Method for the purification of marigold oleoresin

摘要

Marigold oleoresin having a low viscosity and a high lutein content which can be filled in soft capsules can be obtained according to the method of the present invention, which is characterized by combining a step of subjecting oleoresin to supercritical fluid extraction and a step of dissolving oleoresin in a ketone solvent, cooling the solution and removing the ingredient which precipitated in solution.