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:
Nov. 23, 2021
Filed:
Dec. 12, 2018
Applicant:
Sumitomo Chemical Company, Limited, Chuo-ku, JP;
Inventors:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Chuo-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C 319/20 (2006.01); C07C 319/28 (2006.01); C07C 323/58 (2006.01); B01D 19/00 (2006.01); C01C 1/12 (2006.01);
U.S. Cl.
CPC ...
C07C 319/20 (2013.01); B01D 19/0005 (2013.01); C07C 319/28 (2013.01); C01C 1/12 (2013.01); C07C 323/58 (2013.01);
Abstract
An object of the present invention to provide a method for producing methionine with consideration given to the environment. The production method of the present invention comprises a removal step of blowing an inert gas into a liquid containing 5-(2-methylmercaptoethyl)hydantoin and thereby diffusing ammonia remaining in the liquid to obtain an emission gas containing the ammonia, and a recovery step of bringing the emission gas into contact with a washing liquid to recover ammonia contained in the emission gas.