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. 11, 2016
Filed:
Oct. 13, 2011
Applicants:
Sho Tamura, Tokyo, JP;
Sadao Shoji, Tokyo, JP;
Inventors:
Sho Tamura, Tokyo, JP;
Sadao Shoji, Tokyo, JP;
Assignee:
ASAHI KASEI CHEMICALS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 253/24 (2006.01); B01J 23/30 (2006.01); B01J 23/00 (2006.01); B01J 23/28 (2006.01); B01J 27/057 (2006.01);
U.S. Cl.
CPC ...
C07C 253/24 (2013.01); B01J 23/002 (2013.01); B01J 23/28 (2013.01); B01J 23/30 (2013.01); B01J 27/0576 (2013.01); B01J 2523/00 (2013.01);
Abstract
A method for producing an unsaturated nitrile by subjecting propane to a vapor-phase catalytic ammoxidation reaction using a fluidized bed reactor in the presence of a composite oxide catalyst containing Mo, V, and Nb, the method comprising the step of: adding a tungsten compound into the fluidized bed reactor to adjust a molar ratio (W/Mo ratio) of tungsten contained in a tungsten compound to molybdenum contained in the composite oxide catalyst that exist within the fluidized bed reactor so that the molar ratio is in the range of 0.0001 to 0.1.