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:
Oct. 10, 2006
Filed:
Sep. 10, 2004
Yasuyuki Sakakura, Mie, JP;
Shuhei Yada, Mie, JP;
Kimikatsu Jinno, Mie, JP;
Hirochika Hosaka, Mie, JP;
Yoshiro Suzuki, Mie, JP;
Yasuyuki Sakakura, Mie, JP;
Shuhei Yada, Mie, JP;
Kimikatsu Jinno, Mie, JP;
Hirochika Hosaka, Mie, JP;
Yoshiro Suzuki, Mie, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
The present invention provides a process for catalytic vapor phase oxidation which prevents runaway reaction or early deterioration of a catalyst, in the production of (meth)acrylic acid or the like from propylene or isobutylene by the catalytic vapor phase oxidation process using a multi-tubular reactor, which can lead to the production thereof constantly in high yield for a long period of time. Further, the present invention provides a process for catalytic vapor phase oxidation wherein raw material gas is introduced for oxidation into reaction tubes of a multi-tubular reactor which is equipped with, as arranged within the shell of the reactor, a plurality of reaction tubes having a catalyst packed therein and a plurality of baffle plates for changing the direction of the flow of a heating medium introduced into the shell, characterized in that the temperature of the catalyst packed in a reaction tube which is not connected with at least one baffle plate is measured at plural points in the direction of an axis of the reaction tube.