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:
Jun. 17, 2008
Filed:
Oct. 20, 2004
Kimikatsu Jinno, Mie, JP;
Yasushi Ogawa, Mie, JP;
Yoshiro Suzuki, Mie, JP;
Shuhei Yada, Mie, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A method for producing (meth)acrylic acid or (meth)acrolein, comprising a catalytic gas phase oxidation process for producing (meth)acrylic acid or (meth)acrolein by supplying propylene, propane, or isobutylene and a gas containing molecular oxygen to a reactor which contains a catalyst filled therein, wherein a gas containing molecular oxygen is supplied to the reactor having the catalyst filled therein during shutdown of the catalytic gas phase oxidation process does not lower the reaction activity of the catalyst and the selectivity of target products when re-starting the running after shutdown of the catalytic gas phase oxidation process.