What is pseudoboehmite?

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Pseudo-boehmite, also known as SB powder (Al2O3·nH2O or AlOOH·H2O, with n=0.08–0.62), is referred to in English as Pseudo-boehmite, and its abbreviation is PB. Pseudoboehmite, also known as pseudo/quasi/pseudohydrus boehmite, gelatinous boehmite, or boehmite-like substance, is a class of materials with uncertain composition and incomplete crystallization; they represent a transition from disordered to ordered states, as well as from weakly crystalline to fully crystalline structures. Their crystal structure is very similar to that of boehmite, but the crystals are small and have poor degree of crystallinity; their typical structure consists of thin, folded flake-like crystals. It is a non-toxic, tasteless, and odorless white gel-like (in wet form) or powder-like (in dry form) substance with fine particle size, high pore volume, large specific surface area, good solubility, and high crystal purity. It possesses thixotropic gel properties, is highly soluble in strong acids and strong bases, and the dry powder absorbs moisture when exposed to air. In modern petrochemical and chemical industries, over 90% of chemical reactions are carried out through catalysts. Catalysts are also widely used in the development of new energy, the comprehensive utilization of resources, and the control of environmental pollution. There are a great variety of catalysts in terms of type and quantity. Solid catalysts used in oil refining, petrochemicals, or fine chemicals all require carriers, with active alumina carriers accounting for approximately 57% of the market share in the catalyst carrier industry. Hydrotalcite, as the main raw material for producing active alumina carriers, holds an important position in the catalyst industry. Diatomaceous earth accounts for 20% of the total amount used in catalyst production. In recent years, the three major catalyst manufacturers – Sinopec Changling Refining Co., Ltd., Qilu Petrochemical Company’s Catalyst Factory, and Lanzhou Refining & Chemical Company’s Catalyst Factory – have successively upgraded and expanded their production lines, which has led to an increasing demand for diaspore. The United States, Western Europe, and Japan are among the main countries in the world that produce catalysts. Main application forms: 1. Used as a binder in the petrochemical and refining catalyst industry, as well as an aluminum source for the synthesis of molecular sieves; pseudoboehmite is primarily used as a binder in catalytic cracking catalysts. Using pseudoboehmite as a binder can not only enhance the strength of the catalyst, but also adjust its pore size distribution, improve its thermal and hydrothermal stability, regulate the density of its acidic active centers, and thus increase its catalytic activity. 2. As a catalyst carrier, pseudoboehmite is widely used in various reactions in the chemical, refining, and petrochemical industries as a catalyst support. Typical examples include catalyst supports for hydrorefining, reforming, and methanation reactions. Dihydroaluminite, after dehydration to form γ-alumina, can also be used as a catalyst. Our company specializes in the production of high-purity pseudoboehmite, with a purity level of over 99.9%. We can also manufacture high-purity pseudoboehmite with the desired pore volume, pore size, and specific surface area, according to the requirements of our customers.