Purification of tocopherols
US4617406A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Feb 11, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/72
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Tocopherol homologues found in a tocopherol-containing feed material can be purified by forming a borate tocopherol ester and then distilling the material containing the esterified tocopherol to remove the materials boiling at temperatures lower than the esterified tocopherol. The borate tocopherol esters remaining after distillation are then reacted with a member selected from the group consisting of: Water, methanol, and ethanol to form tocopherol homologues from the borate tocopherol ester, and the boron by product from this reaction is removed. The tocopherol is then recovered by collecting it, distilling it or by any other convenient collection method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.