Explore our premium grade molecular sieves, silica gels, and activated aluminas engineered for optimal industrial dehydration performance.
A technical examination of pore sizes, synthetic zeolite structures, and chemical compatibility in eco-friendly refrigeration loops.
Molecular Sieve XH-9 is a highly specialized synthetic zeolite with a crystalline aluminosilicate framework. Optimized with a target pore diameter of approximately 3 Ångstroms (3Å), it is precisely calibrated to allow water molecules (kinetic diameter ~2.65 Å) to enter and be strongly adsorbed within its internal cavity system. Crucially, it excludes common refrigerant molecules which possess larger kinetic diameters, preventing co-adsorption.
With the rapid global shift towards green refrigerants, traditional desiccants like XH-5 or XH-7 are no longer sufficient. Modern eco-friendly systems utilize refrigerants such as R-134a, R-407C, R-410A, and hydrofluoroolefins (HFOs) like R-1234yf. These refrigerants exhibit distinct molecular configurations and polar behaviors. Molecular Sieve XH-9 is specifically engineered to offer high chemical compatibility, low chemical reactivity, and high crush strength to ensure long-term stability in these demanding environments.
By preventing catalytic decomposition of the refrigerant and minimizing dust generation through high attrition resistance, XH-9 protects compressors from acid damage, capillary blockage, and premature mechanical wear.
Standard specifications for industrial-grade XH-9 molecular sieves:
How Shanghai Jiuzhou Chemicals utilizes structural cost efficiency, advanced automation, and key maritime hubs to power global distribution networks.
We source key aluminosilicate compounds and binder precursors directly from leading domestic mineral fields. This reduces transportation overheads and insulates our pricing from global raw material volatility.
Our continuous rotary kilns are equipped with automatic temperature feedback controllers. This guarantees uniform calcination, consistent pore distribution, and optimized active surface areas across every batch.
With factories in Shanghai and Wuxi, we sit next to the busiest shipping terminals in China. This proximity lowers inland logistics costs and ensures rapid transit to the Americas, Europe, and Southeast Asia.
A trusted global leader in synthetic zeolites, activated alumina, and industrial desiccant materials since 1994.
Shanghai Jiuzhou Chemicals Co., Ltd. is located in the major economic development city of Shanghai. Over the years, Jiuzhou has adhered to the principles of "quality control and innovation," committing itself to the development, research, and manufacturing of high-quality innovative chemical products. Our main catalog includes various molecular sieve powders, molecular sieves, activated powder, activated alumina, aluminum oxide catalysts, different types of alumina packing and ceramic balls, sodium silicates, aluminum hydroxide, zeolite 4A, sodium carbonates, SLES, and more. Our entire manufacturing operation has passed the ISO9001: 2008 quality management system certification, along with TUV & SGS certifications.
Jiuzhou features a professional, world-class research team and resources. We utilize advanced international production technologies and professional production equipment, designed in line with national safety and environmental standards. Our central laboratory is equipped with high-precision analytical instruments for real-time monitoring and analysis. In terms of quality control, Jiuzhou ensures that all finished items comply with strict international standards.
Our technical strength and industrial reputation lead the field of desiccant chemistry. Backed by dynamic testing laboratories and automated multi-functional production workshops, we have established a highly efficient operating system. Joozeo products are exported globally, with distribution channels spanning the United States, Southeast Asia, Japan, Europe, North and South America, and the Middle East. We provide partners with stable products, customizable sizing, and energy-saving, environmentally responsible adsorption solutions.
We maintain a rigorous focus on quality and innovation across all production cycles.
Equipped with computerized automation systems, environmental controls, and high-efficiency packaging lines.
Serving as our core technology and synthesis center, the Shanghai plant specializes in raw crystalline zeolite formulation and high-speed bead formatting. It features full automation and strict QA labs.
Our thermal processing and custom packaging center. The Wuxi facility houses multiple rotary drying ovens and dust-free packaging rooms to ensure desiccants maintain a low Loss on Ignition (LOI) before deployment.
We actively participate in drafting national and industrial guidelines, verifying the quality and reliability of our molecular sieves.
Adsorption compressed air dryers for general industrial applications.
Activated aluminum oxide for industrial use standards.
Refrigeration compressed air dryers for general use.
Compliance and testing protocols for machinery manufacturing.
Chemical safety and testing limits for performance adsorbents.
Green development standards for eco-friendly manufacturing.
Better Air, Better Life. We implement energy-efficient production methods to reduce waste and lower emissions.
In commercial refrigeration, system requirements vary widely by climate zone. For instance, cold chains in tropical areas require molecular sieves with high static water capacity to handle high humidity. Alternatively, systems in northern climates demand high physical stability to withstand rapid thermal shifts.
To meet these needs, we supply molecular sieve XH-9 with customized pore sizes and physical dimensions (beads, pellets, or custom extruded shapes). We work closely with OEMs in Europe, the Americas, and Asia to pre-bake the desiccant and seal it in specialized airtight containers. This step minimizes ambient moisture exposure before assembly, preserving maximum adsorption capacity for installation.
International chemical procurement requires careful regulatory compliance. Our molecular sieve XH-9 products comply with the European REACH regulations, RoHS directives, and US EPA guidelines.
Each batch is shipped with a Certificate of Analysis (COA) detailing its specific crush strength, dust index, static water capacity, and loss on ignition (LOI). By maintaining strict batch traceability, we help global buyers meet industrial compliance audits and ensure consistent manufacturing quality.
The desiccant market is evolving alongside global efforts toward carbon neutrality. Modern refrigeration systems focus on minimizing refrigerant loss and using low-GWP (Global Warming Potential) gases. Because these new refrigerants are more reactive, they require highly stable desiccants like XH-9.
In response, we are investing in advanced crystalline binder formulations to reduce binder ratio and maximize the density of active zeolite sites. This research aims to create more compact filtration cartridges, helping OEMs design smaller, lighter, and more energy-efficient refrigeration systems.
Technical guidance and answers for process engineers, purchasing directors, and refrigeration technicians.
Molecular Sieve XH-7 is designed for standard refrigerants like R-22 and R-134a in stationary refrigeration systems. In contrast, XH-9 features optimized chemical compatibility and higher physical durability. It is engineered for newer refrigerants and HFO mixtures (such as R-1234yf), making it highly suitable for automotive air conditioning systems and high-vibration commercial setups.
With a precise pore size of ~3 Ångstroms, the zeolite structure allows water molecules (diameter ~2.65 Å) to enter the crystal structure. Refrigerant molecules (typically >4 Å) cannot enter. This selectivity prevents the catalytic reactions, polymerization, or decomposition of the refrigerant that can occur with larger-pore desiccants.
We supply XH-9 molecular sieves in airtight, nitrogen-flushed steel drums (typically 55 gallons/150 kg), heavy-duty cardboard drums, or hermetically sealed boxes. This robust packaging protects the desiccants from atmospheric moisture during transit and long-term storage.
Yes, XH-9 molecular sieves can be regenerated by thermal desorption. This is typically done by passing a dry purge gas through the bed at temperatures between 200°C and 300°C. In hermetically sealed refrigeration circuits, however, the molecular sieve is typically housed inside a filter drier cartridge and replaced during system maintenance.
Explore our specialized range of desiccants, catalysts, and active carbon products designed for water treatment, air purification, and petrochemical processing.
Have questions about technical specifications, custom pore sizing, bulk packaging, or shipping schedules? Contact our technical team today. We respond within 24 hours.
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