Method for the purification of marigold oleoresin
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United States of America Patent
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May 8, 2007
Grant Date -
Mar 25, 2004
app pub date -
Sep 22, 2003
filing date -
Sep 20, 2002
priority date (Note) -
Expired
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Abstract
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.
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