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. 13, 2018
Filed:
Jan. 27, 2017
Cathay R&d Center Co., Ltd., New District, Shanghai, CN;
Cathay Industrial Biotech Ltd., Grand Cayman, KY;
Xiucai Liu, Shanghai, CN;
Charlie Liu, Shanghai, CN;
Bingbing Qin, Shanghai, CN;
Naiqiang Li, Shanghai, CN;
Yang Chen, Shanghai, CN;
CATHAY R&D CENTER CO., LTD., Pudong New District, Shanghai, CN;
CATHAY INDUSTRIAL BIOTECH LTD., George Town, Grand Cayman, KY;
Abstract
The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases selected from the group consisting of Ca(OH), Mg(OH), CaO and MgO to provide an aqueous cadaverine composition; and (2) distilling or evaporating the aqueous cadaverine composition to produce purified cadaverine; wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation stops, and the one or more solvents comprise at least one or more high boiling point (HBP) solvents.