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. 25, 2020
Filed:
Jan. 17, 2019
Nanjing University, Nanjing, CN;
Hong Li, Nanjing, CN;
Quanxing Zhang, Nanjing, CN;
Jiaye Sheng, Nanjing, CN;
Na Cheng, Nanjing, CN;
Wei Huang, Nanjing, CN;
Wei Jiang, Nanjing, CN;
Aimin Li, Nanjing, CN;
NANJING UNIVERSITY, Nanjing, CN;
Abstract
A method of purifying a cyclic ester, the method including: granulating a crude cyclic ester, an average particle size of resulting granules being 0.05-1.00 mm; adding the granules to 0-4° C. water to yield a mixture, a mass ratio of the water to the granules being (0.5-2):1; stirring the mixture, and performing solid-liquid separation on the mixture; repeating the stirring and solid-liquid separation for 1-4 times, to yield a purified cyclic ester; drying the purified cyclic ester at 0-4° C. and at an absolute pressure of less than or equal to 10 pascal for 4-6 hours, and continually drying the purified cyclic ester at 40-60° C. and at an absolute pressure of less than or equal to 5 pascal for 1-2 hours.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile