Chinese Academy of Sciences

Chengrong Zhang

Xiang Li

Yuan Zhou

Yue Shen

Xiufeng Ren

Jinbo Zeng

Yanxia Sun

Chunxi Hai

Jianghua Liu

Xia Shen

Disclosed are methods for preparing high-purity boehmite and porous gamma-alumina nano-powder, comprising: adding aluminum isopropoxide into water and stirring the aluminum isopropoxide added water, then adding aluminum hydroxide generated by hydrolysis of high-purity aluminum powder into that stirred water, stirring that aluminum hydroxide added water to obtain a mixed system; carrying out hydrothermal reaction on the mixed system, performing centrifuging, washing, drying and crushing to the reacted mixed system, obtaining high-purity boehmite; calcining the high-purity boehmite to obtain porous gamma (&#x3b3;)-alumina nano-powder. By strictly controlling the addition of isopropanolic aluminum and the temperature as well as the duration of the hydrothermal reaction, the product boehmite &#x3b3;-AlOOH obtains good character in terms of crystalline structure, purity, morphology and dispersion; &#x3b3;-AlOobtained after calcining remains basically the same morphology as that of boehmite powder with good powder dispersion and no major changes.

Methods for preparing high-purity boehmite and porous gamma-alumina nano-powder

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Xining, China

Chengrong Zhang