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:
Sep. 03, 2024
Filed:
Oct. 08, 2021
Daiichi Kigenso Kagaku Kogyo Co., Ltd., Osaka, JP;
Hiroyuki Hayashida, Osaka, JP;
Yoshikazu Hirose, Osaka, JP;
DAIICHI KIGENSO KAGAKU KOGYO CO., LTD., Osaka, JP;
Abstract
Provided is an alumina-based composite oxide having a large initial specific surface area and a small initial mean pore size, with excellent heat resistance of the specific surface area and pore volume; and a production method therefor. Specifically, provided is an alumina-based composite oxide wherein the initial crystallite diameter is 10 nm or less and the initial specific surface area is 80 m/ml or more; after calcination at 1200° C. for 3 hours in air, the specific surface area is 10 m/ml or more; the initial mean pore size is 10 nm or more and 50 nm or less; and after calcination at 1200° C. for 3 hours in air, the pore volume retention rate is 10% or more, which is determined by (P/P)×100 wherein Prepresents an initial pore volume (ml/g), and Prepresents a pore volume (ml/g) after calcination at 1200° C. for 3 hours in air.