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:
May. 17, 2016
Filed:
Sep. 09, 2013
Mitsubishi Chemical Corporation, Chiyodu-ku, JP;
Hiroshi Kameo, Okayama, JP;
Hidenobu Kajitani, Okayama, JP;
Kazuyuki Iwakai, Okayama, JP;
Hiroshi Takeo, Okayama, JP;
Souichi Orita, Okayama, JP;
Takeshi Takeuchi, Okayama, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
Abstract
Disclosed is a method for producing a conjugated diene by subjecting a monoolefin having a carbon atom number of 4 or more and an oxygen gas to an oxidative dehydrogenation reaction by using a molybdenum-containing metal oxide catalyst under heat removal with a coolant, wherein an amount of molybdenum adhered onto a cooling heat transfer surface within a reactor is kept at not more than 20 mg/m, or not only a surface roughness Ra of a cooling heat transfer surface within a reactor is not more than 3 μm, but a temperature difference between a reaction temperature and a coolant temperature is in the range of from 5 to 220° C.