Method for purifying a composition containing at least one internal dehydration product of a hydrogenated sugar
US7122661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Jan 27, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a method for purifying a composition containing at least a product for internal dehydration of a hydrogenated sugar. The invention is characterised in that it comprises: (a) an optional step whereby said composition is treated, whether after re-dissolving or not, with at least a discoloration means; (b) a subsequent step whereby the composition, optionally treated with discoloration means, is treated with at least ion-exchanging means; (c) a subsequent step whereby the resulting composition is treated with at least discoloration means. Said method is in particular applicable to isohexide compositions, in particular isosorbide or isomannide. The resulting compositions, which exhibit particular characteristics in terms of purity and proportion of some impurities, constitute novel products for use in chemical, pharmaceutical, cosmetology and food industries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.