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:
Apr. 12, 2022
Filed:
Jan. 16, 2017
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventor:
Naoyuki Tanaka, Kawasaki, JP;
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 231/12 (2006.01); C07C 231/24 (2006.01); C07C 233/18 (2006.01); B01J 21/04 (2006.01); B01J 23/42 (2006.01);
U.S. Cl.
CPC ...
C07C 231/12 (2013.01); B01J 21/04 (2013.01); B01J 23/42 (2013.01); C07C 231/24 (2013.01); C07C 233/18 (2013.01);
Abstract
A method for producing an N-vinylcarboxylic acid amide is provided, the method focusing on unsaturated aldehydes that are contained as impurities generated during a reaction. The method for producing an N-vinylcarboxylic acid amide includes a step for controlling the contained amount of unsaturated aldehydes in the N-vinylcarboxylic acid amide to be not more than 20 mass ppm.