5≥21.5≥21.5
Static methanol adsorption(%)≥15≥15≥15≥15
Water   content (%)≤1.5≤1.5≤1.5≤1.5
Typical Chemical FormulaNa2O . Al2O3 . 2SiO2 . 4.5 H2O
(SiO2 : Al2O3 ≈2）
Typical Applicationa) Drying and removing of CO2 from natural gas,   LPG, air, inert and atmospheric gases, etc.
b) Removal of hydrocarbons,   ammonia and methanol from gas streams (ammonia syn gas treating)
c) Special types are used in the   air break units of buses, trucks and locomotives.
d) Packed in small bags, it   may be used simply as a packaging desiccant.
Warranty:a) By National Standard HGT 2524-2010
b) Offer lifetime   consultation on problems occurred

1. What is 4A molecular sieve?

4A molecular sieve is a type of synthetic zeolite (sodium aluminosilicate) with a uniform pore size of approximately 4 angstroms (0.4 nm). It selectively adsorbs molecules with a kinetic diameter less than 4Å, such as water, CO2, NH3, and H2S.

2. Chemical Composition and Structure of 4A Molecular Sieve

Chemical Formula: Na2O·Al2O3·4.5SiO2·4.5H2O (Sodium form of Type A zeolite)

Crystal Structure: Cubic system with regular channels and cavities suitable for adsorbing molecules up to 4 Å in diameter.

Cation Type: Na+ ions at cationic sites define the effective pore size of 4 Å.

3. Properties of 4A Molecular Sieve

Property                         Parameter/Description

Pore Size                        0.4 nm (4 Å)

Surface Area                  600–800 m²/g

Adsorption Capacity     20–22% by weight (for water)

Thermal Stability            Up to 600°C

Chemical Stability          Stable in pH 5–11 environment

Physical Form                 Beads, pellets, or powder

4. Adsorption Characteristics of 4A Molecular Sieve

– Adsorbable Molecules:

Water (H2O) – Excellent adsorption

Ammonia (NH3)

Carbon Dioxide (CO2)

Sulfur Dioxide (SO2)

Ethanol and methanol

– Non-Adsorbable Molecules:

Unsaturated hydrocarbons like propylene and butylene

Aromatic compounds (due to larger size)

Key Point: 4A molecular sieve is suitable for general purpose drying and selective adsorption of small polar molecules.

5.Major Applications of 4A Molecular Sieve

Air and gas drying: Used in compressed air systems, refrigerants, and natural gas dehydration.

Solvent drying: Effective for alcohols and esters.

Packaging desiccant: Protects moisture-sensitive goods.

Catalyst support: Used in petrochemical processes.

Plastic and polymer additives: Moisture scavenger in polyurethane and coatings.

6. Comparison: 3A vs 4A vs 5A Molecular Sieves

Type     Pore Size (Å)       Cation      Primary Applications

3A       3 Å               K+         Adsorbs water only

4A       4 Å               Na+        Adsorbs H2O, CO2, NH3, alcohols

5A       5 Å               Ca2+       Adsorbs normal paraffins, O2/N2 separation

Core Advantage of 4A: More versatile than 3A, ideal for drying and purification where slightly larger molecules must be adsorbed.

7. Regeneration Methods for 4A Molecular Sieve

Thermal Regeneration: Heating at 250–300°C under dry air or inert gas

Vacuum Regeneration: Lowering pressure to release adsorbed water

PSA Systems: Used in cyclic adsorption/desorption processes

Lifespan: Reusable hundreds of times if properly regenerated and not exposed to contaminants.

8.Storage Instructions

Store in a dry, sealed container to avoid moisture pickup.

Keep away from acidic gases and volatile organics.

9. Is 4A molecular sieve safe and environmentally friendly?

Yes. It is non-toxic, non-corrosive, and RoHS/REACH compliant. It can be regenerated or safely disposed of as industrial waste.

10. Does 4A molecular sieve remove CO2?

Yes. Unlike 3A, 4A can adsorb CO2, making it suitable for applications like gas purification and air drying.

11. How is 4A different from silica gel?

4A has a uniform pore size and stronger adsorption at low humidity, while silica gel is less selective and performs better at higher humidity levels.

12. Can I use 4A molecular sieve for ethanol dehydration?

Yes, 4A is effective for ethanol drying but may adsorb some ethanol. For higher selectivity in water removal, 3A is preferred for fuel-grade ethanol production.

Factory Introduction

Molecular Sieve Manufacturer

We Ensure Quality Control

– Strict SOPs implemented by experienced technicians
– Regular sampling and lab testing throughout production
– Retained sample storage for 5 years for traceability
– Final inspection before shipment to ensure compliance with technical standards

SienChem Technology Co., Ltd, founded in 2019, specializes in the production and marketing of molecular sieve, activated molecular sieve powder, and activated alumina for industrial use. Our products serve applications such as gas purification, water treatment, and air separation. Located in Anhui, our factory produces 8,000 tons annually and operates under the ISO 9001 quality management system. We maintain a modern lab and quality control center staffed by 8 engineers and 12 technicians. 

Molecular Sieve Manufacturer

Frequently Asked Questions

Frequently Asked Question

Our factory specializes in the manufacturing of molecular sieve products, including:
Molecular Sieve Powder (Activated)
Molecular Sieve Beads and Pellets (3A, 4A, 5A, 13X)
Activated Alumina
These are widely used in gas drying, solvent recovery, air separation, polyurethane systems, coatings, and more.

Our factory has an annual capacity of 8,000 tons of molecular sieve, with advanced dehydration and activation equipment, ensuring consistent quality and large-scale supply for both domestic and international clients.

Yes, we provide OEM, ODM, and private labeling services based on customer needs, including customized packaging, branding, and technical formulation support.

Yes, for every batch we supply a Certificate of Analysis (COA) and Technical Data Sheet (TDS), including information on moisture adsorption, particle size,bulk density, and etc.

– Strict SOPs implemented by experienced technicians
– Regular sampling and lab testing throughout production
– Retained sample storage for 5 years for traceability
– Final inspection before shipment to ensure compliance with technical standards
– Third party inspection such as SGS or ClQ is acceptable.

Yes, free samples (500g–1kg) are available for quality testing and formulation trials. Shipping costs may be covered by the customer and refund to next order.

Yes, we are manufacturer. You are very welcome to visit our factory! We encourage customer visits to see our production process, quality control system, and laboratory facilities firsthand. Please contact us in advance to arrange the schedule—we’ll be happy to provide airport pickup, hotel booking assistance, and a full factory tour. We look forward to meeting you in person and building a long-term partnership. 

Our standard payment terms are flexible to meet customer needs. Common options include:
– T/T (Telegraphic Transfer): 30% deposit in advance, 70% balance before shipment
– L/C (Letter of Credit): Available for large or long-term orders
– Negotiable terms: For trusted or repeat customers, we can discuss more favorable terms
– Other options: PayPal, or RMB payments for sample orders or small quantities

Our standard MOQ is 1000 kg for most molecular sieve products. However, for trial orders, samples, or new customers, we can be flexible and accept smaller quantities, such as 450 kg (one pallet). We’re happy to support your testing or initial market development before larger purchases.

Normally regular products are in stock.

– Standard orders: 7–10working days
– Custom orders: 12–15 working days
Delivery time depends on order quantity and packaging requirements.

We offer:
– 15kg/ carton box
-150kg /steel drum
-1000kg/jumbo bag
– Custom packaging available upon request
All packaging is moisture-proof and sealed to maintain product performance.

Yes, our technical team can provide formulation advice, compatibility testing, and usage guidelines to help integrate our molecular sieve powder into your system effectively.

Yes, we offer competitive pricing and volume-based discounts. The final price depends on factors such as order quantity, packaging requirements, and payment terms. For regular or bulk customers, we’re happy to provide special pricing or long-term cooperation discounts.

We take after-sales service seriously and are committed to long-term customer satisfaction. For all molecular sieve products, we provide:
Technical support for product application, usage guidance, and troubleshooting
Follow-up service to ensure product performance meets your expectations
Free replacement or compensation for any confirmed quality issues
Responsive communication, with inquiries replied to within 24 hours
Document support including COA, MSDS, TDS, and RoHS/REACH certifications as needed

Yes. Our molecular sieve powders are non-toxic, odorless, and recyclable after regeneration. They are safe for use in industrial and consumer applications.

You can contact our sales team via email or phone with your specific requirements (grade, quantity, packaging). We will respond with a detailed quotation within 24 hours.

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