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Phosphonic acid catalyst in dehydrative cyclization of 5 and 6 carbon polyols with improved color and product accountability
US9969704B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9969704-B2 |
| Application number | US-201415302368-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2014 |
| Priority date | Apr 10, 2014 |
| Publication date | May 15, 2018 |
| Grant date | May 15, 2018 |
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Abstract
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A process for preparing materials derived from sugar alcohols such that the dehydration products exhibit better accountability and improved color to water-clear or near water-white appearance is described. In particular, the process involves employing a reducing Brnsted acid (e.g., phosphonic acid) for the catalysis of sugar alcohols to their corresponding dehydrated-cyclized products.
First claim
Opening claim text (preview).
We claim: 1. A method for preparing isosorbide from sorbitol, comprising: dehydrating sorbitol with a phosphonic acid catalyst at elevated temperatures to produce a product mixture including isosorbide and sorbitans, then recovering isosorbide from the product mixture. 2. The method according to claim 1 , wherein isosorbide is recovered from the product mixture by at least a means selected from the group consisting of chromatography, crystallization, and distillation. 3. The method according to claim 1 , wherein said phosphonic acid is present at a catalyst load of about 1 mol. % to about 20 mol. % relative to a concentration of sorbitol. 4. The method according to claim 3 , wherein said phosphonic acid is at a catalyst load of about 2 mol. % to about 15 mol. % relative to a concentration of sorbitol. 5. The method according to claim 1 , wherein said reaction temperature is in a range from about 100° C. up to about 160° C. 6. The method according to claim 1 , wherein is produced as the primary product and 1,4-sorbitan is the next most favored product. 7. The method according to claim 1 , wherein said the reaction time is up to about 3 hours. 8. The method according to claim 1 , wherein said reaction is at an operating pressure of about 5 torr to about 100 torr. 9. The method according to claim 1 , wherein said reaction is at an operating pressure of about 10 torr to about 30 torr.
Assignees
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Classifications
Catalysts of the Raney type · CPC title
Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title
Tetrahydroxylic alcohols, e.g. pentaerythritol · CPC title
Ortho-condensed systems · CPC title
Hexahydroxylic alcohols · CPC title
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- What does patent US9969704B2 cover?
- A process for preparing materials derived from sugar alcohols such that the dehydration products exhibit better accountability and improved color to water-clear or near water-white appearance is described. In particular, the process involves employing a reducing Brnsted acid (e.g., phosphonic acid) for the catalysis of sugar alcohols to their corresponding dehydrated-cyclized products.
- Who is the assignee on this patent?
- Archer Daniels Midland Co
- What technology area does this patent fall under?
- Primary CPC classification C07C29/60. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 15 2018 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).