Method of making isoidide
US9340552B2 · kind B2 · utility
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9Claims
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Assignee
Inventors
Key dates
| Filing date | Feb 19, 2013 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Sep 24, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/755
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of isoidide from isosorbide. An aqueous solution of isosorbide is subjected to epimerization in the presence of hydrogen under the influence of a catalyst comprising ruthenium on a support, preferably a carbon support. The process of the invention can be conducted using a relatively low hydrogen pressure, and leads to a desired distribution of epimers, favoring isoidide over isomannide and isosorbide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.