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:
Dec. 03, 2024
Filed:
Mar. 17, 2020
Applicant:
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/35 (2006.01); B01J 23/00 (2006.01); B01J 23/887 (2006.01); B01J 35/40 (2024.01); B01J 35/51 (2024.01); B01J 37/00 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01);
U.S. Cl.
CPC ...
C07C 45/35 (2013.01); B01J 23/002 (2013.01); B01J 23/887 (2013.01); B01J 23/8876 (2013.01); B01J 35/40 (2024.01); B01J 35/51 (2024.01); B01J 37/0018 (2013.01); B01J 37/0045 (2013.01); B01J 37/04 (2013.01); B01J 37/088 (2013.01); B01J 2523/00 (2013.01);
Abstract
Provided is a method for producing an unsaturated aldehyde including subjecting an alkene to partial oxidation using a fixed bed multi-tube reactor to produce the corresponding unsaturated aldehyde, in which n catalyst layers (n is 2 or more) in a gas flow direction in a reaction tube are provided, when a filling length of the catalyst layers from a first catalyst layer to an (n−1)th catalyst layer from a gas inlet side of the reaction tube is L, and a filling length of an nth catalyst layer from the gas inlet side of the reaction tube is Ln, a relationship between L and Ln satisfies the following equation (1): and