what is pseudoboehmite alumina powder?
- AlOOH · nH 2O, n = 0.08 ~ 0.62,
- non-toxic, tasteless,
- odorless,
- white colloidal (wet product) or powder Good peptization properties,
- strong adhesion,
- with a high surface area,
- pore volume and other characteristics of the water-containing thixotropic gel.
It can be used as a binder for semi-synthetic rare earth Y-type molecular sieve cracking catalyst, binder for alumina silicate refractory fiber, alcohol dehydration to ethylene catalyst and ethylene oxide catalyst. It can also be used as catalyst carrier, activated alumina and other Aluminum salt of raw materials.
The product γ-Al2O3 calcined at 400~700 ° C is widely used as a catalyst carrier, catalyst and adsorbent; calcined at 1100~1200 ° C to obtain α-Al2O3, which is widely used as a coating additive, high-grade ceramic, Petrochemical efficient catalysts, sub-micron / nano-abrasive and polishing materials, cosmetic materials and inorganic fillers, etc., is a broad class of promising new materials.
In addition, it is also the first choice of aluminum source for the synthesis of aluminum phosphate molecular sieves and heteroatom phosphorus-aluminum molecular sieves. For the synthesis of aluminophosphate molecular sieve and heteroatomic phosphorus-aluminum molecular sieve, it is best to join the phosphorus source and aluminum source along with the addition of oxygen source. The general aluminum salt aluminum atoms are not connected to the oxygen atoms, if it is used as an aluminum source, it is difficult or enough oxygen source, so under normal circumstances do not use aluminum salt. In view of the requirement of uniform dispersion of the reaction mixture, the added aluminum source is preferably soluble in weak acid or medium strength acid solution, while aluminum oxide or aluminum hydroxide is only soluble in strong acid or alkali solution, which is unfavorable to the reaction mixture Decentralized, not suitable for aluminum source. The pseudo-boehmite can meet the requirements of uniform dispersion of oxygen source and reaction, which is the preferred aluminum source for experiments.