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:
Apr. 02, 2019
Filed:
Oct. 14, 2014
Asymchem Laboratories (Tianjin) Co., Ltd, Tainjin, CN;
Asymchem Life Science (Tianjin) Co., Ltd, Tianjin, CN;
Tianjin Asymchem Pharmaceutical Co., Ltd., Tianjin, CN;
Asymchem Laboratories (Fuxin) Co., Ltd, Liaoning, CN;
Jilin Asymchem Laboratories Co., Ltd., Jilin, CN;
ASYMCHEM LABORATORIES (TIANJIN) CO., LTD., Tianjin, CN;
Abstract
A method for preparing sulfobutyl ether-β-cyclodextrin. β-cyclodextrin and 1,4-sulfobutyrolactone are used as raw materials, and a proper amount of an organic solvent is introduced into an alkaline aqueous solution, so that the solubility of the 1,4-sulfobutyrolactone is increased, and the synthesis yield of the sulfobutyl ether-β-cyclodextrin is improved. Operations including ultrasonic dialysis, active carbon decoloration, freeze-drying and so on are performed on the obtained product solution, so as to obtain a powder product of the sulfobutyl ether-beta-cyclodextrin.