Fecha de publicación:
Fuente: WIPO "hemp"
The invention relates to the technical field of purification, in particular to an extraction and purification method of cannabidiol. The extraction and purification method comprises the following steps: crushing and drying industrial hemp leaves to obtain a dried material; extracting the dried material in ethanol or an ethanol-water solution, removing a solvent from the obtained extract solution,and drying to obtain an extraction extract; washing the extract with an acetic acid solution or a sodium carbonate solution, and drying the precipitate to obtain a dried extract; and dissolving the dried extract with ethanol or acetonitrile, adding PSA, activated carbon, C18 and magnesium sulfate into the solution, oscillating, centrifuging, removing the solvent, and drying. By adopting the extraction and purification method, the operation is simple, the CBD content can reach 40-58%, a plurality of prototype experiments can be carried out, original substances in a plurality of industrial cannabis sativa are reserved in the extraction process, and convenience can be brought to analysis of other functional components in the industrial cannabis sativa.