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:
Jun. 04, 2024
Filed:
Dec. 15, 2021
Cathay Biotech Inc., Shanghai, CN;
Cibt America Inc., Newark, DE (US);
Cathay (Jinxiang) Biomaterial Co., Ltd., Shandong, CN;
Chen Yang, Shanghai, CN;
Shuhua Zhang, Shanghai, CN;
Yufeng Yang, Shanghai, CN;
Xiucai Liu, Shanghai, CN;
Cathay Biotech Inc., Shanghai, CN;
CIBT America Inc., Newark, DE (US);
Cathay (Jinxiang) Biomaterial Co., Ltd., Shandong, CN;
Abstract
The present disclosure provides a method for extracting long chain dicarboxylic acid, the method comprising: (1) subjecting a long chain dicarboxylic acid fermentation broth to a primary membrane filtration treatment to give a first filtrate; subjecting the first filtrate to decolorization, crystallization, and solid-liquid separation to give a first solid; (2) redissolving the first solid in water to form a solution; subjecting the solution to decolorization, crystallization by acidification, and solid-liquid separation to give a second solid. By the method, the resulted long chain dicarboxylic acid product has a high purity and no residual organic solvent.