Fecha de publicación: 15/09/2022 Fuente: WIPO "hemp" Systems and methods to isolate relatively pure isolated cannabinoids include heating a starting hemp material to form a heated liquid, adding a catalyst, and cooling the heated liquid. Catalysts include relatively pure seed cannabinoid crystals, such as above 95% pure CBD, CBG, and CBN crystals. The precipitate formed during cooling the heated liquid may be treated one or more times by heating, adding catalyst, and cooling to form another precipitate.