Preparation of high-purity pseudo boehmite and porous alumina by hydrolysis of aluminum isopropoxide

Today, the editor of Zhongtianli will talk to you about the preparation of high-purity pseudo boehmite and high-purity porous alumina by hydrolysis of isopropanol aluminum γ- Research on Al2O3.

The synthesis route uses aluminum isopropoxide as the raw material, changes the composition of the hydration solution, hydration temperature, and hydration time during the reaction process, and prepares a series of pseudo boehmite and its calcined porous products γ- The results indicate that the presence of isopropanol in the hydration solution inhibits the crystallization of amorphous aluminum hydroxide, but also helps to form alumina with large pore size, high specific surface area, and large pore volume;

In a pure water system, trihydrate will appear when hydrated below 60 ℃, while the product of hydration above 60 ℃ is pseudo boehmite; γ- The pore structure of Al2O3 is related to the crystallinity of the precursor pseudo boehmite. The larger the grain size of pseudo boehmite, the larger the pore size and volume of the alumina obtained by calcination. Therefore, changing the hydration conditions can achieve the control of the pseudo boehmite structure, thereby obtaining porous alumina with different structures. This provides a corresponding research basis for the industrialization of the hydrolysis of isopropanol aluminum to prepare high-purity pseudo boehmite and porous alumina.

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