Activated alumina is a highly versatile adsorbent and desiccant, indispensable in numerous industrial applications ranging from gas drying and air purification to water treatment. For purchasing managers, R&D scientists, and product formulators, understanding the nuances of different activated alumina products is key to making an informed purchase decision. As a leading activated alumina manufacturer and supplier in China, NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to guiding you through the selection process to ensure you acquire the optimal product for your specific needs.

Understanding Activated Alumina Basics

At its core, activated alumina is a synthetically produced, highly porous form of aluminum oxide (Al2O3). Its exceptional adsorptive properties are due to its vast internal surface area, often exceeding 300 m²/g. This structure allows it to effectively trap moisture, polar molecules, and various impurities. The 'activation' process involves carefully heating aluminum hydroxide to create this porous network, enhancing its performance as a desiccant and adsorbent.

Key Specifications to Consider When You Buy Activated Alumina:

When evaluating activated alumina products, several technical specifications are critical:

  • Alumina Content (Al2O3 %): High alumina content, typically ≥92%, is indicative of a pure and effective adsorbent. Variations in Al2O3 can affect adsorption capacity and chemical stability.
  • Particle Size: Activated alumina is commonly available in granular or bead form, with sizes ranging from 1-7 mm. The most common sizes for industrial applications include 2-5 mm (1/8 inch), 4-8 mm (3/16 inch), and 5-10 mm (1/4 inch). The choice of particle size depends on the application, such as the design of drying towers, pressure drop requirements, and contact time needed. For example, smaller beads offer a higher surface area but can increase pressure drop, while larger beads reduce pressure drop.
  • Surface Area (m²/g): This metric directly correlates with adsorption capacity. Higher surface areas (e.g., ≥300 m²/g) generally mean more effective moisture or contaminant removal.
  • Pore Volume (ml/g): A larger pore volume also contributes to higher adsorption capacity.
  • Crushing Strength (N/Piece): For applications involving mechanical stress or high pressure, good crushing strength is essential to prevent attrition and the generation of fines.
  • Static Adsorption Value: This indicates the amount of water the activated alumina can adsorb under specific relative humidity conditions (e.g., 17-19% water absorption at RH=60%).
  • Impurities: Low levels of impurities like SiO2, Fe2O3, and Na2O are crucial for maintaining the inertness and performance of the activated alumina.

Common Applications and Corresponding Activated Alumina Choices:

  • Compressed Air Dryers: Typically use 2-5 mm (1/8') activated alumina beads for optimal performance and to achieve very low dew points.
  • Water Purification (Fluoride/Arsenic Removal): Often utilizes 4-8 mm (3/16') or 5-10 mm (1/4') beads to manage flow rates and bed depths effectively.
  • Catalyst Carriers: Particle size and surface properties are key, with custom specifications often required.
  • Gas Drying (e.g., Natural Gas): Can use various bead sizes depending on pipeline specifications and pressure drop considerations.

Why Partner with NINGBO INNO PHARMCHEM CO.,LTD. as Your Activated Alumina Manufacturer?

When you decide to buy activated alumina, selecting a reliable manufacturer and supplier is crucial. NINGBO INNO PHARMCHEM CO.,LTD. offers:

  • High-Quality Product Assurance: Our activated alumina is manufactured to strict specifications, ensuring consistent performance for your critical applications.
  • Competitive Activated Alumina Pricing: As a direct manufacturer, we provide cost-effective solutions, especially for bulk purchases, allowing you to optimize your procurement budget.
  • Expert Technical Support: Our team is equipped to help you understand the technical specifications and choose the right activated alumina for your unique industrial needs.
  • Reliable Supply Chain: We ensure timely delivery and a consistent supply, supporting the uninterrupted operation of your processes.

Making the right choice for activated alumina involves understanding its technical attributes and how they align with your application's demands. NINGBO INNO PHARMCHEM CO.,LTD. is committed to being your trusted source for premium activated alumina. Contact us today to explore our product range and to receive a detailed quotation for your purchase requirements.