Pseudo Boehmite | The Advanced Alumina Precursor for Next-Generation Catalysts & Materials | Catalysts & Functional Materials

The Strategic Starting Point for Engineered Alumina Performance

The journey to a high-performance alumina material often begins with a critical precursor: Pseudo Boehmite. Aogochem Pseudo Boehmite is a unique, highly dispersible form of aluminum oxyhydroxide (AlOOH·xH₂O) distinguished by its ultra-high specific surface area, tunable pore structure, and exceptional purity. Unlike fully crystalline boehmite, its “pseudo-crystalline” nature provides immense chemical reactivity and versatility. Upon controlled thermal activation, it transforms into high-surface-area transitional aluminas (γ, η) – the workhorse materials for catalysis and adsorption. This controlled transformation is the key to engineering final materials with precise acidity, porosity, and thermal stability. Beyond catalysis, its nano-scale particle size and excellent film-forming properties make it an outstanding raw material for ceramic coatings, including critical applications on lithium-ion battery separators. Whether you are developing a more selective catalyst, a safer battery, or a specialized ceramic component, Aogochem Pseudo Boehmite provides the foundational properties to engineer success from the ground up, offering a customizable platform for innovation in chemicals, energy, and advanced materials.

Technical Specifications & Engineering Controls

Our Pseudo Boehmite is produced under stringent conditions to deliver consistent and tailor-made physical-chemical properties.

Core Physical & Chemical Properties:

• Chemical Formula: AlOOH·xH₂O (x indicating variable water content)

• Crystalline Structure: Poorly crystalline or pseudo-crystalline, exhibiting broad X-ray diffraction (XRD) peaks, indicative of very small crystallite sizes and high surface energy.

• Purity (Al₂O₃ basis): Typically > 99%, with low impurity levels (Na₂O, Fe₂O₃, SiO₂ each < 0.01% for high-grade products).

• Specific Surface Area (SSA, BET): Extremely high, ranging from 200 m²/g to over 400 m²/g. This is one of its defining characteristics and is directly correlated to the activity of derived catalysts.

• Pore Volume: Large and adjustable, typically between 0.3 mL/g to 1.2 mL/g, with a dominant mesoporous (2-50 nm) structure ideal for molecular diffusion in catalytic reactions.

• Particle Morphology: Appears as loosely aggregated nanoplatelets or fibrous nanocrystals under electron microscopy, which contribute to its high SSA and excellent peptization behavior.

• Peptization Behavior: Can be easily peptized (dispersed into a stable colloidal sol) using dilute acids (e.g., HNO₃, HCl). This property is crucial for forming extrudable pastes for catalyst shaping or uniform coatings.

• Thermal Transformation: Dehydrates upon heating, converting to high-surface-area γ-Al₂O₃ around 400-500°C, and subsequently to other transitional phases before forming α-Al₂O₃ above 1100°C. The SSA and porosity of the intermediate phases are inherited from the Pseudo Boehmite precursor.

Available Grades & Forms:

• Powder Grades: Dry, free-flowing powders with different SSA/pore volume combinations for catalyst formulation and ceramic processing.

• Slurry/Dispersion Grades: Aqueous or solvent-based dispersions with controlled solids content and viscosity, ready for coating applications like battery separators.

Strategic Applications Across Key Industries

1. Catalyst & Adsorbent Manufacturing (Primary Application):

• Use: As the preferred precursor for gamma-alumina (γ-Al₂O₃) catalyst supports and adsorbents. It is peptized, shaped (via extrusion, bead-forming, or spray-drying), and calcined.

• Benefit: Produces supports with exceptionally high and stable surface area, tailored pore size distribution, and controlled acidity. This is fundamental for catalysts in hydrotreating, reforming, catalytic cracking (FCC), and dehydration reactions in the petrochemical and refining industries.

2. Lithium-Ion Battery Separator Ceramic Coatings:

• Use: As a key component in aqueous ceramic coating slurries applied to polyolefin separators.

• Benefit: Its nano-platelet morphology and easy dispersion allow for the formation of uniform, porous, and adherent ceramic layers. These coatings significantly improve the separator's heat resistance (prevents thermal shrinkage), electrolyte wettability, and overall battery safety and cycle life.

3. Binders & Carriers for Specialty Catalysts:

• Use: As an inorganic binder to provide mechanical strength to formulated catalyst tablets or as a washcoat carrier to adhere active components (e.g., zeolites, precious metals) onto monolithic substrates for automotive and industrial catalytic converters.

• Benefit: Enhances adhesion and stabilizes the active phase while maintaining high porosity and low pressure drop.

4. Precursor for Advanced Ceramics & Abrasives:

• Use: As a reactive precursor in the sol-gel synthesis of high-purity alumina ceramics, transparent ceramics, and advanced abrasive grains.

• Benefit: Allows for low-temperature processing, homogeneous doping, and control over the final ceramic's grain size and density.

5. Specialty Adsorbents & Desiccants:

• Use: Processed into high-capacity, activated alumina desiccants for drying gases and liquids.

• Benefit: High intrinsic SSA translates to high adsorption capacity and efficiency.

Why Aogochem Pseudo Boehmite is the Preferred Choice

• Unmatched Surface Area & Porosity Control: We offer one of the highest commercially available SSA ranges, giving catalysts a greater number of active sites. We can tailor the pore structure to match your specific reactant and product molecule sizes.

• Superior Peptization & Processability: Our product peptizes readily, forming stable sols or extrudable pastes with excellent rheological properties, which is critical for consistent shaping and coating manufacturing.

• High Purity for Demanding Applications: Low soda and other impurities ensure the derived alumina does not suffer from unwanted sintering or catalyst poisoning, which is vital for long catalyst life and high-temperature ceramic performance.

• Proven Transformation Consistency: The predictable and consistent transformation upon calcination ensures that the performance of your final alumina product is reliable batch after batch.

• Technical Expertise from Precursor to Product: We provide more than a material; we offer application guidance on peptization chemistry, shaping techniques, and calcination profiles to help you optimize the entire value chain from Pseudo Boehmite to your finished product.

Guidelines for Processing and Use

• For Catalyst Support Manufacturing: Typically peptized with 1-3% acid (based on Al₂O₃), mixed, extruded or shaped, dried, and finally calcined at 500-600°C to form γ-Al₂O₃.

• For Battery Coating Slurries: Dispersed in deionized water with appropriate dispersants and binders using high-shear mixing to form a stable, coatable slurry.

• Storage: Should be kept in a dry environment to prevent pre-maturation or hard caking.

Build your advanced material on a foundation of controlled chemistry. Contact Aogochem's technical sales team to discuss your application requirements, request samples of our high-surface-area Pseudo Boehmite, and access detailed processing guidelines to unlock its full potential.