GB393883A - Process for the purification of vitamin-a-preparations - Google Patents
Process for the purification of vitamin-a-preparationsInfo
- Publication number
- GB393883A GB393883A GB323/33A GB32333A GB393883A GB 393883 A GB393883 A GB 393883A GB 323/33 A GB323/33 A GB 323/33A GB 32333 A GB32333 A GB 32333A GB 393883 A GB393883 A GB 393883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- vitamin
- dissolved
- concentrates
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/59—Compounds containing 9, 10- seco- cyclopenta[a]hydrophenanthrene ring systems
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Vitamin A concentrates are obtained by dissolving the initial material in a water-miscible solvent, separating impurities by cooling to a low temperature, then adding successive quantities of water with cooling to precipitate vitamin concentrates, preferably with exclusion of oxygen, and extracting the mother liquor with an organic solvent. In examples (1) the unsaponifiable portion of the liver oil of hippoglossus vulgaris is dissolved in methanol and cooled with solid carbon dioxide in acetone, the precipitate being separated, preferably by filtration through solid carbon dioxide; additions of water are made so as to dilute the methanol to 96 and 90 per cent and then a further 15 per cent of water is added, cooling and separation of precipitated matter being effected as above described after each addition of water, the precipitates being dissolved in petroleum ether and evaporated in vacuo; a fifth product is obtained from the dilute mother liquor by adding more water and extracting with petroleum ether. The third precipitate yields a product of the highest vitamin A content; (2) the unsaponifiable portion of the liver oil of scombresox saurus is dissolved in acetone, and the extraction of concentrates is effected as above described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE393883X | 1932-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB393883A true GB393883A (en) | 1933-06-15 |
Family
ID=6394060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB323/33A Expired GB393883A (en) | 1932-01-13 | 1933-01-05 | Process for the purification of vitamin-a-preparations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB393883A (en) |
-
1933
- 1933-01-05 GB GB323/33A patent/GB393883A/en not_active Expired
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