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:
Nov. 01, 2022
Filed:
Nov. 28, 2018
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
National University Corporation Tottori University, Tottori, JP;
National University Corporation Yokohama National University, Kanagawa, JP;
Yoshihiro Kamimura, Ibaraki, JP;
Akira Endou, Ibaraki, JP;
Yasuo Yamazaki, Tokyo, JP;
Naonobu Katada, Tottori, JP;
Satoshi Suganuma, Tottori, JP;
Yoshihiro Kubota, Kanagawa, JP;
Satoshi Inagaki, Kanagawa, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, Tottori, JP;
NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, Kanagawa, JP;
Abstract
Provided are the following: an MWW type zeolite which has many Brønsted acid sites when in the form of a proton type and which is highly suitable as a cracking catalyst for cumene; a method for producing same; and an application of same. The present invention provides an MWW type zeolite in which the ratio (B/A) of the peak intensity (B) attributable to tetracoordinate aluminum relative to the peak intensity (A) attributable to hexacoordinate aluminum is 2 or more inAl MAS NMR, when measured as an ammonium type. The present invention also provides a method for producing an MWW type zeolite, the method having a step for carrying out a hydrothermal synthesis reaction in the presence of: a seed crystal of an MWW type zeolite containing no organic structure-directing agent; and a reaction mixture containing a silica source, an alumina source, an alkali source, an organic structure-directing agent, and water. The reaction mixture satisfies the following molar ratio: X/SiO<0.15 (here, X denotes the number of moles of the organic structure-directing agent).