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. 08, 2026
Filed:
Feb. 18, 2021
Renaissance Energy Research Corporation, Kyoto, JP;
National Institute of Technology, Tokyo, JP;
Akira Hasegawa, Aomori, JP;
Yoshihiro Kadoma, Aomori, JP;
Osamu Okada, Kyoto, JP;
Kana Motomura, Kyoto, JP;
Shizuka Ogasawara, Kyoto, JP;
Hiromi Nakamura, Kyoto, JP;
Tamotsu Nonouchi, Kyoto, JP;
Kaori Matsuda, Kyoto, JP;
Renaissance Energy Research Corporation, Kyoto, JP;
NATIONAL INSTITUTE OF TECHNOLOGY, Tokyo, JP;
Abstract
Porous alumina having excellent heat resistance and coking resistance is provided. The porous alumina can include silica and barium oxide added to aluminum oxide, wherein a ratio of SiO2 addition amount to a total mass of aluminum oxide and SiO2 addition amount is defined as SiO2 addition ratio (mass %), a ratio of BaO addition amount to a total mass of aluminum oxide and SiO2 addition amount is defined as BaO addition ratio (mass %), when the SiO2 addition ratio is within a range of 3 mass % or less and the BaO addition ratio is within a range of 14 mass % or less, the silica and the barium oxide are respectively added to the aluminum oxide so that a specific surface area of the porous alumina measured by a measuring method after heat treatment is equal to or larger than a reference specific surface area of reference porous alumina.