Process for the isomerization of lutein
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United States of America Patent
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Jun 4, 1996
Grant Date -
N/A
app pub date -
Jul 20, 1994
filing date -
Jul 20, 1994
priority date (Note) -
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Abstract
A process to obtain a product with a high zeaxanthin content, to be used mainly as an ingredient in poultry feed to enhance the pigmentation of broiler chickens and egg yolk, by reacting at a controlled temperature and pressure, marigold (Tagetes erecta L.) meal or its oleoresin, or formulations containing lutein, with strongly alkaline aqueous solutions under controlled conditions, to isomerize the luteine into zeaxanthin in a product with a higher pigmenting activity.
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