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:
Feb. 14, 2023
Filed:
Apr. 21, 2021
Applicant:
Qianjiang Yongan Pharmaceutical Co., Ltd., Qianjiang, CN;
Inventors:
Yong Chen, Qianjiang, CN;
Xiquan Fang, Qianjiang, CN;
Shaobo Li, Qianjiang, CN;
Feng Liu, Qianjiang, CN;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 303/22 (2006.01); C07C 303/44 (2006.01); C07C 303/32 (2006.01); B01J 39/18 (2017.01);
U.S. Cl.
CPC ...
C07C 303/22 (2013.01); B01J 39/18 (2013.01); C07C 303/32 (2013.01); C07C 303/44 (2013.01);
Abstract
A method for preparing high-purity taurine and salt by reacting ethylene oxide with bisulfite to generate isethionate, performing an ammonolysis reaction on the isethionate in combination with ammonia and a metal salt, evaporating the reaction solution and subjecting the concentrated solution to ion exchange to obtain an adsorption solution, extracting taurine from the adsorption solution, eluting adsorbed metal cations from the ion exchange system by an acid, and separately collecting the eluate containing a salt.