Stable vitamin A
AssigneeThe Procter & Gamble Company
InventorsRobert J. Sarama, Michael R. Sevenants, Robert A. Sanders
Life of this patent
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Abstract
A process for purifying vitamin A consisting of heating a vitamin A preparation in an inert atmosphere, at a temperature below 170.degree. C. and a pressure of less than 4 mm of mercury, said heating taking place in a vessel shielded from light is disclosed. The vitamin A obtained from this process is mixed with from 0.5:1 to 2:1 parts of tocopherol to vitamin A. The vitamin A and tocopherol mixture can be encapsulated in acacia gum, starch, pectins or other suitable materials. Other antioxidants can be added.
Claims19
A shelf stable, purified vitamin A preparation which is substantially free of beta-ionone and solvents, and wherein less than 5% of the vitamin A is a cis-isomer comprising a mixture of tocopherol and vitamin A, the ratio of tocopherol to vitamin A being from 0.5:1 to 2:1.
A process for removing off-flavor and odors from vitamin A comprising:
- (a) degassing a sample of vitamin A;
- (b) heating degassed vitamin A in the absence of light at a pressure of less than 4 mm Hg and a temperature of less than 170.degree. C. with an inert gas sparge until substantially of all the beta-ionone and solvents are removed;
- (c) mixing the vitamin A with from about 0.5 to 2 parts of tocopherol/part of vitamin A.
Dependencies are inferred from the claim text.