Method for preparing mesoporous gamma-Al2O3 by dynamic hydrothermal method

The invention relates to a method for preparing mesoporous gamma-Al2O3 by a dynamic hydrothermal method, belonging to the field of preparation of inorganic porous materials. The invention aims to solve the problems that in the prior art, reaction steps are multiple, experimental conditions are difficult to control, products are incompletely crystallized, the reaction time is too long, and a static reaction does not facilitate full contact among reaction materials. The method comprises the following steps of: adding inorganic aluminum salt and a precipitating agent into surfactant solution respectively, and uniformly mixing the inorganic aluminum salt with the precipitating agent; continuously stirring the mixed solution, and performing hydrothermal treatment; and washing and calcinating obtained products after finishing the reaction, and thus obtaining the mesoporous gamma-Al2O3. The method has the advantages that: the reaction is performed more fully, the formation of alumina precursors can be simply controlled, the formation of mesoporous alumina can be effectively controlled, the crystallization time is shortened to be less than 24 hours, the preparation period is short, and the method is suitable for large-scale continuous production.