Method for preparing high-purity cannabidiol
US10662137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jan 8, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2236/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing high-purity cannabidiol is characterized in that: the leaves of cannabis and top portions of the plant which account for about one-fifth of the whole plant are used as extraction sites; a technology of combined macroporous adsorption resin chromatography and polyamide chromatography is used for purification; and a mixed solvent system is used for crystallization purification so as to ensure that the yield is improved to the maximum extent under the premise of obtaining a high-purity product. The product obtained from this method contains high-purity CBD; the method has a high yield and is a simple process, and thus easy to industrialize.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.