The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2023
Filed:
Jul. 26, 2022
Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, CN;
Jinbo Zeng, Xining, CN;
Chunxi Hai, Xining, CN;
Yue Shen, Xining, CN;
Yuan Zhou, Xining, CN;
Xiang Li, Xining, CN;
Xiufeng Ren, Xining, CN;
Yanxia Sun, Xining, CN;
Xia Shen, Xining, CN;
Chengrong Zhang, Xining, CN;
Jianghua Liu, Xining, CN;
Abstract
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 (γ)-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 γ-AlOOH obtains good character in terms of crystalline structure, purity, morphology and dispersion; γ-AlOobtained after calcining remains basically the same morphology as that of boehmite powder with good powder dispersion and no major changes.