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:
Apr. 23, 2024
Filed:
Oct. 01, 2020
Tokyo Institute of Technology, Tokyo, JP;
Tsubame Bhb Co., Ltd., Tokyo, JP;
Hideo Hosono, Meguro-ku, JP;
Masaaki Kitano, Meguro-ku, JP;
Toshiharu Yokoyama, Meguro-ku, JP;
Jiang Li, Meguro-ku, JP;
Shigeki Kawamura, Meguro-ku, JP;
Kazuhisa Kishida, Meguro-ku, JP;
Tokyo Institute of Technology, Tokyo, JP;
Tsubame BHB Co., Ltd., Tokyo, JP;
Abstract
Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7AlOhaving a specific surface area of 5 m/g or above; a second step for supporting a ruthenium compound on the 12CaO·7AlO; and a third step for performing a reduction process on the 12CaO·7AlOsupporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.