Improved method of making internal dehydration products of sugar alcohols
AssigneeArcher Daniels Midland Company
InventorsErik Hagberg, Erin M. Rockafellow, Brennan Smith, Kenneth F. Stensrud
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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.
Claims19
A process for making one or more isohexides, comprising:
- dehydrating one or more hexitols in the presence of an acid catalyst to form a crude dehydration product mixture;
- chromatographically substantially separating ionic species from the crude dehydration product mixture;
- then
- subjecting the remainder to further processing to yield a product enriched in one or more isohexides compared to the remainder.
A 100% molten isohexide-enriched product having an APHA color according to ASTM D1209 of 100 or less.
An 85% solution isohexide-enriched product having an APHA color according to ASTM D1209 of 100 or less.
Dependencies are inferred from the claim text.