Process for the isomerization of lutein
AssigneeIndustrial Organica S.A. DE C.V.
InventorsMario-David Torres-Cardona, Jose Torres-Quiroga
Life of this patent
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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.
Claims30
A process to isomerize lutein into zeaxanthin, comprising treating a lutein reaction substrate selected from the group consisting of marigold flowers, marigold leaves, marigold meal, marigold oleoresin, or mixtures, extracts, or concentrates thereof, yellow corn and yellow corn gluten, or mixtures, extracts or concentrates thereof, with a strongly aqueous alkaline solution under controlled conditions of temperature and pressure for a length of time that depends on the degree of the desired isomerization.
A lutein isomerized substrate having a zeaxanthin content from about 5 % to about 50% of the total xanthophylls, produced by isomerizing a lutein reaction substrate selected from the group consisting of marigold flowers, marigold leaves, marigold meal, marigold oleoresin, or mixtures, extracts, or concentrates thereof, yellow corn and yellow corn gluten, or mixtures, extracts, or concentrates thereof, with a strongly aqueous alkaline solution under controlled conditions of temperature and pressure for a length of time that depends on the degree of the desired isomerization.
Dependencies are inferred from the claim text.