| 摘要 |
The present invention relates to a method for the production of a lutein-fatty acid ester concentrate of high purity by dissolving marigold oleoresin in a ketone solvent such as acetone, cooling the solution, and removing therefrom a ketone solvent-insoluble impurity to uniform the quality of oleoresin, dissolving the acetone-soluble portion obtained by removing a ketone solvent from the ketone solvent solution in butanol, cooling the solution, eliminating a butanol-soluble impurity, and washing the resulting butanol-insoluble with ethanol. Prior to eliminating the butanol-soluble impurity, optionally at least one solvent selected from water, methanol and ethanol can be added to the cooled butanol solution. |
