39 results about "Tangeretin" patented technology

The invention discloses a method for separating tangeretin and nobiletin from citrus flavonoid extract, comprising the main steps: crushing immature bitter orange or orange peel, adding a first organic solvent, and refluxing for extracting to obtain first extract liquid; adding the first organic solvent again, refluxing for extracting to obtain second extract liquid, and combining the second extract liquid with the first extract liquid; recycling the extract liquid to obtain crude extract; adding clear water, mixing to obtain a mixed solution, and adding a second organic solvent for extracting to obtain a water layer and an organic layer; recycling the organic layer to obtain extract; adding a third organic solvent and activated carbon; extracting a mixture, subjecting extraction liquid to cooling and filtering to obtain filtrate and activated carbon residue, vacuum concentrating the filtrate to obtain secondary extract; adding ethyl alcohol to dissolve the secondary extract, and separating and refining to obtain tangeretin; dissolving the activated carbon residue with ethyl alcohol, and acquiring secondary extract by cooling, filtering and ethyl alcohol recycling; adding ethyl alcohol for reflux dissolving, and separating and refining to obtain nobiletin. The problem that it is difficult for the prior art to acquire high content of polymethoxyflavonoids and the component is single is solved.