Water-based extraction and purification processes for cannabinoid acids
AssigneeMedpharm Iowa LLC
InventorsJack McCaslin Carraher, Zach Joseph Baker
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Abstract
The present invention relates to methods of extracting cannabinoid acids from cannabis plant material by combining the plant material with an aqueous solution having a high pH to solubilize cannabinoid acid anions, followed by precipitation of the cannabinoid acids at low pH and filtration. The method provides yields of up to 97%, while high pH purification of ethanol extracted oils yielded purities up to 86%.
Claims14
A method of extracting cannabinoids acids from cannabis-containing plant material that does not require use of a method selected from the group consisting of dewaxing, recovery of solvent, and distillation, said method including the steps of:
- mixing a cannabis-containing plant material with an aqueous base solution to form a basic mixture;
- separating the aqueous base solution from the plant material;
- adding a salt to the basic mixture;
- acidifying the basic mixture to form a precipitate;
- and
- removing the precipitate;
- whereby the method does not include a dewaxing step or solvent collection.
Dependencies are inferred from the claim text.