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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.:

US 11628425 B1

PDFFull Text
Date of Patent:
Apr. 18, 2023

Filed:

Sep. 24, 2019

Catalyst and catalyst group

Applicant:

Mitsubishi Chemical Corporation, Chiyoda-ku, JP;

Inventors:

Kazuharu Tazawa, Tokyo, JP;

Takanori Taniguchi, Tokyo, JP;

Takuya Nakamura, Tokyo, JP;

Assignee:

Mitsubishi Chemical Corporation, Chiyoda-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Coris Fung

Assistant Examiner:

Keling Zhang

Int. Cl.
CPC ...
B01J 35/02 (2006.01); B01J 23/887 (2006.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); B01J 37/08 (2006.01); C07C 45/35 (2006.01); C07C 51/25 (2006.01); B01J 23/843 (2006.01); B01J 23/883 (2006.01); B01J 21/08 (2006.01); B01J 23/00 (2006.01); B01J 35/10 (2006.01); B01J 35/00 (2006.01);
U.S. Cl.
CPC ...
B01J 23/8877 (2013.01); B01J 21/08 (2013.01); B01J 23/002 (2013.01); B01J 23/8435 (2013.01); B01J 23/883 (2013.01); B01J 23/8876 (2013.01); B01J 35/002 (2013.01); B01J 35/02 (2013.01); B01J 35/023 (2013.01); B01J 35/026 (2013.01); B01J 35/1014 (2013.01); B01J 37/0036 (2013.01); B01J 37/0221 (2013.01); B01J 37/0228 (2013.01); B01J 37/0236 (2013.01); B01J 37/0244 (2013.01); B01J 37/038 (2013.01); B01J 37/08 (2013.01); C07C 45/35 (2013.01); C07C 51/252 (2013.01); B01J 2523/00 (2013.01);
Abstract

An object of the present invention is to provide a catalyst ensuring that when a gas-phase catalytic oxidation reaction of a material substance is conducted using a catalyst to produce a target substance, the pressure loss and coking are suppressed and the target substance can be produced in high yield. The present invention is related to a ring-shaped catalyst having a straight body part and a hollow body part, which is used when a gas-phase catalytic oxidation reaction of a material substance is conducted to produce a target substance, wherein a length of the straight body part is shorter than a length of the hollow body part and at least at one end part, a region from an end part of the straight body part to an end part of the hollow body part is concavely curved.

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