US 12,043,603 B2 · Method for extracting and separating dihydromyricetin from rattan tea

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.

Claims6

Dependent claims

A method for extracting and separating dihydromyricetin from rattan tea, characterized by comprising steps are as follows:

1) weighing rattan tea leaves, then adding solvent thereto, stirring and reflux extracting, filtering, keeping on reflux extracting residue, and combining extract;
2) adding activated carbon to the extract from step 1), performing decolorization, filtering, retaining the filtrate, and then concentrating the filtrate;
and
3) crystallizing the concentrated filtrate from step 2), filtering, and washing the crystals with cold water and vacuum drying;
wherein the crystallization temperature of step 3) is 0-20° C., the crystallization time is 8-12 h, the drying temperature is 60-70° C., and the drying time is 6-8 h.

2 more elements

Dependencies are inferred from the claim text.

Method for extracting and separating dihydromyricetin from rattan tea

Life of this patent

Method for extracting and separating dihydromyricetin from rattan tea

Life of this patent

Abstract

Claims6