Mesoporous alumina preparation method based on cross-linking reaction

Abstract

The invention discloses a mesoporous alumina preparation method based on cross-linking reaction in the field of porous support technology. The preparation method comprises the steps of: weighting polyose electrolyte and dissolving in pure water to prepare a polyose electrolyte solution; adding an aluminum nitrate solution or mixed liquid of the aluminum nitrate solution and ammonia water and stirring uniformly to obtain compound sol; standing for 24h to obtain gel; aging for 24 hours and then carrying out constant-temperature drying treatment at 80 DEG C; crushing and then calcining for 8 hours at 650 DEG C to prepare white mesoporous alumina. The invention realizes the synthesis of the mesoporous alumina in a water phase system by taking cheap and environmental-protection saccharides which can be post-processed easily as a structural guide agent and using thin diaspore sol which is cheap and easily prepared as an aluminum precusor.

Description

technical field

[0001] The invention relates to a preparation method in the technical field of alumina, in particular to a preparation method of mesoporous alumina based on a crosslinking reaction. Background technique

[0002] Alumina is a very important industrial raw material. It is widely used in the field of catalysis. It is often used as catalyst and catalyst carrier in petroleum refining, automobile exhaust emission and other occasions. Mesoporous alumina has great application potential in many fields such as industrial catalysis and adsorption due to its high specific surface area, concentrated pore size distribution, and adjustable pore size.

[0003] At present, the synthesis methods of mesoporous alumina are mainly divided into soft template method and hard template method. The hard template method refers to using a solid with a mesoporous structure (silicon dioxide, carbon, etc.) as a "hard template", introducing an aluminum source precursor into the pores of th...