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:
Mar. 09, 2021
Filed:
Sep. 11, 2017
Applicant:
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Inventors:
Kouichi Tamura, Yamaguchi, JP;
Tatsuhiko Kurakami, Yamaguchi, JP;
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 23/888 (2006.01); B01J 21/04 (2006.01); B01J 37/00 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); C07C 51/235 (2006.01); B01J 33/00 (2006.01); C07B 61/00 (2006.01);
U.S. Cl.
CPC ...
B01J 23/8885 (2013.01); B01J 21/04 (2013.01); B01J 23/888 (2013.01); B01J 33/00 (2013.01); B01J 37/00 (2013.01); B01J 37/0036 (2013.01); B01J 37/04 (2013.01); B01J 37/08 (2013.01); C07C 51/235 (2013.01); C07B 61/00 (2013.01);
Abstract
The present invention clarifies the characteristic of the hygroscopicity of the catalyst for producing acrylic acid and finds out a relationship between the water amount of the catalyst and the catalytic performance as the catalyst for producing acrylic acid, and provides an excellent catalyst. Provided is a catalyst for producing acrylic acid, which contains molybdenum and vanadium as essential active components, in which the amount of water contained in the catalyst is 0.01 mass % or more and 0.53 mass % or less.