Pseudoboehmite

Pseudo-boehmite, namely SB powder (Al2O3·nH2O or, AlOOH·H2O n=0.08—0.62) English name Pseudo-boehmite, English abbreviation PB.

Pseudo-boehmite, also known as pseudo/quasi/pseudo-boehmite, pseudo-boehmite, gelatinous boehmite, or boehmite, it is a kind of boehmite with uncertain composition and incomplete crystallization. Disordered to ordered, weakly crystalline to crystalline transition products. The crystal structure is completely similar to that of boehmite, but the crystals are small and the crystallinity is poor. The typical structure is very thin and wrinkled platelets. It is a non-toxic, tasteless, odorless white colloidal (wet product) or powder (dry product) product with small particle size, high pore volume, large specific surface area, good peptizing performance, and high crystal phase purity. The characteristic of thixotropic gel is that it is easily soluble in strong acid and alkali, and the dry powder will absorb moisture when exposed to the air.

Application of Pseudo-boehmite

1. Used as a binder in petrochemical and refining catalyst industries and as an aluminum source for molecular sieve synthesis

Pseudo-boehmite is mainly used as a catalyst for catalytic cracking as a binder. Pseudo-boehmite as a binder can not only improve the strength of the catalyst, but also adjust the pore size distribution of the catalyst,which is improving the thermal and hydrothermal stability of the catalyst, adjusting the density of the acid active center of the catalyst, and improving the catalytic activity.

2. Used as catalyst carrier

Pseudo-boehmite is widely used as catalyst carrier for various reactions in chemical industry, oil refining and petrochemical industry. Typical examples include hydrorefining catalyst carrier, reforming catalyst carrier, methanation catalyst carrier, etc. Pseudo-boehmite can also be used as a catalyst after dehydration to become γ-alumina.

In modern petrochemical and chemical industries, more than 90% of chemical reactions are realized through catalysts. Catalysts are also widely used in new energy development, comprehensive utilization of resources and environmental pollution control. There are many types and quantities of catalysts. Whether it is a solid catalyst used in oil refining, petrochemical industry or fine chemical industry, it is necessary to use a carrier. The proportion of activated alumina carrier in the catalyst carrier industry is about 57%. Pseudoboehmite, as the main raw material for preparing activated alumina carrier, occupies an important position in the catalyst industry. The amount of pseudo-boehmite used in catalyst production accounted for 20% of the total.