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:
Aug. 12, 2025
Filed:
May. 27, 2020
Tosoh Corporation, Yamaguchi, JP;
Tomoya Ishikawa, Yamaguchi, JP;
Yoshitaka Yamasaki, Yamaguchi, JP;
TOSOH CORPORATION, Yamaguchi, JP;
Abstract
Provided is at least one of a production method that can obtain AEI zeolite that has a silica-to-alumina molar ratio suitable as a nitrogen oxide-reducing catalyst or a support thereof and that involves a shorter crystallization time and higher yield compared to a typical AEI zeolite production method that does not use crystalline aluminosilicate as a starting material, or an AEI zeolite production method that is expected to be industrially applicable. An AEI zeolite production method includes hydrothermally processing an amorphous composition containing an amorphous silica source, an amorphous alumina source, an alkali source and water, and then crystallizing a raw material composition obtained by mixing an organic structure-directing agent and the amorphous composition.