Boehmite:
Boehmite, also known as boehmite monohydrate, is an important precursor to activated alumina. It is a highly ordered and crystalline activated alumina precursor.
Due to its excellent thermal stability, boehmite is an ideal choice for high-performance heat-resistant and flame-retardant materials, and is widely used in halogen-free copper-clad laminates, high-performance insulating materials, and heat-resistant engineering plastics. Furthermore, it is not only a major raw material for coal chemical catalysts but also a fundamental material for preparing lithium-ion battery separator coatings, sodium-sulfur battery solid electrolytes (β-Al₂O₃), and various special aluminas. In particular, low-sodium ultrafine alumina prepared from low-sodium ultrafine boehmite possesses high purity, good insulation, and excellent sintering activity, and has been successfully applied in high-end lithium-ion battery separators, precision/microcrystalline ceramics, integrated circuit chips, and aerospace light source devices.
Pseudoboehmite:
Pseudoboehmite is an incompletely crystalline boehmite with a similar chemical composition to other boehmite forms. It is a type of incompletely crystalline hydrated alumina, also known as monohydrate alumina or pseudo-monohydrate boehmite.
The typical structure of pseudoboehmite is an extremely thin, wrinkled lamellar layer. It is an alumina hydrate with a unique spatial network structure, possessing high specific surface area, large pore volume, and other physical properties, as well as thixotropic chemical properties under acidic conditions. These properties make pseudoboehmite widely used in many industries. In the petroleum industry, it is used as a catalyst, carrier, and binder; in the automotive industry, it is used as a carrier coating for automotive exhaust catalysts; in the environmental protection industry, it is used as a gas purification adsorbent, drinking water defluorinator, and industrial wastewater color and odor remover; and in the construction industry, it is used as a coating additive, etc.
In summary, the differences between the two are as follows:
(1) Pseudoboehmite is an amorphous aggregate; boehmite has a better crystal structure.
(2) Compared to boehmite, pseudoboehmite has a higher specific surface area and a larger pore volume. The specific surface area of pseudoboehmite gradually decreases with increasing temperature, while the specific surface area of boehmite first increases and then decreases with increasing temperature.
In addition, there is a transformation relationship between the two: under suitable temperature and pressure (such as hydrothermal conditions), pseudoboehmite will gradually age and crystallize, transforming into boehmite. Therefore, in industrial production, pseudoboehmite or boehmite products with specific properties are often synthesized by controlling reaction conditions (pH, temperature, time, aluminum source).
If you have any questions or needs regarding boehmite or pseudoboehmite, please feel free to contact Zibo Xiangrun Environmental Engineering Co., Ltd. – a professional alumina manufacturer.
![]()
