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:
Feb. 28, 2017
Filed:
Jul. 17, 2014
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Tomoyuki Kawamura, Yamaguchi, JP;
Tatsuhiko Kurakami, Yamaguchi, JP;
Yuuta Nakazawa, Yamaguchi, JP;
Toru Kawaguchi, Yamaguchi, JP;
Motohiko Sugiyama, Yamaguchi, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a method of subjecting an alkene to partial oxidation by using a fixed bed multitubular reactor, thereby producing an unsaturated aldehyde and/or an unsaturated carboxylic acid each corresponding to the alkene, wherein a plurality of catalyst layers formed by N division (N is N≧2) with respect to a gas flow direction of a reaction tube are provided, and when a change (° C.) of hot spot temperature per 1° C. change of reaction bath temperature in the catalyst layer is designated as Sn, at least one of the plurality of catalyst layers is regulated to Sn≦6.