Process for extracting oleanolic acid from plant material
AssigneeE. & J. Gallo Winery
InventorGerold Jerz
Life of this patent
Estimating the term…
Abstract
A process for extracting oleanolic acid from plant material is disclosed. Dried plant material is provided and an extraction process is carried out with a non-halogenated polar to medium polar solvent. The resulting solution that contains oleanolic acid is separated from the plant material and the solvent is removed using cooling, vacuum-evaporation or other techniques. A precipitate is formed that contains mostly oleanolic acid. Subsequent purification steps to provide highly purified oleanolic acid include washing techniques, re-crystallization techniques or the use of chromatography.
Claims47
A process for extracting oleanolic acid from plant material comprising:
- providing plant material that comprises oleanolic acid;
- mixing a non-halogenated polar to medium polar solvent with the plant material;
- and
- extracting a solution comprising the non-halogenated polar to medium polar solvent and oleanolic acid from the plant material.
A process for extracting oleanolic acid from a material that comprises grape skins, the process comprising:
- providing dry material;
- mixing an alcohol solvent on other polar or medium polar non-halogenated solvent with the material;
- extracting a solution comprising the alcohol solvent and oleanolic acid from the material;
- forming a precipitate comprising oleanolic acid from the solution;
- removing the alcohol solvent from the precipitate;
- and
- purifying the oleanolic acid in the precipitate.
A process for extracting oleanolic acid from plant material comprising:
- providing plant material;
- mixing supercritical carbon dioxide with the plant material;
- recovering an extract comprising the supercritical carbon dioxide and oleanolic acid from the plant material;
- removing the carbon dioxide from the solution to form a precipitate comprising the oleanolic acid;
- purifying the oleanolic acid in the precipitate.
Dependencies are inferred from the claim text.