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Production of 5-membered and 6-membered cyclic esters of polyols
US8937192B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937192-B2 |
| Application number | US-201313894724-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 15, 2013 |
| Priority date | May 28, 2008 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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Described herein are improved methods for the preparation of 5- and 6-membered cyclic mono and diesters of sugar alcohols and anhydrosugar alcohols by reaction with an organic acid RCOOH over a solid acidic substrate. The process is adaptable to a continuous process for simultaneously making and separating the cyclic esters from the sugar alcohols and anhydrosugar alcohols under mild conditions using the solid acid substrate as both the catalyst and a chromatographic bed for separation. The reactions are performed at mild temperatures of 70° C. to 100° C. and the formation of the cyclic esters is nearly quantitative. Also described is a method for making 5- and 6-membered cyclic mono and diesters of sugar alcohols and anhydrosugar alcohols using microwave irradiation in the presence of the organic acid.
First claim
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The invention claimed is: 1. A method of preparing cyclic esters from 5 or 6 carbon compounds comprising, contacting a column bed containing a solid acid catalyst with at least one starting 5 or 6 carbon compound sugar alcohol selected from the group consisting of arabinitol, ribitol, sorbitol, mannitol, isomannide, galactitol, iditol and xylitol and with an organic acid in a single step reaction under a single set of reaction conditions at a temperature of 70° C. to 100° C. for a…
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Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
- C07D493/04Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US8937192B2 cover?
- Described herein are improved methods for the preparation of 5- and 6-membered cyclic mono and diesters of sugar alcohols and anhydrosugar alcohols by reaction with an organic acid RCOOH over a solid acidic substrate. The process is adaptable to a continuous process for simultaneously making and separating the cyclic esters from the sugar alcohols and anhydrosugar alcohols under mild conditions…
- Who is the assignee on this patent?
- Howard Stephen, Sanborn Alexandra, Archer Daniels Midland Co
- What technology area does this patent fall under?
- Primary CPC classification C07D493/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 20 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).