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:
Jan. 21, 2020
Filed:
Dec. 17, 2014
Cathay Biotech Inc., Shanghai, CN;
Cibt America Inc., Newark, DE (US);
Bingbing Qin, Shanghai, CN;
Charlie Liu, Shanghai, CN;
Shanshi Guo, Shanghai, CN;
Benliang Hou, Shanghai, CN;
Xiucai Liu, Shanghai, CN;
Cathay Biotech Inc., Shanghai, CN;
CIBT America Inc., Newark, DE (US);
Abstract
Provided is a method for purifying 1,5-pentanediamine comprising: providing 1,5-pentanediamine to be purified and treating the 1,5-pentanediamine to be purified by a reduction reaction to obtain purified 1,5-pentanediamine. Meanwhile, further provided is 1,5-pentanediamine prepared by the method. The purification method has a concise process and a simple operation, and is suitable for industrial production, and can significantly improve the quality of 1,5-pentanediamine.