Preparation method of high-purity pseudo-boehmite with concentrated pore size distribution and aluminum oxide

The invention belongs to the technical field of inorganic porous materials, and particularly relates to a preparation method of pore size concentrated distribution high-purity pseudo-boehmite and aluminum oxide, a slurry bed is used as a reactor for preparing alkoxy aluminum salt, the technological process is simple, the reaction time is short, introduction of a catalyst is not needed, the impurity removal problem does not need to be considered, and hydrogen escape does not need to be worried about. In the hydrolysis process, a fresh alkoxy aluminum salt solution and a peptizing agent with a proper association effect are adopted for pretreatment of an alkoxy alcohol solution, so that the alkoxy alcohol solution has high dispersibility, a pressure field effect catalyst is used for regulating and controlling a pore structure by means of a gaseous pressure pore diameter penetrating mechanism, and finally formed pseudo-boehmite and alumina pores are distributed in a concentrated manner and are adjustable and cont