Method of making internal dehydration products of sugar alcohols
US9315515B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Oct 4, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Oct 4, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/34
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process is provided for making isohexides such as isosorbide with reduced color and/or improved color stability on storage, wherein ionic species in the crude dehydration product mixture are chromatographically substantially separated from the remainder of the crude product mixture, then the remainder is refined to yield a finished product for further use or sale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.