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:
Jul. 23, 2024
Filed:
May. 08, 2020
Shanghai Spark Pharmaceutical Co., Ltd., Shanghai, CN;
Kunyuan Song, Shanghai, CN;
Gong Chen, Shanghai, CN;
Weiwei Chen, Shanghai, CN;
Fang Yan, Shanghai, CN;
SHANGHAI SPARK PHARMACEUTICAL CO., LTD., Shanghai, CN;
Abstract
A method for extracting and separating dihydromyricetin from rattan tea, which belongs to the technical field of natural medicine extraction and separation, includes: 1) weighing rattan tea leaves, then adding solvent thereto, stirring and refluxing to extract, filtering, keeping on refluxing extraction of residue, and combining extract; 2) adding activated carbon to the extract, performing decolorization, filtering, retaining the filtrate, and then concentrating the filtrate; and 3) crystallizing the concentrated filtrate, filtering, and washing the crystals with cold water and vacuum drying. The method has simple process, high yield and stability, and is easy to realize industrialized production.