Method for Producing Anhydrosugar Alcohol by High-Pressure Reaction
US-2017240559-A1 · Aug 24, 2017 · US
Method for producing anhydrosugar alcohol by high-pressure reaction
US10752638B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10752638-B2 |
| Application number | US-201916385414-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 16, 2019 |
| Priority date | Oct 16, 2014 |
| Publication date | Aug 25, 2020 |
| Grant date | Aug 25, 2020 |
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Abstract
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The present invention relates to a method of producing anhydrosugar alcohol by dehydrating sugar alcohol at high pressure in the presence of a catalyst which is less acidic than a conventional sulfuric acid catalyst and which can suppress side reactions at high temperature. According to the present invention, anhydrosugar alcohol can be produced in a yield similar to that in a vacuum reaction.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of preparing anhydrosugar alcohol, the method comprises: dehydrating a sugar alcohol at a pressure of 10 bar to 50 bar in a presence of a catalyst, wherein the catalyst is naphthalenesulfonic acid. 2. The method of claim 1 , wherein the dehydration is performed at a temperature of 160° C. to 260° C. 3. The method of claim 1 , wherein the anhydrosugar alcohol is isosorbide, and the sugar alcohol is sorbitol. 4. The method of claim 1 , which is performed in a continuous stirred tank reactor (CSTR), a plug flow reactor (PFR) or a batch reactor (BR). 5. The method of claim 1 , wherein water, ethanol or a mixture thereof is used as a solvent. 6. The method of claim 1 , wherein the dehydration is performed in a plug flow reactor. 7. The method of claim 1 , wherein the catalyst further comprises sulfuric acid. 8. A method of preparing anhydrosugar alcohol, the method comprises: dehydrating a sugar alcohol at a pressure of 10 bar to 50 bar in a presence of a catalyst, wherein the catalyst is at least one of methanesulfonic acid and p-toluenesulfonic acid. 9. The method of claim 8 , wherein the catalyst is methanesulfonic acid. 10. The method of claim 8 , wherein the catalyst is p-toluenesulfonic acid. 11. The method of claim 8 , wherein the dehydration is performed at a temperature of 160° C. to 260° C. 12. The method of claim 8 , wherein the anhydrosugar alcohol is isosorbide, and the sugar alcohol is sorbitol. 13. The method of claim 8 , which is performed in a continuous stirred tank reactor (CSTR), a plug flow reactor (PFR) or a batch reactor (BR). 14. The method of claim 8 , wherein water, ethanol or a mixture thereof is used as a solvent. 15. The method of claim 8 , wherein the dehydration is performed in a plug flow reactor.
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Processes for the preparation of sugar derivatives · CPC title
- C07D493/04Primary
Ortho-condensed systems · CPC title
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- What does patent US10752638B2 cover?
- The present invention relates to a method of producing anhydrosugar alcohol by dehydrating sugar alcohol at high pressure in the presence of a catalyst which is less acidic than a conventional sulfuric acid catalyst and which can suppress side reactions at high temperature. According to the present invention, anhydrosugar alcohol can be produced in a yield similar to that in a vacuum reaction.
- Who is the assignee on this patent?
- Sk Innovation Co Ltd
- 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 Aug 25 2020 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).