Stable vitamin A
US5426248A · kind A · utility
11Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Aug 3, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.