Patent attributes
A method of extracting cannabidiol from hemp. The method may include the following steps: performing grinding and drying on an extraction part of the hemp to obtain crude drug powder; extracting the crude drug powder with 30-100% (V/V) ethanol to obtain an extracting solution; concentrating the extracting solution to obtain an extractum; performing water precipitation on the extractum to remove impurities, thereby obtaining a water precipitation solution; centrifuging the water precipitation solution, and adding 10-100% (V/V) ethanol to dissolve the obtained precipitate, thereby obtaining a precipitate alcohol solution; performing column chromatography on the precipitate alcohol solution; concentrating the eluate obtained by elution after column chromatography, and adding ethanol for supersaturation and dissolution to obtain a crystal; adding purified water or ethanol to wash the crystal, thereby obtaining a primary product; and uniformly mixing the primary product with purified water, and drying to obtain the cannabidiol.
