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Process for producing dry powders of one or more carotenoids
| Details |
Inventors: Runge, Frank; Luddecke, Erik; Pfeiffer, Angelika-Maria;
Assignee: BASF Aktiengesellschaft (Ludwigshafen, DE)
Primary Examiner: Sheikh; Humera N.
Assistant Examiner:
Attorney, Agent or Firm: Novak Druce & Quigg, LLP Voight; Jason D.
The invention relates to a process for producing dry powders of one or more carotenoids by a) dispersing one or more carotenoids in an aqueous molecular or colloidal solution of a mixture of lactose and a protective colloid and b) converting the dispersion which has formed into a dry powder by removing the water and, where appropriate, additionally used solvents and drying, where appropriate in the presence of a coating material, wherein at least one soybean protein is used as protective colloid in process step a). |
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DETAILED DESCRIPTION We claim: 1.
A method of improving the apparent density and stability of a dry powder of one or more carotenoids which comprises a) dispersing the one or more carotenoids in an aqueous molecular or colloidal solution of a mixture comprising effective amounts of lactose and a protective colloid, and optionally containing additional solvents, and b) converting the dispersion formed in step a) into a dry powder by removing the water and the additional solvents and drying, optionally in the presence of a coating material, wherein at least one soybean protein is used as protective colloid in process step a).
2.
The method of claim 1, wherein the dispersing step a) comprises preparing a suspension of the one or more carotenoids in the aqueous molecular or colloidal solution of the mixture of lactose and the at least one soybean protein.
3.
The method of claim 2, wherein the suspension prepared in step a) is ground before being converted into the dry powder in step b).
4.
The method of claim 1, wherein the dispersing step a) comprises the following steps: a.
sub.
1) dissolving the one or more carotenoids in a water-miscible organic solvent or in a mixture of water and a water-miscible organic solvent or a.
sub.
2) dissolving the one or more carotenoids in a water-immiscible organic solvent and a.
sub.
3) mixing the solution obtained in a.
sub.
1) or a.
sub.
2) with the aqueous molecular or colloidal solution of the mixture of lactose and the at least one soybean protein, to obtain a hydrophobic phase of the carotenoid in nanodispersed form.
5.
The method of claim 1, wherein at least one partially degraded soybean protein with a degree of hydrolysis of from 0.
1 to 20% is used as protective colloid.
6.
The method of claim 1, wherein the carotenoids used are oxygen-containing carotenoids.
7.
The method of claim 6, wherein the oxygen-containing carotenoids are compounds selected from the group consisting of astaxanthin, canthaxanthin, lutein, zeaxanthin, citranaxanthin and ethyl .
beta
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